Datasheet ADP2370, ADP2371 (Analog Devices) - 8

ADP2370/ADP2371 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS BUCK OUTPUT
Using recommended inductor values, IOUT = 10 mA, CIN = COUT = 10 µF, automatic PSM/PWM mode, TA = 25°C, unless otherwise noted.
25 1.30 0.65 1.28 20 1.26 0.63 A) µ 600kHz ( 1.24 z) z) NT 15 1.22 0.61 1.2MHz Y (MH Y (MH C C CURRE 1.20 EN EN NT U U 10 1.18 0.59 CE EQ EQ S R R E F F 1.16 UI +125°C Q +85°C 5 +25°C 1.14 0.57 –5°C –40°C
003
1.12 0
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1.10 0.55 3 4 5 6 7 8 9 10 11 12 13 14 15 16 3 5 7 9 11 13 15
006
INPUT VOLTAGE (V) INPUT VOLTAGE (V)
09531- Figure 3. Quiescent Supply Current vs. Input Voltage, Nonswitching, Figure 6. Switching Frequency vs. Input Voltage, FPWM Mode Different Temperatures
800 3.40 +125°C +85°C 750 A) +25°C 3.35 µ –5°C ( –40°C NT 700 3.30 E (V) G A CURRE LT NT 650 O 3.25 CE T V S U E UI TP 0.1mA 600 3.20 Q 1mA OU M 5mA W 10mA P 50mA F 550 3.15 100mA 300mA
004
800mA 500
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3.10 3 4 5 6 7 8 9 10 11 12 13 14 15 –40 –5 25 85 125
007
INPUT VOLTAGE (V) TEMPERATURE (°C)
09531- Figure 4. FPWM Quiescent Supply Current vs. Input Voltage, Nonswitching, Figure 7. Output Voltage vs. Temperature, VOUT = 3.3 V, VIN = 7.3 V, Different Temperatures Different Loads
1.30 0.65 5.20 1.28 5.15 1.26 0.63 5.10 1.24 z) z) E (V) 5.05 1.22 600kHz 0.61 G (MH (MH A Y Y LT NC 1.20 NC O 5.00 UE 1.2MHz UE T V Q 1.18 0.59 Q U 4.95 0.1mA RE RE TP F F 1mA 1.16 OU 5mA 4.90 10mA 50mA 1.14 0.57 100mA 4.85 300mA 1.12 800mA 1.10 0.55 4.80 –45 –25 –5 15 35 55 75 95 115 135
005
–40 –5 25 85 125
008
TEMPERATURE (°C)
09531-
TEMPERATURE (°C)
09531- Figure 5. Switching Frequency vs. Temperature, FPWM Mode, VIN = 8 V Figure 8. Output Voltage vs. Temperature, VOUT = 5 V, VIN = 7.2 V, Different Loads Rev. D | Page 8 of 32 Document Outline Features Applications Typical Application Circuit General Description Table of Contents Revision History Specifications Recommended Specifications: Capacitors Absolute Maximum Ratings Thermal Data Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Buck Output Theory of Operation PWM Operation PSM Operation Features Descriptions Precision Enable Forced PWM or PWM/PSM Selection Quick Output Discharge (QOD) Function Short-Circuit Protection Undervoltage Lockout Thermal Protection Soft Start Current Limit 100% Duty Cycle Synchronizing Power Good Applications Information ADIsimPower Design Tool External Component Selection Selecting the Inductor Output Capacitor Input Capacitor Adjustable Output Voltage Programming Efficiency Power Switch Conduction Losses Inductor Losses Switching Losses Transition Losses Recommended Buck External Components Capacitor Selection Output Capacitor Input Bypass Capacitor Input and Output Capacitor Properties Thermal Considerations PCB Layout Considerations Packaging and Ordering Information Outline Dimensions Ordering Guide