LQH55DN4R7M03L

Q Minimum :
Shielding :
Termination Style : SMD/SMT
Tolerance : 20 %
Inductance : 4.7 uH
Operating Temperature Range : - 55 C to + 125 C
Self Resonant Frequency : 30 MHz
Maximum DC Resistance : 0.041 Ohms
Dimensions : 5 mm W x 5.7 mm L x 4.7 mm H
Package / Case : 2220 (5750 metric)
Maximum DC Current : 2700 mAmps


Description

The LQH55DN4R7M03L is a part number of LAAT1157 SwitchReg which is a member of AnalogicTech's Total Power Management IC (TPMIC) product family. Capable of up to 1.2A with internal MOSFETs, the current-mode controlled IC provides high efficiency over a wide operating range. Fully integrated compensation simplifies system design and lowers external parts count. The step-down switching converter is ideal for applications where fixed frequency and low ripple are required over the full range of load conditions. The AAT1157 is available in the Pb-free, 16-pin 3x3mm QFN package and is rated over the -40°C to +85°C temperature range.The 2.7V to 5.5V input voltage range makes the AAT1157 ideal for single-cell lithiumion/polymer battery applications. The device operates at a fixed 1MHz switching frequency across all load conditions.

The features of LQH55DN4R7M03L can be summarized as (1)VIN range: 2.7V to 5.5V; (2)Up to 95% efficiency; (3)110 m RDS(ON) internal switches; (4)<1A shutdown current; (5)1MHz buck switching frequency; (6)fixed or adjustable VOUT 0.8V; (7)integrated power switches; (8)current mode operation; (9)internal compensation; (10)stable with ceramic capacitors; (11)constant PWM operation for low output ripple; (12)internal soft start; (13)over-temperature protection; (14)current limit protection; (15)16-Pin QFN 3x3mm package; (16)-40°C to +85°C temperature range.

The absolute maximum ratings of LQH55DN4R7M03L are (1)VCC , VP VCC , V P to GND: 6V; (2)VLX LX to GND: -0.3 to VP + 0.3 V; (3)VFB FB to GND: -0.3 to VCC + 0.3 V; (4)VEN EN to GND: -0.3 to -6 V; (5)TJ operating junction temperature range: -40 to 150 °C; (6)VESD ESD rating 2 - HBM: 3000 V.