Datasheet ADP1740, ADP1741 (Analog Devices) - 9
| Manufacturer | Analog Devices |
| Description | 2 A, Low VIN, Dropout, CMOS Linear Regulator |
| Pages / Page | 20 / 9 — Data Sheet. ADP1740/ADP1741. LOAD = 2A. VIN. –10. LOAD = 1.2A LOAD = … |
| Revision | H |
| File Format / Size | PDF / 776 Kb |
| Document Language | English |
Data Sheet. ADP1740/ADP1741. LOAD = 2A. VIN. –10. LOAD = 1.2A LOAD = 800mA. –20. LOAD = 400mA LOAD = 100mA. –30
Model Line for this Datasheet
Text Version of Document
Data Sheet ADP1740/ADP1741 0 T LOAD = 2A VIN –10 LOAD = 1.2A LOAD = 800mA –20 LOAD = 400mA LOAD = 100mA –30 3V TO 3.5V INPUT VOLTAGE STEP, 2V/µs LOAD = 10mA –40 B) d –50 V RR ( OUT S P –60 2 5mV/DIV –70 –80 VOUT = 1.5V –90 CIN = COUT = 4.7µF 1 –100
017
CH1 500mV B 10 100 1k 10k 100k 1M 10M
020
W CH2 5mV BW M10µs A CH4 800mV T 9.40% FREQUENCY (Hz)
07081- 07081- Figure 17. Line Transient Response, Load Current = 2 A Figure 20. Power Supply Rejection Ratio vs. Frequency, VOUT = 0.75 V, VIN = 1.75 V
70 0 LOAD = 2A 2.5V –10 LOAD = 1.2A 60 LOAD = 800mA –20 LOAD = 400mA 50 LOAD = 100mA –30 LOAD = 10mA –40 rms) 40 1.5V B) V d µ ( –50 E RR ( 30 IS S P –60 NO 20 0.75V –70 –80 10 –90 0 –100 0.0001 0.001 0.01 0.1 1 10
018
10 100 1k 10k 100k 1M 10M
021
LOAD CURRENT (A) FREQUENCY (Hz)
07081- 07081- Figure 18. Noise vs. Load Current and Output Voltage Figure 21. Power Supply Rejection Ratio vs. Frequency, VOUT = 1.5 V, VIN = 2.5 V
10 0 LOAD = 2A –10 LOAD = 1.2A z) LOAD = 800mA H –20 V/ LOAD = 400mA –30 LOAD = 100mA Y (µ 1 T LOAD = 10mA SI –40 B) EN d D L –50 1.5V A RR ( R S T 2.5V P –60 0.1 –70 ISE SPEC –80 O 0.75V N –90 0.01 –100 10 100 1k 10k 100k
019
10 100 1k 10k 100k 1M 10M
022
FREQUENCY (Hz) FREQUENCY (Hz)
07081- 07081- Figure 19. Noise Spectral Density vs. Output Voltage, ILOAD = 10 mA Figure 22. Power Supply Rejection Ratio vs. Frequency, VOUT = 2.5 V, VIN = 3.5 V Rev. H | Page 9 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION SOFT START FUNCTION ADJUSTABLE OUTPUT VOLTAGE (ADP1741) ENABLE FEATURE POWER-GOOD FEATURE REVERSE CURRENT PROTECTION FEATURE APPLICATIONS INFORMATION CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties UNDERVOLTAGE LOCKOUT CURRENT-LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE
017
CH1 500mV B 10 100 1k 10k 100k 1M 10M
020
W CH2 5mV BW M10µs A CH4 800mV T 9.40% FREQUENCY (Hz)
07081- 07081- Figure 17. Line Transient Response, Load Current = 2 A Figure 20. Power Supply Rejection Ratio vs. Frequency, VOUT = 0.75 V, VIN = 1.75 V
70 0 LOAD = 2A 2.5V –10 LOAD = 1.2A 60 LOAD = 800mA –20 LOAD = 400mA 50 LOAD = 100mA –30 LOAD = 10mA –40 rms) 40 1.5V B) V d µ ( –50 E RR ( 30 IS S P –60 NO 20 0.75V –70 –80 10 –90 0 –100 0.0001 0.001 0.01 0.1 1 10
018
10 100 1k 10k 100k 1M 10M
021
LOAD CURRENT (A) FREQUENCY (Hz)
07081- 07081- Figure 18. Noise vs. Load Current and Output Voltage Figure 21. Power Supply Rejection Ratio vs. Frequency, VOUT = 1.5 V, VIN = 2.5 V
10 0 LOAD = 2A –10 LOAD = 1.2A z) LOAD = 800mA H –20 V/ LOAD = 400mA –30 LOAD = 100mA Y (µ 1 T LOAD = 10mA SI –40 B) EN d D L –50 1.5V A RR ( R S T 2.5V P –60 0.1 –70 ISE SPEC –80 O 0.75V N –90 0.01 –100 10 100 1k 10k 100k
019
10 100 1k 10k 100k 1M 10M
022
FREQUENCY (Hz) FREQUENCY (Hz)
07081- 07081- Figure 19. Noise Spectral Density vs. Output Voltage, ILOAD = 10 mA Figure 22. Power Supply Rejection Ratio vs. Frequency, VOUT = 2.5 V, VIN = 3.5 V Rev. H | Page 9 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUITS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION SOFT START FUNCTION ADJUSTABLE OUTPUT VOLTAGE (ADP1741) ENABLE FEATURE POWER-GOOD FEATURE REVERSE CURRENT PROTECTION FEATURE APPLICATIONS INFORMATION CAPACITOR SELECTION Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties UNDERVOLTAGE LOCKOUT CURRENT-LIMIT AND THERMAL OVERLOAD PROTECTION THERMAL CONSIDERATIONS PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE
