(China (Mainland))
Product Summary
The max1844etp-tg074 pulse-width modulation (PWM) controller provides high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high-voltage batteries to generate low-voltage CPU core or chipset/RAM supplies in notebook computers. Applications are (1)Notebook Computers; (2)CPU Core Supplies; (3)Chipset/RAM Supplies as Low as 1V; (4)1.8V and 2.5V Supplies.
Parametrics
max1844etp-tg074 absolute maximum ratings: (1)V+ to GND : -0.3V to +28V; (2)VCC, VDD to GND : -0.3V to +6V; (3)OUT, PGOOD, SHDN to GND: -0.3V to +6V; (4)FB, ILIM, LATCH, OVP, REF, SKIP,; (5)TON, UVP to GND : -0.3V to (VCC + 0.3V); (6)BST to GND: -0.3V to +34V; (7)CS to GND: -6V to +30V; (8)DL to GND: -0.3V to (VDD + 0.3V); (9)DH to LX : -0.3V to (BST + 0.3V); (10)LX to BST: -6V to +0.3V; (11)REF Short Circuit to GND : Continuous; (12)Continuous Power Dissipation (TA = +70°C); (13)20-Pin QSOP (derate 9.1mW/°C above +70°C): 727mW; (14)20-Pin 5mm × 5mm QFN (derate 20.0mW/°C; (15)above +70°C): 1.60W; (16)Operating Temperature Range : -40°C to +85°C; (17)Junction Temperature: +150°C; (18)Storage Temperature Range : -65°C to +150°C; (19)Lead Temperature (soldering, 10s): +300°C.
Features
max1844etp-tg074 features: (1)Ultra-High Efficiency; (2)Accurate Current-Limit Option; (3)Quick-PWM with 100ns Load-Step Response; (4)1% VOUT Accuracy Over Line and Load; (5)1.8V/2.5V Fixed or 1V to 5.5V Adjustable Output Range; (6)2V to 28V Battery Input Range; (7)200/300/450/600kHz Switching Frequency; (8)Adjustable Overvoltage Protection; (9)Adjustable Undervoltage Protection; (10)1.7ms Digital Soft-Start; (11)Drives Large Synchronous-Rectifier FETs; (12)2V ±1% Reference Output; (13)Power-Good Window Comparator.
Diagrams
