Datasheet ADP2147 (Analog Devices) - 7

ADP2147 3.5 350 +25°C –40°C 3.4 +85°C +125°C +25°C 300 +125°C 3.3 –40°C 3.2 ) 250 Hz M 3.1 ) ( Ω 200 3.0 (m NCY N O UE DS 150 Q 2.9 R RE F 2.8 100 2.7 50 2.6 2.5 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
10 0
2.3 2.8 3.3 3.8 4.3 4.8 5.3
036 5- 5-
IOUT (A)
988
INPUT VOLTAGE (V)
988 0 0 Figure 9. Frequency vs. Output Current, Across Temperature, Figure 12. RDSON PFET vs. Input Voltage, Across Temperature V OUT = 1.8 V
3.5 250 V –40°C IN = 2.3V 3.4 V +25°C IN = 3.6V +125°C V 3.3 IN = 4.2V 200 VIN = 5.5V 3.2 z) H ) M 3.1 150 ( Ω (m 3.0 NCY N O UE DS Q 2.9 R 100 RE F 2.8 2.7 50 2.6 2.5 0
7 1 03
0.1 0.2 0.3 0.4 0.5 0.6 0.7
1
2.3 2.8 3.3 3.8 4.3 4.8 5.3
0 5- 5- 88
I INPUT VOLTAGE (V) OUT (A)
988 09 0 Figure 10. Frequency vs. Output Current, Across Supply Voltage, Figure 13. RDSON NFET vs. Input Voltage, Across Temperature VOUT = 1.8 V
90 T IOUT = 100µA SW 80 IOUT = 25mA IOUT = 500mA 70 ) 4 V m 60 ( E G VOUT A 50 LT 1 O 40 V T U TP 30 OU IOUT 20 2 10 0 CH1 100mV CH2 250mA Ω M 40.0µs A CH2 215mA 2.3 2.8 3.3 3.8 4.3 4.8 5.3
034 014 5-
CH4 5.00V
85-
INPUT VOLTAGE (V)
988
T 2
0
6.00%
98 0 Figure 11. Output Voltage Ripple vs. Input Voltage, Figure 14. Response to Load Transient, 150 mA to 500 mA, Across Output Current, VOUT = 1.8 V VOUT = 1.8 V Rev. 0 | Page 7 of 16 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION TYPICAL APPLICATIONS CIRCUIT TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL DATA THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PWM MODE POWER SAVE MODE Power Save Mode Current Threshold ENABLE/SHUTDOWN SIMPLE DYNAMIC VOLTAGE SCALING (DVS) SHORT-CIRCUIT PROTECTION UNDERVOLTAGE LOCKOUT THERMAL PROTECTION SOFT START CURRENT LIMIT 100% DUTY OPERATION APPLICATIONS INFORMATION EXTERNAL COMPONENT SELECTION Inductor Output Capacitor THERMAL CONSIDERATIONS PCB LAYOUT GUIDELINES EVALUATION BOARD EVALUATION BOARD LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE