PT5820

PT5820 TI | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 10

Technical content

Features

• 12V Input
• DSP Compatible
• High Efficiency (90+%)
• Output Margin Control (±5%)
• Adjustable Output Voltage
• On/Off Enable Function
• Over-Current Protection Pin-Out Information * For Inhibit pin: Open = output enabled Ground = output disabled

Description

The PT5820 Excalibur™ series of integrated switching regulators (ISRs) combines outstand- ing power density with a comprehensive list of features. They are an ideal choice for applications where board space is a premium and performance cannot be compromised. These modules provide a full 16A of output current, yet are housed in a low-profile, 18-pin, package. The integral copper case construction requires no heatsink, and offers the advantages of solderability and a small foot- print (0.736 in² for suffix ‘N’). Both through-hole and surface mount pin configurations are available. The PT5820 series operates from a 12-V input bus and provides a convenient point-of-load power source for the industry’s latest high-performance DSPs and microprocessors. The series includes output voltage options as low as 1.0VDC. Other features include external output voltage adjustment, a ±5% margin control, on/off enable, short circuit protection, and thermal shutdown. A 560-µF input capacitor and 330µF output capacitor are required for proper operation. PT Series Suffix (PT1234x) Case/Pin Order Package Configuration Suffix Code Vertical N (EPP) Horizontal A (EPQ) SMD C (EPS) (Reference the applicable package code draw- ing for the dimensions and PC board layout)

• Thermal Shutdown
• Low-Profile (8mm)
• Small Footprint (0.736 in², Suffix ‘N’)
• Solderable Copper Case
• Surface Mount Compatible PT5820 Vo Adjust Margin Up Margin Down VIN 9–13 411 8 14–175, 6, 7 L O A D C IN 560µF (Required) + C OUT 330µF (Required) Inhibit GND GND VOUT Sense(+) Sense(–)

For technical support and more information, see inside back cover or visit www.ti.com PT5820 Series 16-A 12-V Input Adjustable Integrated Switching Regulator Performance Specifications (Unless otherwise stated, T a =25°C, Vin =12V, Cin =560µF, Cout =330µF, and Io =Iomax) PT5820 Series Characteristics Symbols Conditions Min Typ Max Units Output Current I o 0— 1 6 A Input Voltage Range V in Over Io range 10.8 — 13.2 V Set-Point Voltage Tolerance V o tol — — ±2 %V o Temperature Variation ∆Regtemp –40°C <Ta < +85°C — ±0.5 — %V o Line Regulation ∆Regline Over Vin range — ±6 — mV Load Regulation ∆Regload Over Io range — ±12 — mV Total Output Variation ∆Regtot Includes set-point, line, load, ——± 3% V o–40°C ≤ Ta ≤ +85°C Efficiency η PT5827 (5.0V) — 93 — PT5821 (3.3V) — 90 — PT5822 (2.5V) — 88 — PT5825 (1.2V) — 80 — PT5826 (1.0V) — 77 — Vo Ripple (pk-pk) V r 20MHz bandwidth — 20 — mVpp Transient Response 1A/µs load step, 50% to 100% I omax, ttr Recovery Time — 50 — µSec ∆Vtr Vo over/undershoot — 70 — mV Over-Current Threshold I TRIP Reset, followed by auto-recovery — 22 — A Output Voltage Adjust V o adj with V o Adjust — ±10 — %with Margin Up/Down — ±5 — Switching Frequency ƒ s Over Vin and Io ranges 300 350 400 kHz Inhibit Control (pin 2) Referenced to GND (pins 9–13) Input High Voltage V IH Vin –0.5 — Open (1) V Input Low Voltage VIL –0.2 — 0.8 Input Low Current IIL Pin 2 to GND — –0.5 — mA Standby Input Current I in standby Pin 2 to GND — 2 — mA External Input Capacitance C in 560 (2) ——µ F External Output Capacitance C out 330 (3) — TBD µF Operating Temperature Range T a Over Vin range –40 — +85 (4) °C Over-T emperature Shutdown OTP Center of case, auto-reset V o ≥3.3V — TBD — °CVo ≤2.5V — TBD — Storage Temperature T s — -40 — +125 °C Reliability MTBF Per Bellcore TR-332 6.3 — — 10 6 Hrs50% stress, Ta =40°C, ground benign Mechanical Shock Mil-STD-883D, Method 2002.3 — TBD — G’s Half Sine, mounted to a fixture Mechanical Vibration Mil-STD-883D, Method 2007.2, Vertical 20-2000 Hz, PCB mounted Horizontal — TBD (5) —G ’ s Weight — — — 20 — grams Flammability — Materials meet UL 94V-0 Notes: (1) The Inhibit control (pin 2) has an internal pull-up to 12V (V in), and if left open-circuit the module will operate when input power is applied. A small low-leakage (<100nA) MOSFET is recommended to control this input. See application notes for more information. (2) A 560µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimumm of 1.3Arms of ripple current. For further information, consult the related application note on capacitor selection. (3) An external 330µF output capacitor is required for proper operation. Distributed load capacitance can be included in this va lue. (4) See SOA curves or consult factory for the appropriate derating. (5) The case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable p ackage outline drawing.

For technical support and more information, see inside back cover or visit www.ti.com Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR. Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating t emperatures. Efficiency vs Output Current Power Dissipation vs Output Current Performance Data; Vin =12.0V (See Note A) Output Ripple vs Output Current PT5820 Series 16-A 12-V Input Adjustable Integrated Switching Regulator Pin Descriptions +Vin: The positive supply voltage input for the module with respect to the common GND. +Vo: This is the regulated output voltage from the mod- ule with respect to the common GND. GND: The common GND node to which the input, out- put, and external control signals are referenced. Sense(–): Provides the regulator with the ability to sense the set-point voltage directly across the load. For opti- mum output voltage accuracy this pin should always be connected to GND, even for applications that demand a relatively light load. Sense(+): When used with Sense(–), the regulation cir- cuitry will compensate for voltage drop between the converter and the load. The pin may be left open circuit, but connecting it to +V o will optimize load regulation.. Inhibit: This is an active low input, which is referenced to GND. Driving this pin to GND disables the module’s output voltage. If Inhibit is left open-circuit, the output will be active whenever a valid input source is applied. V o Adjust: This pin is used to trim the output voltage to a value within a range of up to ±10% of the setpoint. The adjustment requires an external resistor. The resistor is connected from Vo Adjust, to either the Sense(–) or Sense(+), in order to adjust the output voltage either up or down, respectively. Margin Up: When this pin is connected to Sense(–), the output voltage is increased by 5% of the nominal setpoint. The Margin Up and Margin Down control inputs provide a convenient method for testing the operation of the load circuit over a ±5% variation in the supply voltage. Margin Down: When this pin is connected to Sense(–), the output voltage is decreased by approximately 5% from the nominal. Typical Characteristics 100 048 1 2 1 6 Iout (A) Efficiency - % PT5827 PT5821 PT5822 PT5823 PT5824 PT5825 PT5826 0 4 8 12 16 Iout (A ) Ripple - mV PT5827 PT5821 PT5822 PT5823 PT5824 PT5825 PT5826 048 1 2 1 6 Iout (A ) Pd - Watts PT5827 PT5821 PT5824 PT5826

For technical support and more information, see inside back cover or visit www.ti.com PT5820 Series 16-A 12-V Input Adjustable Integrated Switching Regulator Typical Characteristics Safe Operating Curves, Vin =12V (See Note B) 0 4 8 12 16 Iout (A ) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 0 4 8 12 16 Iout (A ) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow 0 4 8 12 16 Iout (A ) Ambient Temperature (°C) 200LFM 120LFM 60LFM Nat conv Airflow PT5827, Vout =5V PT5821, Vout =3.3V PT5822 .. PT5826, V out ≤≤≤≤≤2.5V Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the ISR. Note B: SOA curves represent operating conditions at which internal components are at or below manufacturer’s maximum rated operating t emperatures.

For technical support and more information, see inside back cover or visit www.ti.com PT5820 Series Operating Features of the PT5820 Series of Step-Down Integrated Switching Regulators Under-Voltage Lockout (UVLO) The PT5820 series of non-isolated step-down ISRs incorporate an under-voltage lockout (UVLO) function. The UVLO provides a clean transition during power-up and power-down, allowing the regulator to tolerate a slowly rising input voltage. The UVLO prevents opera- tion of the regulator until the input voltage is at or above above the UVLO threshold. The UVLO threshold is just below the minimum input voltage. Until the input voltage is above this threshold, the status of the Inhibit control (pin 2) is overriden, and the module will not produce an output. When the minimum input voltage of 10.8V is applied, the output status is determined by the Inhibit control. If the Inhibit pin is open-circuit (not grounded), the module will automatically power up. (Note: Even though the applied input voltage may be above the UVLO threshold, operation to the published specifications requires that the input voltage be at or above the minimum specified. Operation of the module below the minimum input voltage is not recommended). Soft-Start Power Up Following either the application of a valid input source voltage, or the removal of a ground signal to the Inhibit control pin (with input power applied), the regulator will initiate a soft-start power up. The soft start slows the rate at which the output voltage rises, and also introduces a short time delay, t d (approx. 10–15ms). Figure 1-1 shows the power-up characteristic of a PT5821 (3.3V). The delay time, t d, is measured from the point at which the input voltage rises above the UVLO threshold to when the output voltage starts to rise. During this period the output of the regulator will assert a low impedance to ground. This has the effect of discharging any residual voltage across the output capacitors, and will crowbar any voltage supplied from external sources. Figure 1-1; Soft-Start Power Up Over-Current Protection T o protect against load faults, the PT5820 series incor- porates output over-current protection. Applying a load that exceeds the regulator’s over-current threshold (see data sheet specifications) will cause the regulated output to shut down. Following shutdown the ISR will periodi- cally attempt to recover by initiating a soft-start power-up. This is often described as a “hiccup” mode of operation, whereby the module continues in the cycle of successive shutdown and power up until the load fault is removed. During this period, the average current flowing into the fault is significantly reduced. Once the fault is removed, the converter automatically recovers and returns to normal operation. Thermal Shutdown The PT5820 series ISRs incorporate thermal shutdown, which protects the module’s internal circuitry against excessively high temperatures. A rise in the temperature of the internal components may be the result of a drop in airflow, or a high ambient temperature. If the module’s internal temperature exceeds the shutdown threshold (see data sheet specifications), the regulator output is disabled and the output voltage is reduced to zero. The recovery is automatic, and begins with a soft-start power up. It occurs when the the sensed temperature decreases by about 10°C below the trip point. Note: The over-temperature protection is a last resort mecha- nism to prevent thermal stress to the regulator. Operation at or close to the thermal shutdown temperature is not r ecom- mended and will reduce the long-term reliability of the module. Always operate the regulator within the specified Safe Operating Area (SOA) limits for the worst-case conditions of ambient temperature and airflow. Output Voltage Adjustment The PT5820 series ISRs offer OEMs two alternative methods of output voltage adjustment. The Margin Up and Margin Down control inputs provide a convenient method of adjusting the output voltage by a nominal ±5% of the factory setpoint voltage. For a more perma- nent and precise method of adjustment, the V o Adjust control allows the output to be adjusted in any incre- ment by up to ±10%. For more information on this subject, consult the related application note on output voltage adjustment. Vo (2V/Div) Vin (5V/Div) HORIZ SCALE: 5ms/Div td

For technical support and more information, see inside back cover or visit www.ti.com PT5820 Series Adjusting the Output Voltage of the PT5820 Series of Step-Down ISRs Using Margin Up/ Margin Down The Margin Up (pin 4) and Margin Down (pin 3) control inputs allow the output voltage to be easily adjusted by approximately ±5% of the the set-point voltage. These control inputs provide a convenient method for applying a momentary adjustment to test a load circuit’s supply voltage margins. To activate, simply connect the appro- priate control input to the Sense(–) (pin 8), or the local starpoint ground. Either a logic level MOSFET or a p-channel JFET is recommended for this application. Using the ‘Vo Adjust’ Control For a more permanent and precise adjustment, use the Vo Adjust control (pin 1). The Vo Adjust control allows adjustment in any increment by up to ±10% of the set- point. The adjustment method requires the addition of a single external resistor. Table 3-1 gives the allowable adjustment range for each model of the series as V a (min) and Va (max). The value of the external resistor can either be calculated using the formulas given below, or simply selected from the range of values provided in Table 3-2. Refer to Figure 3-1 for the placement of the required resistor. Use the resistor R 1 to adjust up, and the resistor (R2) to down. Adjust Up: An increase in the output voltage is obtained by adding a resistor R 1, between Vo Adjust (pin 1) and Sense(–) (pin 8). See Figure 3-1. Adjust Down: Add a resistor (R2), between Vo Adjust (pin 1) and Sense(+) (pin 18). See Figure 3-1. Figure 3-1; Vo Adjust Resistor Placement Vo Adjust Resistor Calculations The values of R 1 [adjust up] and (R2) [adjust down] can also be calculated using the following formulas. Again, use Figure 3-1for the placement of the required resistor; either R 1 or (R2) as appropriate. R1 = Vr · Ro – 24.9 k Ω Va – Vo (R2) = Ro (Va – Vr) – 24.9 k Ω Vo – Va Where: V o = Original output voltage Va = Adjusted output voltage Vr = The reference voltage in Table 3-1 Ro = The resistance constant in Table 3-1 Table 3-1 ISR OUTPUT VOLTAGE ADJUSTMENT RANGE AND FORMULA PARAMETERS Series Pt. No. PT5827 PT5821 PT5822 PT5823 PT5824 PT5825 PT5826 Notes: 1. Use a 1% (or better) tolerance resistor in either the R 1 or (R2) location. Place the resistor as close to the ISR as possible. 2. Never connect capacitors from Vo Adjust to either GND or Vout. Any capacitance added to the Vo Adjust pin will affect the stability of the ISR. 3. If the remote sense feature is not being used, the adjust resistor (R2) can be connected to Vout, (pins 14-17) instead of Sense (+). PT5820 9–13 1 14–17

8 C OUT

330µF (Optional) GND VOUT Sense (+) [Note 3] Sense (–) (R2) Adj Down VO AdjGND Sense(+) Sense(–) VOUT R 1 Adjust Up

For technical support and more information, see inside back cover or visit www.ti.com Application Notes continued Va (req.d) 2.800 3.6K Ω 2.750 9.3K Ω 2.700 17.9K Ω 2.650 32.2K Ω 2.600 60.7K Ω 2.550 146.0K Ω 2.500 2.450 (321.0)kΩ 2.400 (146.0)kΩ 2.350 (85.7)kΩ 2.300 (55.3)kΩ 2.250 (37.2)kΩ 2.200 (25.0)kΩ 2.150 (16.4)kΩ 2.000 (0.8)kΩ 15.9kΩ 1.950 29.5k Ω 1.900 56.7k Ω 1.850 138.0k Ω 1.800 1.1k Ω 1.750 (169.0)kΩ 6.3kΩ 1.700 (66.9)kΩ 14.1kΩ 1.650 (32.9)kΩ 27.2kΩ 1.600 (15.9)kΩ 53.2kΩ 1.550 (5.7)kΩ 131.0kΩ 1.500 1.8k Ω 1.475 (239.0)kΩ 4.2kΩ 1.450 (102.0)kΩ 7.1kΩ 1.425 (56.4)kΩ 10.7kΩ 1.400 (33.7)kΩ 15.1kΩ 1.375 (20.0)kΩ 20.8kΩ 1.350 (10.9)kΩ 28.4kΩ 1.325 (4.4)kΩ 39.1kΩ 1.300 55.1k Ω 2.3kΩ 1.275 81.8k Ω 4.8kΩ 1.250 135.0k Ω 7.7kΩ 1.225 295.0k Ω 11.4kΩ 1.200 15.9k Ω 1.175 (125.0)kΩ 21.7kΩ 1.150 (45.1)kΩ 29.5kΩ 1.125 (18.4)kΩ 40.4kΩ 1.100 (5.1)kΩ 56.7kΩ 1.075 83.9k Ω 1.050 138.0k Ω 1.025 302.0K Ω 1.000 0.975 (46.5)kΩ 0.950 (5.7)kΩ PT5820 Series Table 3-2 ISR ADJUSTMENT RESISTOR VALUES Series Pt. No. PT5827 PT5821 PT5822 PT5823 PT5824 PT5825 PT5826 Va (req.d) 5.50 0.5k Ω 5.40 6.9k Ω 5.30 17.4k Ω 5.20 38.6k Ω 5.10 102.0k Ω 5.00 4.90 (338.0)kΩ 4.80 (152.0)kΩ 4.70 (89.4)kΩ 4.60 (58.3)kΩ 4.50 (39.7)kΩ 4.40 (27.3)kΩ 4.30 (18.4)kΩ 4.20 (11.7)kΩ 4.10 (6.5)kΩ 4.00 (2.4)kΩ 3.60 2.3k Ω 3.55 7.7k Ω 3.50 15.9k Ω 3.45 29.5k Ω 3.40 56.7k Ω 3.35 138.0k Ω 3.30 3.25 (475.0)kΩ 3.20 (220.0)kΩ 3.15 (135.0)kΩ 3.10 (92.4)kΩ 3.05 (66.9)kΩ 3.00 (49.9)kΩ 2.95 (37.5)kΩ 2.90 (28.6)kΩ 2.85 (21.6)kΩ 2.80 (15.9)kΩ 2.75 (11.3)kΩ 2.70 (7.4)kΩ 2.65 (4.1)kΩ 2.60 (1.3)kΩ R1 = Black R 2 = (Blue)

For technical support and more information, see inside back cover or visit www.ti.com Table 4-1: Input/Output Capacitors (1) N/R –Not recommended. The voltage rating does not meet the m inimum operating limits. (2) Recommended Input capacitor when V o<2.6V; lower RMS mA required . Capacitor Recommendations for the PT5820 Regulator Series Input Capacitor: The recommended input capacitance is determined by 1.3 ampere minimum ripple current rating and 560µF minimum capacitance. Ripple current and <100m Ω equivalent series resistance (ESR) values are the major considerations, along with temperature, when designing with different types of capacitors. Tantalum capacitors have a recommended minimum voltage rating of twice the maximum DC voltage + AC ripple. This is necessary to insure reli- ability for input voltage bus applications. Output Capacitors: The maximum allowable ESR of the output capacitor is 150mΩ . Electrolytic capacitors have marginal ripple performance at frequencies greater than 400kHz but excellent low frequency transient response. Above the ripple frequency, ceramic capacitors are necessary to improve the transient response and reduce any high frequency noise components apparent during higher current excursions. Preferred low ESR type capacitor part numbers are identified in Table 4-1. PT5820 Series Tantalum Capacitors Tantalum type capacitors can be used for the output but only the AVX TPS, Sprague 593D/594/595 or Kemet T495/T510 series. These capacitors are recommended over many other tantalum types due to their higher rated surge, power dissipation, and ripple current capability. As a caution the TAJ series by AVX is not recommended. This series has considerably higher ESR, reduced power dissipation, and lower ripple current capability. The TAJ series is less reliable than the AVX TPS series when deter- mining power dissipation capability. Tantalum or Oscon® types are recommended for applications where ambient temperatures fall below 0°C. Capacitor Table Table 1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple cur- rent (rms) ratings. The number of capacitors required at both the input and output buses is identified for each capacitor type. This is not an extensive capacitor list. Capacitors from other vendors are available with comparable specifications. Those listed are for guidance. The RMS ripple current rating and ESR (Equivalent Series Resistance at 100kHz) are critical parameters necessary to insure both optimum regulator performance and long capacitor life. /rodneVroticapaC seireS scitsiretcarahCroticapaCy titnauQ gnikroW egatloV )Fµ(eulaVt nelaviuqE)RSE( ecnatsiseRseireS mumixaMC°501 elppiR )smrI(tnerruC lacisyhP )mm(eziS tupnI suB tuptuO suB rebmuNtraProdneV cinosanaP )laidaR(CF )gtMecafruS(KF/CF V53 V52 V52 V05 V53 V05 086 033 0001 0001 086 0001 340.0 Ω 090.0 Ω 830.0 Ω 3700 Ω 060.0 Ω 370.0 Ω Am5561 Am557 Am0961 Am0161 Am0011 Am0161 5.21 × 02 01 × 5.21 61 × 51 61 × 5.61 5.21 × 5.31 61 × 5.61 R/N )1( 1 )2( 186V1CFUEE 133E1CFUEE S201E1CFUEE M201H1KFVEE Q186V1KFVEE )V6.2<oV( M201H1KFVEE noc-imehCdetinU seireSVXL/ZXL )gtMecafruS(YVM V53 V53 V52 086 086 033 730.0 Ω 860.0 Ω 51.0 Ω Am0661 Am0501 Am076 5.21 × 02 01 × 61 01 × 3.01 )2( R/N )1( LL02X21M186BV53ZXL LL02X61M201BV53VXL V6.2<oV( ) PT01X01M133CV52YVM nocihciN seireSLP seireSMP V53 V52 V52 086 0721 028 240.0 Ω 550.0 Ω 940.0 Ω Am0451 Am0721 Am0431 81 × 51 61 × 51 61 × 51 )2( 6HHM186V1LPU 6HHM221E1LPU )V6.2<oV( 6HHM128E1MPU :noc-sO SS )tnuoMecafrus(PVS seireSVSdlO V01 V61 033 033 520.0 Ω 610.0 Ω Am0053 Am0074 01 × 5.01 11 × 21 R/N )1( M033SS01 V( o )V1.5< M033PVS61 mulatnaTXVA )tgtMecafruS(SPT V01 V01 033 033 1.0 Ω 60.0 Ω Am0052> Am0003> L3.7 × W7.5 × H1.4 R/N )1( R/N )1( 0010R010M733ESPT V( o )V1.5< 0600R010M733VSPT V( o )V1.5< mulatnaTtemeK seireS594T/025T (t nuoMecafruS) V01 V3.6 033 022 040.0 Ω 70.0 Ω Am0061 Am0002> W3.4 × L3.7 × H0.4 R/N )1( R/N )1( SA010M733X025 SA0010M722X594T mulatnaTeugarpS seireSD495 (t nuoMecafruS) V010 335 40.0 Ω Am0632L 2.7 × W6 × H1.4 R/N )1( 1T 2R0100X733D495

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using TI components. To minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information published by TI regarding third–party products or services does not constitute a license from TI to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for such altered documentation. Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all express and any implied warranties for the associated TI product or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright  2002, Texas Instruments Incorporated