LMZ10500 NSC | Alldatasheet
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October 5, 2011 650mA SIMPLE SWITCHER® Nano Module with 5.5V Maximum Input Voltage
8 Pin LLP-Footprint Package
■ Up to 650mA output current ■ Input voltage range 2.7V to 5.5V ■ Output voltage range 0.6V to 3.6V ■ Efficiency up to 95% Key Features ■ Integrated inductor ■ Miniature form factor (3.0 mm x 2.5 mm x 1.2 mm) ■ 8-pin LLP footprint ■ -40°C to 125°C junction temperature range ■ Adjustable output voltage ■ 2.0MHz fixed PWM switching frequency ■ Integrated compensation ■ Soft start function ■ Current limit protection ■ Thermal shutdown protection ■ Input voltage UVLO for power-up, power-down, and brown-out conditions ■ Only 5 external components — resistor divider and 3 ceramic capacitors
Applications
■ Point of load conversions from 3.3V and 5V rails ■ Space constrained applications ■ Low output noise applications Performance Benefits ■ Small solution size ■ Low output voltage ripple ■ Easy component selection and simple PCB layout ■ High efficiency reduces system heat generation System Performance (Quick Overview Links: VOUT = 1.2V, 1.8V, 2.5V, 3.3V) Typical Efficiency at VIN = 3.6V 100EFFICIENCY (%) LOAD CURRENT (A) VOUT = 1.2VVOUT = 1.8VVOUT = 2.5VVOUT = 3.3V 30161630 Output Voltage Ripple VIN = 5.0V, VOUT = 1.8V, IOUT = 650mA 30161633 Radiated EMI (CISPR22) VIN = 5.0V, VOUT = 1.8V, IOUT = 650mA 0 200 400 600 800 10000 80RADIATED EMISSIONS (dBμV/m) FREQUENCY (MHz) EmissionsCISPR 22 Class B LimitCISPR 22 Class A Limit 30161632 © 2011 National Semiconductor Corporation 301616 www.national.com 650mA SIMPLE SWITCHER® Nano Module with 5.5V Maximum Input Voltage
Order Number Package Marking (Note) Supplied As LMZ10500SEE XVS SX 250 units, Tape-and-Reel LMZ10500SE XVS SX 1000 units, Tape-and-Reel LMZ10500SEX XVS SX 3000 units, Tape-and-Reel Note: The actual physical placement of the package marking will vary from part to part. The package marking “X” designates the date code. “V” is a NSC internal code for die traceability. Both will vary in production. “S” designates device type as switcher and “SX” identifies the device (part number). Pin Descriptions Pin # Name Description 1 EN Enable Input. Set this digital input higher than 1.2V for normal operation. For shutdown, set low. Pin is internally pulled up to VIN and can be left floating for always-on operation. 2 VCON Output voltage control pin. Connect to analog voltage from resisitve divider or DAC/controller to set the VOUT voltage. VOUT = 2.5 x VCON. Connect a small (470pF) capacitor from this pin to SGND to provide noise filtering. 3 FB Feedback of the error amplifier. Connect directly to output capacitor to sense VOUT. 4 SGND Ground for analog and control circuitry. Connect to PGND at a single point. 5 VOUT Output Voltage. Connected to one terminal of the integrated inductor. Connect output filter capacitor between VOUT and PGND. 6 PGND Power ground for the power MOSFETs and gate-drive circuitry. 7 VIN Voltage supply input. Connect ceramic capacitor between VIN and PGND as close as possible to these two pins. Typical capacitor values are between 4.7µF and 22µF. 8 VREF 2.35V voltage reference output. Typically connected to VCON pin through a resistive divider to set the output voltage. PAD The 3 pads underneath the module are not internally connected to any node. These pads should be connected to the ground plane for improved thermal performance. www.national.com 2 LMZ10500
Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VIN, VREF to SGND −0.2V to +6.0V PGND to SGND −0.2V to +0.2V EN, FB, VCON (SGND −0.2V) to (VIN +0.2V) w/6.0V max VOUT (PGND −0.2V) to (VIN +0.2V) w/6.0V max Junction Temperature (TJ-MAX) +150°C Storage Temperature Range −65°C to +150°C Maximum Lead Temperature +260°C ESD Susceptibility(Note 2) ±2kV Operating Ratings (Note 1) Input Voltage Range 2.7V to 5.5V Recommended Load Current 0 mA to 650mA Junction Temperature (TJ) Range −40°C to +125°C Thermal Properties Junction-to-Ambient Thermal 120°C/W Resistance (θJA), SE08A Package (Note 3) Electrical Characteristics (Note 4) Specifications with standard typeface are for TJ = 25°C only; Limits in bold face type apply over the operating junction temperature range TJ of -40°C to 125°C. Minimum and maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: VIN = 3.6V, VEN = 1.2V. Symbol Parameter Conditions Min (Note 4) Typ (Note 5) Max (Note 4) Units SYSTEM PARAMETERS VREF x GAIN Reference voltage x VCON to FB Gain VINUVLO VIN rising threshold 2.4 V VINUVLO VIN falling theshold 2.25 V ISHDN Shutdown supply current VIN = 3.6V, VEN = 0.5V (Note 6) 11 18 µA Iq DC bias current into VIN VIN = 5.5V, VCON = 1.6V, IOUT = 0A 6.5 8.5 mA RDROPOUT VIN to VOUTresistance IOUT = 200 mA 285 425 mΩ I LIM DC Output Current Limit VCON = 0.24V (Note 7) 800 1000 mA FOSC Internal oscillator frequency 1.75 2.0 2.25 MHz VIH,ENABLE Enable logic HIGH voltage 1.2 V VIL,ENABLE Enable logic LOW voltage 0.5 V TSD Thermal shutdown Rising Threshold 150 °C TSD-HYST Thermal shutdown hysteresis 20 °C DMAX Maximum duty cycle 100 % TON-MIN Minimum on-time 50 ns θJA Package Thermal Resistance 20mm x 20mm board 2 layers, 2 oz copper, 0.5W, no airlow 118 °C/W 15mm x 15mm board 2 layers, 2 oz copper, 0.5W, no airlow 132 10mm x 10mm board 2 layers, 2 oz copper, 0.5W, no airlow 157 3 www.national.com LMZ10500
System Characteristics The following specifications are guaranteed by design providing the component values in the Typical Application Circuit are used (CIN = COUT = 10 µF, 6.3V, 0603, TDK C1608X5R0J106K). These parameters are not guaranteed by production testing. Unless otherwise stated the following conditions apply: TA = 25°C. Symbol Parameter Conditions Min Typ Max Units ΔVOUT/VOUT Output Voltage Regulation Over Line Voltage and Load Current VOUT = 0.6V ΔVIN =2.7V to 4.2V ΔIOUT = 0A to 650mA ±1.23 % ΔVOUT/VOUT Output Voltage Regulation Over Line Voltage and Load Current VOUT = 1.5V ΔVIN = 2.7V to 5.5V ΔIOUT = 0A to 650mA ±0.56 % ΔVOUT/VOUT Output Voltage Regulation Over Line Voltage and Load Current VOUT = 3.6V ΔVIN = 4.0V to 5.5V ΔIOUT = 0A to 650 mA ±0.24 % VREF TRISE Rise time of reference voltage EN = Low to High, VIN = 4.2V VOUT = 2.7V, IOUT = 650 mA 10 µs η Peak Efficiency VIN = 5.0V, VOUT = 3.3V IOUT = 200 mA 95 %Full Load Efficiency VIN = 5.0V, VOUT = 3.6V IOUT = 650 mA 93 VOUT Ripple Output voltage ripple VIN = 5.0V, VOUT = 1.8V IOUT = 650 mA (Note 8) 8 mV pk-pk Line Transient Line transient response VIN = 2.7V to 5.5V, TR = TF= 10 µs, VOUT = 1.8V, IOUT = 650 mA 25 mV pk-pk Load Transient Load transient response VIN = 5.0V TR = TF = 40 µs, VOUT = 1.8V IOUT = 65mA to 650mA 25 mV pk-pk www.national.com 4 LMZ10500
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: The human body model is a 100pF capacitor discharged through a 1.5 kΩ resistor into each pin. Test method is per JESD-22-114. Note 3: Junction-to-ambient thermal resistance (θJA) is based on 4 layer board thermal measurements, performed under the conditions and guidelines set forth in the JEDEC standards JESD51-1 to JESD51-11. θJA varies with PCB copper area, power dissipation, and airflow. Note 4: Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL). Note 5: Typical numbers are at 25°C and represent the most likely parametric norm. Note 6: Shutdown current includes leakage current of the high side PFET. Note 7: Current limit is built-in, fixed, and not adjustable. Note 8: Ripple voltage should be measured across COUT on a well-designed PC board using the suggested capacitors. 5 www.national.com LMZ10500
Typical Performance Characteristics Unless otherwise specified the following conditions apply: VIN = 3.6V, TA = 25°C Dropout Voltage vs Load Current and Input Voltage 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35DROPOUT VOLTAGE (V) LOAD CURRENT (A) VIN = 2.7VVIN = 3.3VVIN = 3.6VVIN = 4.0V 30161649 Thermal Derating VOUT = 1.2V, θJA = 120°C/W 60 70 80 90 100 110 120 130 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7OUTPUT CURRENT (A) AMBIENT TEMPERATURE (°C) VIN = 3.3VVIN = 3.6VVIN = 5.0VVIN = 5.5V 30161644 Thermal Derating VOUT = 1.8V, θJA = 120°C/W 60 70 80 90 100 110 120 130 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7OUTPUT CURRENT (A) AMBIENT TEMPERATURE (°C) VIN = 3.3VVIN = 3.6VVIN = 5.0VVIN = 5.5V 30161643 Thermal Derating VOUT = 2.5V, θJA = 120°C/W 60 70 80 90 100 110 120 130 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7OUTPUT CURRENT (A) AMBIENT TEMPERATURE (°C) VIN = 3.3VVIN = 3.6VVIN = 5.0VVIN = 5.5V 30161642 www.national.com 6 LMZ10500
Thermal Derating VOUT = 3.3V, θJA = 120°C/W 60 70 80 90 100 110 120 130 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7OUTPUT CURRENT (A) AMBIENT TEMPERATURE (°C) VIN = 4.0VVIN = 4.5VVIN = 5.0VVIN = 5.5V 30161641 Radiated EMI (CISPR22) VIN = 5.0V, VOUT = 1.8V, IOUT = 650mA Default evaluation board BOM 0 200 400 600 800 1000 80RADIATED EMISSIONS (dBμV/m) FREQUENCY (MHz) EmissionsCISPR 22 Class B LimitCISPR 22 Class A Limit 30161632 Conducted EMI VIN = 5.0V, VOUT = 1.8V, IOUT = 650mA Default evaluation board BOM with additional 1µH 1µF LC input filter 100m 1 10 100 80CONDUCTED EMISSIONS (dBμV) FREQUENCY (MHz) Conducted EmissionsCISPR 22 Quasi PeakCISPR 22 Average 30161650 Startup 30161634 7 www.national.com LMZ10500
1.2V Schematic VOUT = 1.2V 30161622 Efficiency VOUT = 1.2V 100EFFICIENCY (%) LOAD CURRENT (A) 30161627 Output Ripple VOUT = 1.2V 30161655 Load Transient VOUT = 1.2V 30161657 Line and Load Regulation VOUT = 1.2V 1.20 1.21 1.22 1.23 1.24OUTPUT VOLTAGE (V) LOAD CURRENT (A) 30161637 DC Current Limit VOUT = 1.2V 0.6 0.7 0.8 0.9 1.0 1.1DC CURRENT LIMIT (A) INPUT VOLTAGE (V) TA = 85°C 30161651 www.national.com 8 LMZ10500
1.8V Schematic VOUT = 1.8V 30161623 Efficiency VOUT = 1.8V 100EFFICIENCY (%) LOAD CURRENT (A) 30161626 Output Ripple VOUT = 1.8V 30161633 Load Transient VOUT = 1.8V 30161658 Line and Load Regulation VOUT = 1.8V 1.77 1.78 1.79 1.80 1.81OUTPUT VOLTAGE (V) LOAD CURRENT (A) 30161638 DC Current Limit VOUT = 1.8V 0.8 0.9 1.0 1.1 1.2 1.3DC CURRENT LIMIT (A) INPUT VOLTAGE (V) TA = 85°C 30161652 9 www.national.com LMZ10500
2.5V Schematic VOUT = 2.5V 30161624 Efficiency VOUT = 2.5V 100EFFICIENCY (%) LOAD CURRENT (A) VIN = 3.3VVIN = 3.6VVIN = 5.0VVIN = 5.5V 30161628 Output Ripple VOUT = 2.5V 30161646 Load Transient VOUT = 2.5V 30161647 Line and Load Regulation VOUT = 2.5V 2.50 2.50 2.51 2.52 2.53OUTPUT VOLTAGE (V) LOAD CURRENT (A) VIN = 3.3VVIN = 3.6VVIN = 5.0VVIN = 5.5V 30161639 DC Current Limit VOUT = 2.5V 0.8 0.9 1.0 1.1 1.2 1.3DC CURRENT LIMIT (A) INPUT VOLTAGE (V) TA = 85°C 30161653 www.national.com 10 LMZ10500
3.3V Schematic VOUT = 3.3V 30161625 Efficiency VOUT = 3.3V 100EFFICIENCY (%) LOAD CURRENT (A) 30161629 Output Ripple VOUT = 3.3V 30161656 Load Transient VOUT = 3.3V 30161659 Line and Load Regulation VOUT = 3.3V 3.24 3.26 3.28 3.30OUTPUT VOLTAGE (V) LOAD CURRENT (A) 30161640 DC Current Limit VOUT = 3.3V 0.6 0.7 0.8 0.9 1.0 1.1DC CURRENT LIMIT (A) INPUT VOLTAGE (V) TA = 85°C 30161654 11 www.national.com LMZ10500
FIGURE 1. Functional Block Diagram tween 0.6V and 3.6V by driving the V CON pin externally. protection, and thermal shutdown are also provided. to the average of the duty-cycle modulated rectangular signal. error signal and internal loop compensation is provided. controller remains in a low power standby state.
the shutdown mode all internal circuits are turned OFF. PGND during the switching transitions. NFET switch is -0.6A (typ.). Characteristics section for more information. steps until it reaches 2MHz at the final step of current limiting. ure and allows for a smooth VOUT ramp up. FIGURE 2. Startup behavior of current limit based The soft start rate is also limited by the V CON ramp up rate. the input supply when the output of the regulator is shorted. 230µs of non-switching a new startup sequence is initiated.
Application Information
FIGURE 5. Typical Application Circuit The LMZ10500 provides a fixed 2.35V V REF voltage output. where GAIN is 2.5V/V from VCON to VFB. The ideal product of GAIN x VREF = 5.875V. calculated using equation (5) below. VREF should not be greater than 30 µA. to 0V after fault conditions. use, compact solution with reduced EMI. tiple 4.7 µF or 2.2µF capacitors can also be considered. teristics are recommended for both input and output filters. reliability, and performance for space sensitive applications. may have even larger percentage drop in value with DC bias.
tance for proper startup for various output voltage settings. value of 1nF and the R T resistor value is less than 300k Ω. TABLE 1. Output Capacitance Range from the light source to avoid abnormal behavior.
Physical Dimensions inches (millimeters) unless otherwise noted www.national.com 18 LMZ10500
19 www.national.com LMZ10500
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