Datasheet LTM4642 (Analog Devices) - 3

LTM4642
elecTrical characTerisTics The
l
denotes the specifications which apply over the full internal operating temperature range (Note 2), otherwise specifications are at TA = 25°C, VIN = 12V. Per typical application in Figure 27. Specified as each channel. (Note 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
ICPWR CPWR Bias Current CPWR = 12V, MODE = Continuous 20 mA IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT1 = 1.5V, Switching Continuous 25 mA VIN = 12V, VOUT2 = 1.5V, Switching Continuous 25 mA VIN = 20V, VOUT1 = 1.5V, Switching Continuous 22 mA VIN = 20V, VOUT2 = 1.5V, Switching Continuous 22 mA Shutdown, RUN = 0, VIN = 12V 10 µA IQ(VIN) Input Supply Bias Current VIN = 12V, VOUT = 1.5V, IOUT = 4A 0.6 A VIN = 20V, VOUT = 1.5V, IOUT = 4A 0.356 A DRVCC Internal VCC Voltage 6V < VIN < 20V, No Load 5 5.3 5.6 V IDRVCC(REG) DRVCC Load Regulation IDRVCC = 0 to 100mA –1.5 –3 % EXTVCC(HYS) EXTVCC Switchover Hysteresis 200 mV EXTVCC EXTVCC Switchover Voltage EXTVCC Ramping Positive 4.4 4.6 4.8 V
Output Specifications
IOUT1,2(DC) Output Continuous Current Range VIN = 12V, VOUT = 1.5V (Note 5) 0 4 A ΔVOUT1(LINE) Line Regulation Accuracy VOUT = 1.5V, VIN from 4.5V to 20V, l 0.1 0.2 % VOUT(NOM) IOUT = 0A For Each Output ΔVOUT2(LOAD) Load Regulation Accuracy For Each Output, VOUT = 1.5V, 0A to 4A (Note 5) V V l ±0.3 ±0.5 % OUT2(NOM) IN = 12V VOUT1,2(AC) Output Ripple Voltage IOUT = 0A, COUT = 100µF X5R Ceramic VIN = 12V, VOUT = 1.5V 15 mV VIN = 20V, VOUT = 1.5V 15 mV fS Output Ripple Voltage Frequency IOUT = 2A, VIN = 12V, VOUT = 1.5V, 800 kHz FREQ = 49.9k to Ground ΔVOUT(START) Turn-On Overshoot COUT = 100µF and 47µF X5R Ceramic, VOUT = 1.5V, IOUT = 0A VIN = 12V 10 mV VIN = 20V 10 mV tSTART Turn-On Time COUT = 100µF X5R and 47µF Ceramic, VOUT = 1.5V, IOUT = 0A Resistive Load, TRACK/SS = 10nF VIN = 12V 6 ms ΔVOUT(LS) Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load COUT = 100µF and 47µF X5R Ceramic, VOUT = 1.5V, VIN = 12V 50 mV tSETTLE Settling Time for Dynamic Load Load: 0% to 50% to 0% of Full Load Step COUT = 100µF and 47µF X5R Ceramic, VOUT = 1.5V, VIN = 12V 15 µs IOUT(PK) Output Current Limit COUT = 100µF and 47µF X5R Ceramic, VIN = 6V, VOUT = 1.5V 7 A VIN = 20V, VOUT = 1.5V 7 A
Control Section
VOUTS1(REG) Regulated Differential Feedback Sensed at Load Point with Resistive Divider l 0.592 0.6 0.608 V V – OUTS1-VOUTS IVOUTS1 VOUTS1 Input Bias Current (Note 4) ±5 ±25 nA I – – VOUTS VOUTS Input Bias Current (Note 4) –25 –50 nA IVFB2 VFB2 Input Bias Current (Note 4) –5 ±50 nA VFB2 Voltage at VFB2 Pin IOUT = 0A, VOUT = 2.5V l 0.592 0.6 0.608 V 4642fb For more information www.linear.com/LTM4642 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Package Photograph Design Resources Related Parts