Datasheet LTC4012-3 (Analog Devices) - 7

LTC4012-3 Typical perForMance characTerisTics
(TA = 25°C unless otherwise noted. L = IHLP-2525 6.8µH) PWM Frequency PWM Frequency vs Duty Cycle vs Charge Current
600 600 ICHG = 750mA 500 500 BAT = 5V BAT = 12V 400 400 CLP = 15V 300 300 RSENSE = 33mΩ RIN = 3.01k 200 200 PWM FREQUENCY (kHz) CLP = 6V PWM FREQUENCY (kHz) 100 CLP = 12V 100 BAT = 14.5V CLP = 20V CLP = 25V 0 0 0 20 40 60 80 100 0 0.5 1.0 1.5 2.0 2.5 3.0 DUTY CYCLE (%) CHARGE CURRENT (A) 4012-3 G13 4012-3 G14
INFET Response Time to Battery Shutdown Current DCIN Short to Ground
25 VGS = 0V PFET VGS (1V/DIV) 20 DC1256-CLASS APPLICATION DCIN = 0V IDCIN, REVERSE 15 (5A/DIV) LTC4012-3, ALL PINS 0A 10 DCIN = 0V TIME (1µs/DIV) 4012-3 G16 BATTERY CURRENT (µA) DCIN = 15V 5 LTC4012-3, BAT PINS INFET = Si7423DN DCIN = 20V IOUT = <50mA VOUT = 12.3V 0 COUT = 0.27F 0 5 10 15 20 25 BATTERY VOLTAGE (V) 4012-3 G15 40123fb Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Test Circuits Operation Applications Information Package Description Revision History Typical Application Related Parts