- RS Stock No.:
- 188-9210
- Mfr. Part No.:
- ST1S40IPHR
- Brand:
- STMicroelectronics
- RS Stock No.:
- 188-9210
- Mfr. Part No.:
- ST1S40IPHR
- Brand:
- STMicroelectronics
Technical Reference
Legislation and Compliance
Product Details
The ST1S40 device is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. The 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 HSOP-8, VFQFPN 4 mm x 4 mm - 8 lead, and standard SO8 package.
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
Available in HSOP-8, VFQFPN4x4-8L, and SO8 packages
Applications
μP/ASIC/DSP/FPGA core and I/O supplies
Point of load for: STB, TVs, DVD
Optical storage, hard disk drive, printers, audio/graphic cards
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
Available in HSOP-8, VFQFPN4x4-8L, and SO8 packages
Applications
μP/ASIC/DSP/FPGA core and I/O supplies
Point of load for: STB, TVs, DVD
Optical storage, hard disk drive, printers, audio/graphic cards
Specifications
Attribute | Value |
---|---|
Regulator Type | Linear Voltage |
Maximum Output Current | 3A |
Number of Outputs | 1 |
Output Voltage | 0.8 → 1.8 V |
Line Regulation | 0.4 % |
Load Regulation | 0.5 Typ.) % |
Mounting Type | Surface Mount |
Quiescent Current | 15µA |
Package Type | HSOP |
Pin Count | 8 |
Output Type | Adjustable |
Dimensions | 5 x 4 x 1.55mm |
Maximum Operating Temperature | +150 °C |
Minimum Operating Temperature | -40 °C |
Maximum Input Voltage | 18 V |
Height | 1.55mm |
Minimum Input Voltage | 4 V |
Length | 5mm |
Width | 4mm |
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