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1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940

Data Sheet

Sept. 2011 Rev. 2. 4 BCD Semiconductor Manufacturing Limited

General Description

The AZ2940 is a low dropout three-terminal regulator

with a typical dropout of 280mV at 1A output current.

The AZ2940 provides current limit and thermal shut-

down. On-chip thermal shutdown provides protection

against any combination of high current and ambient

temperature that would create excessive junction tem-

peratures.

The AZ2940 has 1.2V, 1.8V, 2.5V, 3.3V and 5.0V ver-

sions.

The AZ2940 series is available in the industry standard

TO-220-3, TO-263-3, TO-252-2 (1), TO-252-2 (3) and

SOT-223 power packages. (Detailed information

please refer to page 4)

Features

· Minimum Guaranteed Output Current: 1A

· Dropout Voltage at I

OUT

=1A: 280mV Typ.

(Except 1.2V and 1.8V Versions)

· Output Accuracy:

± 1%

· Low Ground Current

· Internal Current Limit and Thermal Protection

· Reversed-battery and Reversed-lead Insertion

Protection

· Fast Transient Response

Applications

· LCD TV

· Set Top Box

· LCD Monitor

· SMPS Post Regulator

· Laptop, Palmtop and Notebook

· Portable Instrumentation

· USB Power Supply

Figure 1. Package Types of AZ2940

TO-220-3 TO-263-3

TO-252-2 (1)

SOT-223

TO-252-2 (3)

Summary of content (22 pages)

PAGE 1
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR General Description Features The AZ2940 is a low dropout three-terminal regulator with a typical dropout of 280mV at 1A output current. · · The AZ2940 provides current limit and thermal shutdown. On-chip thermal shutdown provides protection against any combination of high current and ambient temperature that would create excessive junction temperatures. · · · · Minimum Guaranteed Output Current: 1A Dropout Voltage at IOUT=1A: 280mV Typ. (Except 1.
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Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Pin Configuration T Package (TO-220-3) S Package (TO-263-3) 3 VOUT 2 GND 1 VIN 3 VOUT 2 GND 1 VIN D Package (TO-252-2 (3)) (TO-252-2 (1)) 3 VOUT 3 VOUT 2 GND 2 GND 1 VIN 1 VIN H Package (SOT-223) 3 VOUT 2 GND 1 VIN Figure 2. Pin Configuration of AZ2940 (Top View) Sept. 2011 Rev. 2.
PAGE 3
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Pin Description Pin Number Pin Name Function 1 VIN Unregulated Input 2 GND Ground pin. This pin and TAB are internally connected 3 VOUT Regulated Output Functional Block Diagram VIN 1 VOUT 2 GND 16V 1.24V Reference 3 + - Thermal Shutdown Figure 3. Functional Block Diagram of AZ2940 Sept. 2011 Rev. 2.
PAGE 4
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Ordering Information - AZ2940 E1: Lead Free G1: Green Circuit Type TR: Tape and Reel Blank: Tube Package T: TO-220-3 S: TO-263-3 D: TO-252-2 (1)/TO-252-2 (3) H: SOT-223 Package TO-220-3 TO-263-3 TO-252-2 (1) /TO-252-2 (3) SOT-223 Temperature Range -40 to 125oC -40 to 125oC -40 to 125oC -40 to 125oC 1.2: Fixed Output 1.2V 1.8: Fixed Output 1.8V 2.5: Fixed Output 2.5V 3.3: Fixed Output 3.3V 5.0: Fixed Output 5.
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Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Absolute Maximum Ratings (Note 1) Parameter Input Voltage Operating Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10sec) Thermal Resistance Symbol Value Unit VIN 16 V TJ 150 oC TSTG -65 to 150 o C TLEAD 260 o C TO-220-3 60 TO-263-3 60 TO-252-2 (1)/TO-252-2 (3) 100 SOT-223 120 θJA o C/W ESD (Human Body Model) ESD 5000 V ESD (Machine Model) ESD 300 V Note 1: Stresses greater than those
PAGE 6
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Electrical Characteristics AZ2940-1.2 Electrical Characteristics Operating Conditions: VIN=2.5V, IOUT=10mA, CIN=10µF, COUT=10µF, TJ=25oC, unless otherwise specified. The Boldface applies over -40oC≤TJ≤125oC.
PAGE 7
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Electrical Characteristics AZ2940-1.8 Electrical Characteristics Operating Conditions: VIN=2.8V, IOUT=10mA, CIN=10µF, COUT=10µF, TJ=25oC, unless otherwise specified. The Boldface applies over -40oC≤TJ≤125oC. Parameter Symbol Output Voltage VOUT Line Regulation VRLINE Load Regulation VRLOAD Condition Min Typ Max IOUT=10mA 1.782 1.8 1.818 V 10mA≤IOUT≤1A, 2.8V≤VIN≤13.2V 1.764 1.8 1.836 V IOUT=10mA, 2.8V≤VIN≤13.2V 3.
PAGE 8
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Electrical Characteristics (Continued) AZ2940-2.5 Electrical Characteristics Operating Conditions: VIN=3.5V, IOUT=10mA, CIN=10µF, COUT=10µF, TJ=25oC, unless otherwise specified. The Boldface applies over -40oC≤TJ≤125oC. Parameter Symbol Condition Min Typ Max Unit IOUT=10mA 2.475 2.5 2.525 V 10mA≤IOUT≤1A, 3.5V≤VIN≤13.2V 2.45 2.5 2.55 V Output Voltage VOUT Line Regulation VRLINE IOUT=10mA, 3.5V≤VIN≤13.2V 5.
PAGE 9
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Electrical Characteristics (Continued) AZ2940-3.3 Electrical Characteristics Operating Conditions: VIN=4.3V, IOUT=10mA, CIN=10µF, COUT=10µF, TJ=25oC, unless otherwise specified. The Boldface applies over -40oC≤TJ≤125oC. Parameter Symbol Output Voltage VOUT Line Regulation VRLINE Load Regulation VRLOAD Output Voltage Temperature Coefficient Dropout Voltage (Note 4) ∆VOUT/∆T VDROP Condition Min Typ Max Unit IOUT=10mA 3.27 3.3 3.
PAGE 10
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Electrical Characteristics (Continued) AZ2940-5.0 Electrical Characteristics Operating Conditions: VIN=6V, IOUT=10mA, CIN=10µF, COUT=10µF, TJ=25oC, unless otherwise specified. The Boldface applies over -40oC≤TJ≤125oC. Parameter Symbol Output Voltage VOUT Line Regulation VRLINE Load Regulation VRLOAD Condition Min Typ Max Unit IOUT=10mA 4.95 5.0 5.05 V 10mA≤IOUT≤1A, 6V≤VIN≤13.2V 4.90 5.0 5.10 V IOUT=10mA, 6V≤VIN≤13.
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Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 5.020 5.0250 5.018 5.0225 5.016 5.0200 5.014 5.0175 Output Voltage (V) Output Voltage (V) Typical Performance Characteristics 5.012 5.010 AZ2940-5.0 5.008 5.006 5.004 IOUT=10mA 5.002 TJ=25 C 5.000 5.0150 5.0125 5.0100 5.0075 5.0050 VIN=6V 5.0025 TJ=25 C o o 5.0000 6 7 8 9 10 11 12 AZ2940-5.0 13 14 0 250 Input Voltage (V) Figure 4. Line Regulation 1000 20 22.5 VIN=6V 20.0 o 18 TJ=25 C 17.5 15.0 12.5 10.
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Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 500 0.37 450 0.36 400 0.35 Ground Current (mA) Dropout Voltage (mV) Typical Performance Characteristics (Continued) 350 300 AZ2940-5.0 250 200 150 0.33 AZ2940-5.0 0.32 0.31 0.30 0.29 TJ=25 C 50 0 IOUT=10mA 0.34 o 100 VIN=6V 0.28 0 250 500 750 0.27 1000 -25 0 75 100 125 Figure 9. Ground Current vs. Junction Temperature Figure 8. Dropout Voltage vs. Output Current 10.0 3.50 3.25 9.5 VIN=6V VIN=6V 9.
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Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 500 500 475 475 450 450 425 425 Dropout Voltage (mV) Dropout Voltage (mV) Typical Performance Characteristics (Continued) 400 375 350 325 AZ2940-5.0 300 275 250 375 350 -25 0 25 50 75 100 AZ2940-5.0 325 300 275 IOUT=1A 250 IOUT=750mA 225 200 400 225 200 125 -25 0 o 25 50 75 Junction Temperature ( C) Figure 13. Dropout Voltage vs. Junction Temperature 100 5.05 COUT=2.2µF 5.03 Output Capacitor ESR (Ω) 5.
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Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Typical Performance Characteristics (Continued) 0.4 ∆VOUT (0.2V/Div) 100 COUT=10µF O TA=25 C 0.1 Unstable Range 0.01 0 -0.2 Stable Range 1 IOUT (0.5A/Div) Output Capacitor ESR (Ω) VOUT=5V 10 0 200 400 600 800 1 0.5 0 -0.5 1000 Output Current (mA) Time (200µs/Div) Figure 17. Load Transient Figure 16. Output Capacitor ESR vs. Output Current 0.06 ∆VOUT (0.02V/Div) AZ2940-5.0 COUT=47µF 0.2 0 -0.2 ∆VIN (0.5V/Div) ∆VOUT (0.
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Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Typical Performance Characteristics (Continued) 50 50 40 Power Dissipation (W) Power Dissipation (W) 40 35 30 25 20 15 35 30 25 20 15 10 10 5 5 0 0 -25 0 25 50 75 100 Package:TO-252-2 (1)/TO-252-2 (3) 2 45*43mm Heatsink No Heatsink 45 Package:TO-220-3 2 45*43mm Heatsink No Heatsink 45 125 -25 0 25 50 75 100 125 o Case Temperature ( C) o Case Temperature ( C) Figure 21. Power Dissipation vs.
PAGE 16
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Typical Application 1 VIN VIN V OUT 3 VOUT AZ2940 + CIN + GND COUT 2 Figure 23. Typical Application of AZ2940 Note: CIN is required if regulator is located far from power supply filter and is recommended to be 0.47µF or greater. To maintain stability, COUT is recommended to be 2.2µF or greater. The ESR of this capacitor is critical, please see curve. Sept. 2011 Rev. 2.
PAGE 17
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Mechanical Dimensions TO-220-3 9. 660(0. 380) 10. 660(0. 420) 2.580(0.102) 3.380(0.133) 0. 550(0. 022) 1. 350(0. 053) 1.160(0. 046) 1.760(0. 069) 14.230(0.560) 16.510(0.650) φ1. 500(0. 059) 27.880(1.098) 30.280(1.192) 8.520(0.335) 9.520(0.375) 1.850(0.073) φ3. 560(0. 140) 4. 060(0. 160) Unit: mm(inch) 0. 200(0. 008) 7° 3. 560(0.140) 4. 820(0.190) 2.080(0. 082) 2.880(0. 113) 3° 7° 0. 381(0. 015) 60 ° 0. 813(0. 032) 8.763(0.
PAGE 18
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Mechanical Dimensions (Continued) TO-263-3 4.070(0.160) 4.820(0.190) Unit: mm(inch) 3° 9.650(0.380) 10.290(0.405) 8.840(0.348) 70° 7.420(0.292) 1.150(0.045) 1.390(0.055) 1.270(0.050) 1.390(0.055) 14.760(0.581) 15.740(0.620) 1.150(0.045) 1.390(0.055) 3° 0.510(0.020) 0.990(0.039) 2.540(0.100) 2.640(0.104) 2.700(0.106) 0.360(0.014) 0.400(0.016) 7° 2.200(0.087) 5.600(0.220) 0.020(0.001) 0.250(0.010) 2.390(0.094) 2.690(0.106) 8.640(0.
PAGE 19
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Mechanical Dimensions (Continued) SOT-223 Unit: mm(inch) 6.300(0.248) 6.700(0.264) ) 0.250(0.010 ) 14 .0 0.350(0 2.900(0.114) 3.100(0.122) 0.900(0.035) 3.700(0.146) 3.300(0.130) 7.300(0.287) 6.700(0.264) MIN 0.250(0.010) 1.750(0.069) TYP 2.300(0.091) 0.610(0.024) TYP 0.810(0.032) 4.500(0.177) 0° 10° 4.700(0.185) 0.020(0.001) 0.100(0.004) 1.500(0.059) 1.520(0.060) 1.700(0.067) 1.800(0.071) Sept. 2011 Rev. 2.
PAGE 20
Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Mechanical Dimensions (Continued) 1.350(0.053) 1.650(0.065) TO-252-2 (1) 6.450(0.254) 6.650(0.262) 5.200(0.205) 5.400(0.213) Unit: mm(inch) 2.200(0.087) 2.400(0.094) 0.450(0.018) 0.580(0.023) 4.300(0.169) 5.400(0.213) 5° 0.700(0.028) 0.900(0.035) 0.500(0.020) 0.700(0.028) 2.300TYP 4.500(0.177) 4.700(0.185) 1.400(0.055) 1.780(0.070) 5° 3° 4° 0.450(0.018) 0.580(0.023) Sept. 2011 Rev. 2. 4 4.800(0.189) 6.500(0.256) 3.800REF(0.150REF) 5.
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Data Sheet 1A ULTRA LOW DROPOUT LINEAR REGULATOR AZ2940 Mechanical Dimensions (Continued) 4.700REF 0.470(0.019) 0.600(0.024) 9 0.900(0.035) 1.100(0.043) 0 2.900REF 8 3 7 1.400(0.055) 1.700(0.067) 0.720(0.028) 0.850(0.033) 5 9.800(0.386) 10.40(0.409) 0.600(0.024) 1.000(0.039) 0.150(0.006) 0.750(0.030) 1.29±0.1 5.250REF 5.130(0.202) 5.460(0.215) 0.720(0.028) 0.900(0.035) 2.286(0.090) BSC Unit: mm(inch) 6.500(0.256) 6.700(0.264) 1.800REF 6.000(0.236) 6.200(0.244) 0.900(0.035) 1.250(0.
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BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein.