4.5V to 17V Input, 1A Synchronous Step-Down Converter - TPS561201

TPS561201 (ACTIVE)

4.5V to 17V Input, 1A Synchronous Step-Down Converter



The TPS561201 and TPS561208 are simple, easy-to-use, 1-A synchronous step-down converters in SOT-23 package.

The devices are optimized to operate with minimum external component counts and also optimized to achieve low standby current.

These switch mode power supply (SMPS) devices employ D-CAP2 mode control providing a fast transient response and supporting both low equivalent series resistance (ESR) output capacitors such as specialty polymer and ultra-low ESR ceramic capacitors with no external compensation components.

The TPS561201 operates in pulse skip mode, which maintains high efficiency during light load operation. The TPS561201 and TPS561208 are available in a 6-pin 1.6 × 2.9 (mm) SOT (DDC) package and specified from –40°C to 125°C of junction temperature.


  • TPS561201 and TPS561208 1-A Converter Integrated 140-mΩ and 84-mΩ FETs
  • D-CAP2™ Mode Control With Fast Transient Response
  • Input Voltage Range: 4.5 V to 17 V
  • Output Voltage Range: 0.76 V to 7 V
  • Pulse-Skip Mode (TPS561201) or Continuous Current Mode (TPS561208)
  • 580-kHz Switching Frequency
  • Low Shutdown Current Less than 10 µA
  • 2% Feedback Voltage Accuracy (25°C)
  • Startup from Pre-Biased Output Voltage
  • Cycle-by-Cycle Overcurrent Limit
  • Hiccup-Mode Overcurrent Protection
  • Non-Latch UVP and TSD Protections
  • Fixed Soft-Start: 1.0 ms
  • Create a Custom Design Using the TPS56120x With the WEBENCH® Power Designer

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Parametrics Compare all products in Buck Converter (Integrated Switch)

Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Special Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Package Group
TPS561201 TPS562210A TPS563210A
4.5    4.5    4.5   
17    17    17   
0.76    0.76    0.76   
7    7    7   
1    2    3   
1    1    1   
580    650    650   
580    650    650   
0.4    0.23    0.19   
Light Load Efficiency
Synchronous Rectification   
Light Load Efficiency
Power Good
Synchronous Rectification   
Light Load Efficiency
Power Good
Synchronous Rectification   
D-CAP2    D-CAP2    D-CAP2   
80    80    80   
-40 to 85    -40 to 85    -40 to 85   
Catalog    Catalog    Catalog   
SOT-23-THIN    SOT-23-THIN    SOT-23-THIN   
New! Interactive Design
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WEBENCH® Designer TPS561201

  Min   Max Range
Vin  V 4.5 to 17.0V
Vout  V 0.77 to 7V
Iout  A ≤ 1A
Ambient Temp  °C -40 to 150°C

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