L6997S Step Down Controller for Low Voltage Operations

The device is a high efficient solution for networking dc/dc modules and mobile applications compatible with 3.3V bus and 5V bus.

It's able to regulate an output voltage as low as 0.6V. The constant on time topology assures fast load transient response. The embedded voltage feed-forward provides nearly constant switching frequency operation in spite of a wide input voltage range.

An integrator can be introduced in the control loop to reduce the static output voltage error.

The remote sensing improves the static and dynamic regulation, recovering the wires voltage drop.

Pulse skipping technique reduces power consumption at light loads. Drivers current capability allows output currents in excess of 20A

技术特性

FROM 3V TO 5.5V VCC RANGE
MINIMUM OUTPUT VOLTAGE AS LOW AS 0.6V
1V TO 35V INPUT VOLTAGE RANGE
CONSTANT ON TIME TOPOLOGY
VERY FAST LOAD TRANSIENTS
0.6V, ±1% VREF
SELECTABLE SINKING MODE
LOSSLESS CURRENT LIMIT, AVAILABLE ALSO IN SINKING MODE
REMOTE SENSING
OVP,UVP LATCHED PROTECTIONS
600µA TYP QUIESCENT CURRENT
POWER GOOD AND OVP SIGNALS
PULSE SKIPPING AT LIGTH LOADS
94% EFFICIENCY FROM 3.3V TO 2.5V

功能框图

L6997S 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
L6997STR	Active		1000	TSSOP 20	Tape And Reel		L6997STR
L6997S	Active		1000	TSSOP 20	Tube		L6997S

DATASHEET

描述	版本	大小
L6997S : DS3920: Step down controller for low voltage operations	1	494KB