ST1S09IPUR

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STMicroelectronics

2 A, 1.5 MHZ PWM STEP-DOWN SWITCHING REGULATOR WITH SYNCHRONOUS RECTIFICATION

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ST1S09IPUR

Active

STMicroelectronics

2 A, 1.5 MHZ PWM STEP-DOWN SWITCHING REGULATOR WITH SYNCHRONOUS RECTIFICATION

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Description Specifications Series Pricing CAD Documents

Description

General part information

ST1S09 Series

The ST1S09 is a step-down DC-DC converter optimized for powering low output voltage applications. It supplies a current in excess of 2 A over an input voltage range from 2.7 V to 6 V.

A high PWM switching frequency (1.5 MHz) allows the use of tiny surface-mount components.

Moreover, since the required synchronous rectifier is integrated, the number of the external components is reduced to minimum: a resistor divider, an inductor and two capacitors. The Power Good function continuously monitors the output voltage. An open drain Power Good flag is released when the output voltage is within regulation. In addition, 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 output current limited to prevent damages due to accidental short circuit. The ST1S09 is available in the DFN6 (3 x 3 mm) package.

Technical Specifications

Parameters and characteristics for this part

Specification	ST1S09IPUR

Current - Output	2 A
Frequency - Switching	1.5 MHz
Function	Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-30 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	6-VDFN Exposed Pad
Package Length	3 mm
Package Name	6-DFN
Package Width	3 mm
Synchronous Rectifier	Yes
Topology	Buck
Voltage - Input (Max)	6 V
Voltage - Input (Min)	2.7 V
Voltage - Output (Max)	5.22 V
Voltage - Output (Min/Fixed)	0.8 V

ST1S09 Series

Part	Operating Temperature (Max)	Operating Temperature (Min)	Mounting Type	Synchronous Rectifier	Package Width	Package Name	Package Length	Topology	Voltage - Input (Max)	Frequency - Switching	Voltage - Output (Min/Fixed)	Voltage - Output (Max)	Number of Outputs	Voltage - Input (Min)	Current - Output	Output Type	Function	Package / Case	Output Configuration
STMicroelectronics ST1S09IPUR	85 °C	-30 °C	Surface Mount	Yes	3 mm	6-DFN	3 mm	Buck	6 V	1.5 MHz	0.8 V	5.22 V	1	2.7 V	2 A	Adjustable	Step-Down	6-VDFN Exposed Pad	Positive
STMicroelectronics ST1S09PUR	85 °C	-30 °C	Surface Mount	Yes	3 mm	6-DFN	3 mm	Buck	6 V	1.5 MHz	0.8 V	5.22 V	1	2.7 V	2 A	Adjustable	Step-Down	6-VDFN Exposed Pad	Positive