Product overview
Description
The ST1S40 is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. ST1S40 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.
The ST1S40 integrates a 95 mΩ high side switch and 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.
The peak current mode control with internal compensation delivers a very compact solution with a minimum component count.
The ST1S40 is available in VFQFPN 4 mm x 4 mm 8 lead package, HSOP-8 and standard SO-8 package.
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All features
- 3 A DC output current
- 4.0 V to 18 V input voltage
- Output voltage adjustable from 0.8 V
- 850 kHz switching frequency
- Internal soft-start
- Integrated 95 mΩ and 69 mΩ Power MOSFETs
- All ceramic capacitor
- Enable
- Cycle-by-cycle current limiting
- Current fold back short-circuit protection
- VFQFPN4x4-8L, HSOP-8, and SO-8 and packages
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STMicroelectronics - ST1S40
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| ST1S40IDR | Active Product is in volume production. | SO-8 | Industrial | Ecopack2 | - | - | |
| ST1S40IPHR | Active Product is in volume production. | PowerSO-8 | Industrial | Ecopack2 | - | - | |
| ST1S40IPUR | Active Product is in volume production. | DFN8 4x4 | Industrial | Ecopack2 | - | - |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ST1S40IPHR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| ST1S40IDR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| ST1S40IPUR | | | distributors No availability of distributors reported, please contact our sales office |
ST1S40IPHR Active
ST1S40IDR Active
ST1S40IPUR Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors