# DC-DC Converter S09, automatic Buck-Boost, 2.5–15V to 12V, 600mA

- Page: https://sigmanortec.ro/en/dc-dc-converter-s09-automatic-buck-boost-2515v-to-12v-600ma
- Price: 7.08 RON
- Availability: In stock; 1-2 zile
- Reference: 88296 · EAN: 5940781861931
- Category: Electronic components > Other Tension Modules
- Specifications: Dimensions: 19 x 14 x 4 mm; Type: automatic DC-DC buck-boost converter; Output voltage: 12 V DC; Operating temperature: -20 ~ 85 °C; Output current: 600 mA; Input voltage: 2.5-15 V DC; Operating frequency: up to 1.2 MHz; Mounting: SMD or pins with 2.54 mm pitch; Efficiency: up to 75%; Accuracy: ±0.1 V; Standby consumption: under 200 µA; Insulation: not galvanically isolated; Output ripple: under 50 mV
- Updated: 2026-10-27
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-11-11 01:49 (Europe/Bucharest)

## Description

Automatic DC-DC converter S09, maintains a fixed 12 V output regardless of whether the 2.5-15 VDC input is higher or lower, with up to 600 mA output current, 1.2 MHz switching frequency, standby consumption below 200 uA, and an EN pin for controlled shutdown, ideal for stable battery-powered supply of 12 V modules in compact projects.
The S09 module is an automatic DC-DC buck-boost converter that maintains a fixed 12 VDC output regardless of whether the input voltage is higher or lower than this value. It is a compact solution for reliably powering 12 VDC loads from variable-voltage sources, such as Li-ion batteries, lead-acid batteries, or other unstable sources, and is suitable for communication modules, digital radios, industrial motherboards, scale models and aircraft models, household appliances, automotive power supply, and monitoring systems.
The converter accepts an input voltage between 2.5 and 15 VDC and automatically switches between step-up and step-down mode to maintain 12 VDC at the output, with an accuracy of ±0.1 V. The operating frequency reaches 1.2 MHz, conversion efficiency can reach 75%, and output ripple is below 50 mV. The maximum output current is 600 mA, and the quiescent current is below 200 uA, making the module suitable for battery-powered applications where runtime matters.
Among the main features are the 5 connection pads VIN+, VIN-, EN, VOUT+ and VOUT-, the controlled shutdown function via the EN pin, and industrial-grade components for stable long-term operation. Power is supplied through the VIN+ and VIN- pads, with a voltage between 2.5 and 15 VDC, and the module is enabled through the EN pin, which must be driven high for operation, usually by direct connection to VIN+.
Specifications:
Input voltage: 2.5 - 15 VDC
Maximum output current: 600 mA
Output voltage: fixed 12 VDC, accuracy ±0.1 V
Converter type: automatic DC-DC step-up / step-down (buck-boost)
Operating frequency: up to 1.2 MHz
Quiescent current: below 200 uA
Conversion efficiency: up to 75%
Output ripple: below 50 mV
Start / stop control: EN pin (enable / shutdown)
Isolation: non-galvanically isolated between input and output
Operating temperature: -20 - 85 °C
Mounting: direct soldering onto SMD pads or pins with 2.54 mm pitch
Dimensions: 19 x 14 x 4 mm
Pinout:
Connector
Pin
Function
Input pad (VIN)
VIN+
Positive power input, 2.5 - 15 VDC
Input pad (VIN)
VIN-
Input ground (GND)
Control pad
EN
Module enable / shutdown, high level for operation
Output pad (VOUT)
VOUT+
Positive output, fixed 12 VDC
Output pad (VOUT)
VOUT-
Output ground (GND, common with input ground)
Usage:
Connect the power source to the VIN+ and VIN- pads, observing polarity, because the module does not have reverse polarity protection.
Connect the EN pin to VIN+ so that the module operates continuously whenever it is powered, or place a switch or transistor between VIN+ and EN to be able to stop and start the output on demand.
Do not leave the EN pin unconnected, because the module remains off or behaves unpredictably without a logic level applied to this pin.
Connect the 12 VDC load to the VOUT+ and VOUT- pads.
Do not apply more than 15 VDC to the input, to avoid damaging the module.
Before connecting the load, measure the voltage between VOUT+ and VOUT- with a multimeter to confirm that the output is 12 V, regardless of the input voltage applied between 2.5 and 15 VDC.
Keep in mind that when the input voltage is much lower than the output voltage, the module operates in step-up mode, and the current drawn from the source can be significantly higher than the current delivered at the output, so choose a source capable of supplying this current.
The module is mounted by directly soldering the SMD pads or by soldering pins with the standard 2.54 mm pitch, for connection to a breadboard or test board.
Dimension diagram: