ST1S12XX12 Synchronous rectification with inhibit, 0.7 A, 1.7 MHz fixed, step-down switching regulator

The ST1S12 is a step down DC-DC converter optimized for powering low-voltage digital cores in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause high heating of the application environment. It provides up to 0.7 A over an input voltage range of 2.5 V to 5.5 V. A high switching frequency (1.7 MHz) allows the use of tiny surface-mount components. In addition to the resistor divider to set the output voltage value, only an inductor and two capacitors are required. Moreover, a low output ripple is guaranteed by the current mode PWM topology and by the use of low ESR SMD ceramic capacitors. The device is thermally protected and the current is limited to prevent damage due to accidental short-circuit. The ST1S12 is available in the TSOT23-5L package

技术特性

Step-down current mode PWM (1.7 MHz) DC-DC converter
3% DC output voltage tolerance
Synchronous rectification
Fixed output voltage 1.2 V, 1.8 V, and ADJ (available on request 1.5 V, 2.5 V and 3.3 V)
Enable function
Internal soft start
Typical efficiency: > 90%
0.7 A output current capability
Not switching quiescent current: max 650 μA over temperature range
RDSONtyp. 250 mΩ and 400 mΩ
Uses tiny capacitors and inductors
Operative junction temp. -40 °C to 125 °C
Available in TSOT23-5L package

功能框图

ST1S12XX12 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
ST1S12G12R	Active		1000	TSOT23-5L	Tape And Reel		ST1S12G12R

DATASHEET

描述	版本	大小
ST1S12XX12 : DS5661: Synchronous rectification with enable, 0.7 A, 1.7 MHz fixed or adjustable step-down switching regulator in TSOT23-5L	5	326KB

APPLICATION NOTES

描述	版本	大小
AN2728: ST1S12 small synchronous buck converter	1	274KB

BOARDS AND TOOLS

型号	描述
STEVAL-ISA055V2	0.7 A / 3.3 V synchronous buck converter with enable function based on the ST1S12XX12
STEVAL-ISA055V1	0.7 A / 1.2 V synchronous buck converter with enable function based on the ST1S12XX12