TPS62147, TPS62148 High-Accuracy, 3-V to 17-V, 2-A Step-Down Converter with DCS-Control
1 Features
- Output voltage accuracy ± 1% over specified TJ range (PWM mode)
- Input voltage range: 3 V to 17 V
- Quiescent current 18-µA typical
- Output voltage from 0.8 V to 12 V
- Adjustable soft start
- Forced PWM or PWM/PFM operation
- Switching frequency of 1.25 MHz or 2.5 MHz in forced PWM
- Precise ENABLE input allows
- User-defined undervoltage lockout
- Exact sequencing
- 100% duty cycle mode
- Automatic efficiency enhancement AEE
- DCS-Control topology
- Active output discharge (TPS62148)
- HICCUP overcurrent protection (TPS62147)
- Power-good output
- Available in 2-mm × 3-mm VQFN package
2 Applications
- Standard 12-V rail supplies
- Mobile and embedded computers
- POL supply from multiple batteries
- Factory automation, PLC, industrial PC
- Building automation, video surveillance
3 Description
The TPS62147 and TPS62148 are high efficiency and easy-to-use synchronous step-down DC/DC converters, based on the DCS-Control Topology. The wide input voltage range of 3-V to 17-V make the devices suitable for multi-cell Li-Ion as well as 12-V intermediate supply rails. The devices provide 2-A continuous output current. The devices automatically enter Power Save Mode at light loads to maintain high efficiency across the whole load range. With that, the devices are well suited for applications that require connected standby performance, like industrial PC and video surveillance. With the MODE pin set to low, the switching frequency is adapted automatically based on the output current and also on input and output voltage. This technique is called Automatic Efficiency Enhancement (AEE) and maintains high conversion efficiency over the whole operation range. TPS62147, TPS62148 provide a 1% output voltage accuracy in PWM mode and therefore enable the design of a power supply with high output voltage accuracy. The FSEL pin allows to set a switching frequency in forced PWM mode of 1.25 MHz or 2.5 MHz, respectively.
The typical quiescent current is 18 µA. In shutdown mode, the current is typically 1 µA.
The devices are available as an adjustable version, packaged in a 3-mm × 2-mm VQFN package.
| PART NUMBER(2) | PACKAGE(1) | BODY SIZE (NOM) |
|---|---|---|
| TPS62147 | RGX (VQFN, 11) | 3.00 mm × 2.00 mm |
| TPS62148 | 3.00 mm × 2.00 mm |
Simplified Schematic
Efficiency vs Output Current for Vo = 3.3 V;
fsw = 1.25 MHz; PFM4 Revision History
Changes from Revision A (January 2023) to Revision B (February 2023)
- Revision B expanded the listings shown in revision AGo
- Updated Figure 10-7 to the correct graphGo
Changes from Revision * (April 2018) to Revision A (January 2023)
- Updated the numbering format for tables, figures, and cross-references throughout the documentGo
- Removed trademarks from DCS-Control and AEE.Go
- Updated Absolute Maximum Ratings table noteGo
- Updated Figure 10-4 Efficiency vs Output current graph on page 20Go
- Updated Figure 10-8 Efficiency vs Output current graph on page 21Go
- Updated Figure 10-66 Switching Frequency vs Input Voltage graph on page 30Go
- Updated Figure 10-68 Switching Frequency vs Input Voltage graph on page 31Go
- Removed the graph “Switching Frequency vs Junction Temperature (Vout = 1.2 V, 1.8 V, PWM, FSEL= high)" on page 30Go
