YS05S16

YS05S16 BEL | Alldatasheet

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Technical content

• RoHS lead-free solder and lead-solder-exempted products are available
• Delivers up to 16 A (58 W)
• No derating up to 85 C
• Surface-Mount package
• Industry-standard footprint and pinout
• Small size and low profile: 1.30” x 0.53” x 0.314” (33.02 x 13.46 x 7.98 mm)
• Weight: 0.22 oz [6.12 g]
• Coplanarity less than 0.003”, maximum
• Synchronous Buck Converter topology
• Start-up into pre-biased output
• No minimum load required
• Programmable output voltage via external resistor
• Operating ambient temperature: -40 °C to 85 °C
• Remote output sense
• Remote ON/OFF (positive or negative)
• Fixed-frequency operation
• Auto-reset output overcurrent protection
• Auto-reset overtemperature protection
• High reliability, MTBF approx. 64.9 Million Hours calculated per Telcordia TR-332, Method I Case 1
• All materials meet UL94, V-0 flammability rating
• Safety approved to UL/CSA 62368-1 and EN/IEC 62368-1 Bel Power Solution s point-of-load converters are recommended for use with regulated bus converters in an Intermediate Bus Architecture (IBA). The Y S05S16 non- isolated DC -DC converter delivers up to 16 A of output current in an industry -standard surface -mount package. Operating from a 3.0 – 5.5 V input, the YS05S16 converters are ideal choices for Intermediate Bus Architectures where Point-of-Load (POL) po wer delivery is generally a requirement. The converters provide an extremely tight regulated programmable output voltage from 0.7525 V to 3.63 V. The Y S05S16 converters provide exceptional thermal performance, even in high temperature environments with minimal airflow. No derating is required up to 85 C, even without airflow at natural convection. This performance is accomplished through the use of advanced circuitry, packaging, and processing techniques to achieve a design possessing ultra -high efficiency , excellent thermal management, and a very low-body profile. The low -body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling for both upstream and downstream devices. The use of 100% automation for assembl y, coupled with advanced power electronics and thermal design, results in a product with extremely high reliability. ▪ Intermediate Bus Architectures ▪ Telecommunications ▪ Data communications ▪ Distributed Power Architectures ▪ Servers, Workstations ▪ High efficiency – no heat sink required ▪ Reduces Total Solution Board Area ▪ Tape and Reel Packing ▪ Compatible with Pick & Place Equipment ▪ Minimizes Part Numbers in Inventory

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 1. ELECTRICAL SPECIFICATIONS Conditions: TA = 25 ºC, Airflow = 300 LFM (1.5 m/s), Vin = 5 VDC, Vout = 0.7525 – 3.63 V, unless otherwise specified. PARAMETER NOTES MIN TYP MAX UNITS Absolute Maximum Ratings Input Voltage Continuous -0.3 6 VDC Operating Ambient Temperature -40 85 °C Storage Temperature -55 125 °C Feature Characteristics Switching Frequency Full Temperature Range 250 300 350 kHz Output Voltage Trim Range1 By external resistor, See Trim Table 1 0.7525 3.63 VDC Remote Sense Compensation1 Percent of VOUT(NOM) 0.5 VDC Turn-On Delay Time2 Full resistive load With Vin = (Converter Enabled, then Vin applied) From Vin = Vin(min) to Vo = 0.1* Vo(nom) 3 3.5 4.5 ms With Enable (Vin = Vin(nom) applied, then enabled) From enable to Vo = 0.1*Vo(nom) 3 3.5 4.5 ms Rise time2 From 0.1*Vo(nom) to 0.9*Vo(nom) 3 3.5 5 ms ON/OFF Control (Positive Logic) 3 Converter Off -5 0.8 VDC Converter On 2.4 5.5 VDC ON/OFF Control (Negative Logic) 3 Converter Off 2.4 5.5 VDC Converter On -5 0.8 VDC Input Characteristics Operating Input Voltage Range 3.0 5.0 5.5 VDC Input Undervoltage Lockout Turn-on Threshold Guaranteed by controller 1.95 2.05 2.15 VDC Turn-off Threshold Guaranteed by controller 1.73 1.9 2.07 VDC Maximum Input Current VIN = 4.5 VDC, IOUT = 16 A VOUT = 3.3 VDC 12.7 ADC VIN = 3.0 VDC, IOUT = 16 A VOUT = 2.5 VDC 15.2 ADC VIN = 3.0 VDC, IOUT = 16 A VOUT = 2.0 VDC 12.4 ADC VIN = 3.0 VDC, IOUT = 16 A VOUT = 1.8 VDC 11.3 ADC VIN = 3.0 VDC, IOUT = 16 A VOUT = 1.5 VDC 9.7 ADC VIN = 3.0 VDC, IOUT = 16 A VOUT = 1.2 VDC 8.1 ADC VIN = 3.0 VDC, IOUT = 16 A VOUT = 1.0 VDC 7.0 ADC VIN = 3.0 VDC, IOUT = 16 A VOUT = 0.7525 VDC 5.7 ADC Input Stand-by Current (Converter disabled) Vin = 5.0 VDC 3.5 mA Input No Load Current (Converter enabled) Vin = 5.5 VDC VOUT = 3.3 VDC 91 mA VOUT = 2.5 VDC 91 mA VOUT = 2.0 VDC 87 mA VOUT = 1.8 VDC 86 mA VOUT = 1.5 VDC 85 mA VOUT = 1.2 VDC 76 mA VOUT = 1.0 VDC 76 mA VOUT = 0.7525 VDC 61 mA Input Reflected-Ripple Current - is See Fig. G for setup (BW = 20 MHz) 20 mAP-P

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 PARAMETER NOTES MIN TYP MAX UNITS Output Characteristics Output Voltage Set Point (no load) -1.5 Vout +1.5 %Vout Output Regulation4 Over Line Full resistive load 0.75 1 %Vout Over Load From no load to full load 0.75 1 %Vout Output Voltage Range Overall operating input voltage, resistive load and temperature conditions until end of life -3 +3 %Vout Output Ripple and Noise – 20 MHz bandwidth Over line, load and temperature (Fig. G) Peak-to-Peak VOUT = 3.3 VDC 30 60 mVP-P Peak-to-Peak VOUT = 0.7525 VDC 10 20 mVP-P External Load Capacitance Plus full load (resistive) Min ESR > 1 mΩ 1000 μF Min ESR > 10 mΩ 5000 μF Output Current Range 0 16 A Output Current Limit Inception (IOUT) 18 28 38 A Output Short-Circuit Current (Hiccup mode) Short = 10 mΩ, continuous 2 4 8 Arms Dynamic Response 50% Load current change from 8 A -16 A - 8 A with di/dt = 5 A/μs Co = 100 μF tant. + 1 μF ceramic 1505 mV Settling Time (VOUT < 10% peak deviation) 60 µs Efficiency Full load (16 A) VOUT = 3.3 VDC 93.0 % VOUT = 2.5 VDC 90.5 % VOUT = 2.0 VDC 88.5 % VOUT = 1.8 VDC 87.5 % VOUT = 1.5 VDC 86.0 % VOUT = 1.2 VDC 83.5 % VOUT = 1.0 VDC 81.5 % VOUT = 0.7525 VDC 77.5 % Notes: 1 The output voltage should not exceed 3.63 V (taking into account both the programming and remote sense compensation). 2 Note that startup time is the sum of turn-on delay time and rise time. 3 The converter is on if ON/OFF pin is left open. 4 Trim resistor connected across the GND (pin 5) and TRIM (pin 3) pins of the converter. 5 See waveforms for dynamic response and settling time for different output voltages.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 2. OPERATIONS 2.1. INPUT AND OUTPUT IMPEDANCE The YS05S16 converter should be connected via a low impedance to the DC power source. In many applications, the inductance associated with the distribution from the power source to the input of the converter can affect the stability of the converter. The use of deco upling capacitors is recommended in order to ensure stability of the converter and reduce input ripple voltage. Internally, the converter has 44 μF (low ESR ceramics) of input capacitance. In a typical application, low - ESR tantalum or POS capacitors wi ll be sufficient to provide adequate ripple voltage filtering at the input of the converter. However, very low ESR ceramic capacitors 100 - 200 μF are recommended at the input of the converter in order to minimize the input ripple voltage. They should be p laced as close as possible to the input pins of the converter. The YS05S16 has been designed for stable operation with or without external capacitance. Low ESR ceramic capacitors placed as close as possible to the load (minimum 100 μF) are recommended for improved transient performance and lower output voltage ripple. It is important to keep low resistance and low inductance PCB traces for connecting load to the output pins of the converter in order to maintain good load regulation. Fig. A shows input voltage ripple for various output voltages using four 47 μF input ceramic capacitors. The same plot is shown in Fig. B with one 470 μF polymer capacitor ( 6TPB470M from Sanyo) in parallel with two 47 μF ceramic capacitors at full load. Vout [V] 0 1 2 3 4 Input Voltage Ripple [mVp-p] Vin = 3.3V Vin = 5.0V Fig. A: Input Voltage Ripple, CIN = 4 x 47 μF ceramic, full load. Vout [V] 0 1 2 3 4 Input Voltage Ripple [mVp-p] Vin = 3.3V Vin = 5.0V Fig. B: Input Voltage Ripple, CIN = 470 μF polymer + 2x 47μF ceramic. 2.2. ON/OFF (PIN 1) The ON/OFF pin is used to turn the power converter on or off remotely via a system signal. There are two remote control options available, positive logic (standard option) and negative logic, with both referenced to GND. The typical connections are shown in Fig. C. To turn the converter on the ON/OFF pin should be at a logic low or left open, and to turn the converter off the ON/OFF pin should be at a logic high or connected to Vin. See the Electrical Specifications for logic high/low definitions.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Fig. C: Circuit configuration for ON/OFF function. The positive logic version turns the converter on when the ON/OFF pin is at a logic high or left open, and turns the converter off when at a logic low or shorted to GND. The negative logic version turns the converter on when the ON/OFF pin is at logic low or left open, and turns the converter off when the ON/OFF pin is at a logic high or connected to Vin. The ON/OFF pin is internally pulled up to Vin for positive logic version, and pulled down for a negative logic version. A TTL or CMOS logic gate, open- collector (open-drain) transistor can be used to drive ON/OFF pin. This device must be capable of: – sinking up to 1.2 mA at a low level voltage of  0.8 V – sourcing up to 0.25 mA at a high logic level of 2.3 V - 5.5 V. When using open -collector (open-drain) transistor with a negative logic option, add a pull -up resistor (R*) to Vin as shown in Fig. C: – 20 K, if the minimum Vin is 4.5 V – 10 K, if the minimum Vin is 3.0 V – 5 K, if the undervoltage shutdown at 2.05 - 2.15 V is required 2.3. REMOTE SENSE (PIN 2) The remote sense feature of the converter compensates for voltage drops occurring o nly between Vout pin (Pin 4) of the converter and the load. The SENSE (Pin 2) pin should be connected at the load or at the point where regulation is required (see Fig. D). There is no sense feature on the output GND return pin, where the solid ground plan e should provide a low voltage drop. Fig. D: Remote sense circuit configuration. If remote sensing is not required, the SENSE pin must be connected to the Vout pin (Pin 4) to ensure the converter will regulate at the specified output voltage. If these connections are not made, the converter will deliver an output voltage that is slightly higher than the specified value. Because the sense lead carries minimal current, large trace on the end -user board are not required. However, sense trace should be located close to a ground plane to minimize system noise and ensure optimum performance. When utilizing the remote sense feature, care must be taken not to exceed the maximum allowable output power capability of the converter, which is equal to the product of the nominal output voltage and the allowable output current for the given conditions. Rload Vin CONTROL INPUT Vin Vin GND ON/OFF SENSE (Top View) Converter TRIM Vout R* is for negative logic option only Y-Series VinVin Rw Rw Rload Vin GND ON/OFF (Top View) Converter TRIM SENSE Vout Y-Series

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 When using remote sense, the output voltage at the converter can be increased up to 0.5 V above the nominal rating in order to maintain the required voltage across the load. Therefore, the designer must, if necessary, decrease the maximum current (originally obtained from the derating curves) by the same percentage to ensure the converter’s actual output power remains at or below the maximum allowable output power. 2.4. OUTPUT VOLTAGE PROGRAMMING (PIN 3) The output voltage can be programmed from 0.7525 V to 3.63 V by connecting an external resistor between TRIM pin (Pin 3) and GND pin (Pin 5); see Fig. E. Note that when a trim resistor is not connected, the output voltage of the converter is 0.7525 V. Fig. E: Configuration for programming output voltage. A trim resistor, RTRIM, for a desired output voltage can be calculated using the following equation: 11.50.7525)- (V 07.21R REQ-O RIMT −= [kΩ] where, =TRIMR Required value of trim resistor [kΩ] =−REQOV Desired (trimmed) output voltage [V] Note that the tolerance of a trim resistor directly affects the output voltage tolerance. It is recommended to use standard 1% or 0.5% resistors; for tighter tolerance, two resistors in parallel are recommended rather than one standard value from Table 1. Ground pin of the trim resistor should be connected directly to the converter GND pin (Pin 5) with no voltage drop in between. Table 1 provides the trim resistor values for popular output voltages. V0-REG [V] RTRIM [kΩ] The Closest Standard Value [kΩ] 0.7525 open 1.0 80.0 80.6 1.2 41.97 42.2 1.5 23.1 23.2 1.8 15 15 2.0 11.78 11.8 2.5 6.95 6.98 3.3 3.16 3.16 3.63 2.21 2.21 Table 1: Trim Resistor Value Vin RTRIM Rload Converter Vin GND ON/OFF (Top View) TRIM Vout SENSEY-Series

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 The output voltage can also be programmed by external voltage source. To make trimming less sensitive, a series external resistor Rext is recommended between TRIM pin and programming voltage source. Control Voltage can be calculated by the formula: 30.1 REQ-OEXT CTRL +−= [V] where, =CTRLV Control voltage [V] =EXTR External resistor between TRIM pin and voltage source; the value can be chosen depending on the required output voltage range [kΩ]. Control voltages with =EXTR 0 and =EXTR 15K are shown in Table 2. V0-REG [V] VCTRL (REXT = 0) VCTRL(REXT = 15K) 0.7525 0.700 0.700 1.0 0.658 0.535 1.2 0.624 0.401 1.5 0.573 0.201 1.8 0.522 -0.000 2.0 0.488 -0.133 2.5 0.403 -0.468 3.3 0.268 -1.002 3.63 0.257 -1.044 Table 2: Control Voltage [VDC] 3. PROTECTION FEATURES 3.1. INPUT UNDERVOLTAGE LOCKOUT Input undervoltage lockout is standard with this converter. The converter will shut down when the input voltage drops below a pre-determined voltage; it will start automatically when Vin returns to a specified range. The input voltage must be typically 2. 05 V for the converter to turn on. Once the converter has been turned on, it will shut off when the input voltage drops below typically 1.9 V. 3.2. OUTPUT OVERCURRENT PROTECTION (OCP) The converter is protected against overcurrent and short circuit conditions. Upon sensing an overcurrent condition, the converter will enter hiccup mode. Once over-load or short circuit condition is removed, Vout will return to nominal value. 3.3. OVERTEMPERATURE PROTECTION (OTP) The converter will shut down under an overtemperature condition to protect itself from overheating caused by operation outside the thermal derating curves, or operation in abnormal conditions such as system fan failure. After the converter has cooled to a safe operating temperature, it will automatically restart. 3.4. SAFETY REQUIREMENTS The converter meets North American and International safety regulatory requirements per UL/CSA 62368 -1 and EN/IEC 62368-1. The maximum DC voltage between any two pins is Vin under all operating conditions. Therefore, the unit has ELV (extra low voltage) output; it meets ES1 requirements under the condition that all input voltages are ELV. The converter is not internally fused. To comply with safety agencies’ requirements, a recognized fuse with a maximum rating of 20 Amps must be used in series with the input line.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 4. CHARACTERIZATION 4.1. GENERAL INFORMATION The converter has been characterized for many operational aspects, to include thermal derating (maximum load current as a function of ambient temperature and airflow) for vertical and horizontal mountings, efficiency, startup and shutdown parameters, output ripple and noise, transient response to load step-change, overload, and short circuit. The figures are numbered as Fig. x.y, where x indicates the different output voltages, and y associates with sp ecific plots (y = 1 for the vertical thermal derating, …). For example, Fig. x.1 will refer to the vertical thermal derating for all the output voltages in general. The following pages contain specific plots or waveforms associated with the converter. Addi tional comments for specific data are provided below. 4.2. TEST CONDITIONS All data presented were taken with the converter soldered to a test board, specifically a 0.060” thick printed wiring board (PWB) with four layers. The top and bottom layers were not m etalized. The two inner layers, comprised of two - ounce copper, were used to provide traces for connectivity to the converter. The lack of metalization on the outer layers as well as the limited thermal connection ensured that heat transfer from the converter to the PWB was minimized. This provides a worst -case but consistent scenario for thermal derating purposes. All measurements requiring airflow were made in the vertical and horizontal wind tunnels using Infrared (IR) thermography and thermocouples for thermometry. Ensuring components on the converter do not exceed their ratings is important to maintaining high reliability. If one anticipates operating the converter at or close to the maximum loads specified in the derating curves, it is prudent to check actual operating temperatures in the application. Thermographic imaging is preferable; if this capability is not available, then thermocouples may be used. . The use of AWG #40 gauge thermocouple is recommended to ensure measurement accuracy. Carefu l routing of the thermocouple leads will further minimize measurement error. Refer to Fig. F for the optimum measuring thermocouple location. Fig. F: Location of the thermocouple for thermal testing. 4.3. THERMAL DERATING of 120°C. Ambient temperature was varied between 25 °C and 85 °C, with airflow rates from 30 to 500 LFM (0.15 m/s to 2.5 m/s), and vertical and horizontal mountings. The airflow during the testing is parallel to the short axis of the converter, going from pin 1 and pin 6 to pins 2–5. For each set of conditions, the maximum load current is defined as the lowest of: (i) The output current at which a ny MOSFET temperature does not exceed a maximum specified temperature (120°C) as indicated by the thermographic image, or (ii) The maximum current rating of the converter (16 A). During normal operation, derating curves with maximum FET tem perature less than or equal to 120 °C should not be exceeded. Temperature on the PCB at the thermocouple location shown in Fig. F should not exceed 120 °C in order to operate inside the derating curves.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 4.4. EFFICIENCY Fig. x.3 shows the efficiency vs. load current plot for ambient temperature of 25ºC, airflow rate of 200 LFM (1 m/s) and 4.5. POWER DISSIPATION Fig. 3.3V.4 shows the power dissipation vs. load current plot for Ta = 25 ºC, airflow rate of 200 LFM (1 m/s) with vertical 4.6. RIPPLE AND NOISE The output voltage ripple waveform is measured at full rated load current. Note that all output voltage waveforms are measured across a 1 μF ceramic capacitor. The output voltage ripple and input reflected-ripple current waveforms are obtained using the test setup, see Fig. G. Fig. G: Test setup for measuring input reflected-ripple currents, is and output voltage ripple. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 3.3V.1: Available load current vs. ambient temperature and airflow rates for Vout = 3.3 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature  120 C. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 3.3V.2: Available load current vs. ambient temperature and airflow rates for Vout = 3.3 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature  120 C. iS Vout Vsource 1F ceramic capacitor 1 H source inductance DC-DC Converter 4x47F ceramic capacitor 100F ceramic capacitor COCIN Y-Series

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.75 0.80 0.85 0.90 0.95 1.00 5.5 V 5.0 V 4.5 V Fig. 3.3V.3: Efficiency vs. load current and input voltage for Vout = 3.3 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Load Current [Adc] 0 3 6 9 12 15 18 Power Dissipation [W] 5.5 V 5.0 V 4.5 V Fig. 3.3V.4: Power loss vs. load current and input voltage for Vout = 3.3 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Fig. 3.3V.5: Turn-on transient for Vout = 3.3 V with application of Vin at full rated load current (resistive) and 100 μF external capacitance at Vin = 5 V. Top trace: Vin (5 V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 2 ms/div. Fig. 3.3V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 100 μF ceramic + 1 μF ceramic and Vin = 5 V for Vout = 3.3V. Time scale: 2 μs/div. Fig. 3.3V.7: Output voltage for Vout = 3.3 V to positive load current step change from 8 A to 16 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Fig. 3.3V.8: Output voltage response for Vout = 3.3 V to negative load current step change from 16 A to 8 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 2.5V.1: Available load current vs. ambient temperature and airflow rates for Vout = 2.5 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature  120 C. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 2.5V.2: Available load current vs. ambient temperature and airflow rates for Vout = 2.5 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature  120 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.75 0.80 0.85 0.90 0.95 1.00 5.5 V 5.0 V 4.5 V Fig. 2.5V.3: Efficiency vs. load current and input voltage for Vout = 2.5 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.75 0.80 0.85 0.90 0.95 1.00 3.6 V 3.3 V 3.0 V Fig. 2.5V.4: Efficiency vs. load current and input voltage for Vout = 2.5 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Fig. 2.5V.5: Turn-on transient for Vout = 2.5 V with application of Vin at full rated load current (resistive) and 100 μF external capacitance at Vin = 5 V. Top trace: Vin (5 V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 2 ms/div. Fig. 2.5V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 100 μF ceramic + 1 μF ceramic and Vin = 5 V for Vout = 2.5V. Time scale: 2 μs/div.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Fig. 2.5V.7: Output voltage response for Vout = 2.5 V to positive load current step change from 8 A to 16 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Fig. 2.5V.8: Output voltage response for Vout = 2.5 V to negative load current step change from 16 A to 8 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 2.0V.1: Available load current vs. ambient temperature and airflow rates for Vout = 2.0 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature  120 C. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 2.0V.2: Available load current vs. ambient temperature and airflow rates for Vout = 2.0 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature  120 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.70 0.75 0.80 0.85 0.90 0.95 5.5 V 5.0 V 4.5 V Fig. 2.0V.3: Efficiency vs. load current and input voltage for Vout = 2.0 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.70 0.75 0.80 0.85 0.90 0.95 3.6 V 3.3 V 3.0 V Fig. 2.0V.4: Efficiency vs. load current and input voltage for Vout = 2.0 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Fig. 2.0V.5: Turn-on transient for Vout = 2.0 V with application of Vin at full rated load current (resistive) and 100μF external capacitance at Vin = 5 V. Top trace: Vin (5 V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 2 ms/div. Fig. 2.0V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 100 μF ceramic + 1 μF ceramic and Vin = 5 V for Vout = 2.0V. Time scale: 2 μs/div. Fig. 2.0V.7: Output voltage response for Vout = 2.0 V to positive load current step change from 8 A to 16 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Fig. 2.0V.8: Output voltage response for Vout = 2.0 V to negative load current step change from 16 A to 8 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 1.8V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.8 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature  120 C. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 1.8V.2: Available load current vs. ambient temperature and airflow rates for Vout = 1.8 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature  120 C.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.70 0.75 0.80 0.85 0.90 0.95 5.5 V 5.0 V 4.5 V Fig. 1.8V.3: Efficiency vs. load current and input voltage for Vout = 1.8 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.70 0.75 0.80 0.85 0.90 0.95 3.6 V 3.3 V 3.0 V Fig. 1.8V.4: Efficiency vs. load current and input voltage for Vout = 1.8 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Fig. 1.8V.5: Turn-on transient for Vout = 1.8 V with application of Vin at full rated load current (resistive) and 100μF external capacitance at Vin = 5 V. Top trace: Vin (5 V/div.); Bottom trace: output voltage (1V/div.); Time scale: 2 ms/div. Fig. 1.8V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 100 μF ceramic + 1 μF ceramic and Vin = 5 V for Vout = 1.8V. Time scale: 2 μs/div. Fig. 1.8V.7: Output voltage response for Vout = 1.8 V to positive load current step change from 8 A to 16 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Fig. 1.8V.8: Output voltage response for Vout = 1.8 V to negative load current step change from 16 A to 8 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 1.5V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.5 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature  120 C. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 1.5V.2: Available load current vs. ambient temperature and airflow rates for Vout = 1.5 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature  120 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.70 0.75 0.80 0.85 0.90 0.95 5.5 V 5.0 V 4.5 V Fig. 1.5V.3: Efficiency vs. load current and input voltage for Vout = 1.5 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.70 0.75 0.80 0.85 0.90 0.95 3.6 V 3.3 V 3.0 V Fig. 1.5V.4: Efficiency vs. load current and input voltage for Vout = 1.5 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Fig. 1.5V.5: Turn-on transient for Vout = 1.5 V with application of Vin at full rated load current (resistive) and 100 μF external capacitance at Vin = 5 V. Top trace: Vin (5 V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 2 ms/div. Fig. 1.5V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 100 μF ceramic + 1 μF ceramic and Vin = 5 V for Vout = 1.5 V. Time scale: 2 μs/div.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Fig. 1.5V.7: Output voltage response for Vout = 1.5 V to positive load current step change from 8 A to 16 A with slew rate of 5 A/μs at Vin = 5V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Fig. 1.5V.8: Output voltage response for Vout = 1.5 V to negative load current step change from 16 A to 8 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 1.2V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.2 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature  120 C. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 1.2V.2: Available load current vs. ambient temperature and airflow rates for Vout = 1.2 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature  120 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.65 0.70 0.75 0.80 0.85 0.90 5.5 V 5.0 V 4.5 V Fig. 1.2V.3: Efficiency vs. load current and input voltage for Vout = 1.2 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.65 0.70 0.75 0.80 0.85 0.90 3.6 V 3.3 V 3.0 V Fig. 1.2V.4: Efficiency vs. load current and input voltage for Vout = 1.2 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Fig. 1.2V.5: Turn-on transient for Vout = 1.2 V with application of Vin at full rated load current (resistive) and 100 μF external capacitance at Vin = 5 V. Top trace: Vin (5 V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 2 ms/div. Fig. 1.2V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 100 μF ceramic + 1 μF ceramic and Vin = 5 V for Vout = 1.2 V. Time scale: 2 μs/div. Fig. 1.2V.7: Output voltage response for Vout = 1.2 V to positive load current step change from 8 A to 16 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div Fig. 1.2V.8: Output voltage response for Vout = 1.2 V to negative load current step change from 16 A to 8 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 1.0V.1: Available load current vs. ambient temperature and airflow rates for Vout = 1.0 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature  120 C. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 1.0V.2: Available load current vs. ambient temperature and airflow rates for Vout = 1.0 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature  120 C.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.65 0.70 0.75 0.80 0.85 0.90 5.5 V 5.0 V 4.5 V Fig. 1.0V.3: Efficiency vs. load current and input voltage for Vout = 1.0 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.65 0.70 0.75 0.80 0.85 0.90 3.6 V 3.3 V 3.0 V Fig. 1.0V.4: Efficiency vs. load current and input voltage for Vout = 1.0 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Fig. 1.0V.5: Turn-on transient for Vout = 1.0 V with application of Vin at full rated load current (resistive) and 100 μF external capacitance at Vin = 5 V. Top trace: Vin (5 V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 2 ms/div. Fig. 1.0V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 100 μF ceramic + 1 μF ceramic and Vin = 5 V for Vout = 1.0 V. Time scale: 2 μs/div. Fig. 1.0V.7: Output voltage response Vout = 1.0 V to positive load current step change from 8 A to 16 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div. Fig. 1.0V.8: Output voltage response for Vout = 1.0 V to negative load current step change from 16 A to 8 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic + 1 μF ceramic. Time scale: 20 μs/div.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 0.7525V.1: Available load current vs. ambient temperature and airflow rates for Vout = 0.7525 V converter mounted vertically with Vin = 5 V, and maximum MOSFET temperature  120 C. Ambient Temperature [°C] 20 30 40 50 60 70 80 90 Load Current [Adc] 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 30 LFM (0.15 m/s) Fig. 0.7525V.2: Available load current vs. ambient temperature and airflow rates for Vout = 0.7525 V converter mounted horizontally with Vin = 5 V, and maximum MOSFET temperature  120 C Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.60 0.65 0.70 0.75 0.80 0.85 5.5 V 5.0 V 4.5 V Fig. 0.7525V.3: Efficiency vs. load current and input voltage for Vout = 0.7525 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Load Current [Adc] 0 3 6 9 12 15 18 Efficiency 0.60 0.65 0.70 0.75 0.80 0.85 3.6 V 3.3 V 3.0 V Fig. 0.7525V.4: Efficiency vs. load current and input voltage for Vout = 0.7525 V converter mounted vertically with air flowing at a rate of 200 LFM (1 m/s) and Ta = 25 C. Fig. 0.7525V.5: Turn-on transient for Vout = 0.7525 V with application of Vin at full rated load current (resistive) and 100 μF external capacitance at Vin = 5 V. Top trace: Vin (5 V/div.); Bottom trace: output voltage (1 V/div.); Time scale: 2 ms/div. Fig. 0.7525V.6: Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with external capacitance 100 μF ceramic + 1 μF ceramic and Vin = 5 V for Vout = 0.7525 V. Time scale: 2 μs/div.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 Fig. 0.7525V.7: Output voltage response for Vout = 0.7525 V to positive load current step change from 8 A to 16 A with slew rate of 5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div. Fig. 0.7525V.8: Output voltage response for Vout = 0.7525 V to negative load current step change from 16 A to 8 A with slew rate of -5 A/μs at Vin = 5 V. Top trace: output voltage (100 mV/div.); Bottom trace: load current (5 A/div.). Co = 100 μF ceramic. Time scale: 20 μs/div.

© 2015 Bel Power Solutions, Inc. +1 866 513 2839 tech.support@psbel.com BCD.00704_AA1 5. PHYSICAL INFORMATION YS05S Pinout (Surface-Mount) 6. ORDERING INFORMATION PRODUC T SERIES INPUT VOLTAGE MOUNTING SCHEME RATED LOAD CURRENT ENABLE LOGIC ENVIRONMENTAL YS 05 S 16 – 0 Y-Series 3.0 – 5.5 V S  Surface- Mount 16 A (0.7525 V to 3.63 V) 0  Standard (Positive Logic) D  Opposite of Standard (Negative Logic) No Suffix  RoHS lead-solder-exempt compliant G  RoHS compliant for all six substances The example above describes P/N YS05S16-0: 3.0 – 5.5 V input, surface mount, 16 A at 0.7525 V to 3.63 V output, standard enable logic, and Eutectic Tin/Lead solder. Please consult factory for the complete list of available options. NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. TOP VIEW (*) PIN # 1 ROTATED 90° SIDE VIEW 3 4 5 1(*) PAD/PIN CONNECTIONS Pad/Pin # Function

1 ON/OFF

2 SENSE

3 TRIM

4 Vout

5 GND

6 Vin

• All dimensions are in inches [mm]
• Connector Material: Copper
• Connector Finish: Gold over Nickel
• Converter Weight: 0.22 oz [6.12 g]
• Converter Height: 0.327” Max., 0.301” Min.
• Recommended Surface-mount Pads: