TPS62120 15V, 75mA, 96% efficiency Step-Down Converter with DCS-Control | TI.com

TPS62120
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15V, 75mA, 96% efficiency Step-Down Converter with DCS-Control

 

Description

The TPS6212x device is a highly efficient synchronous step-down DC-DC converter optimized for low-power applications. The device supports up to 75-mA output current and allows the use of tiny external inductors and capacitors.

The wide operating input voltage range of 2 V to 15 V supports energy harvesting, battery powered and as well 9-V or 12-V line powered applications.

With its advanced hysteretic control scheme, the converter provides power save mode operation. At light loads the converter operates in pulse frequency modulation (PFM) mode and transitions automatically in pulse width modulation (PWM) mode at higher load currents. The power save mode maintains high efficiency over the entire load current range. The hysteretic control scheme is optimized for low output ripple voltage in PFM mode in order to reduce output noise to a minimum. The device consumes only 10-µA quiescent current from VIN in PFM mode operation.

In shutdown mode, the device is turned off.

An open-drain power good output is available in the TPS62120 and indicates once the output voltage is in regulation.

The TPS62120 has an additional SGND pin which is connected to GND during shutdown mode. This output can be used to discharge the output capacitor.

The TPS6212x operates over an free air temperature range of –40°C to 85°C. The TPS62120 is available in a small 8-pin SOT-23 package and the TPS62122 in a 2 mm × 2 mm 6-pin DFN package.

Features

  • Wide Input Voltage Range: 2 V to 15 V
  • Up to 96% Efficiency
  • Power Save Mode With 11-µA Quiescent Current
  • Output Current 75 mA
  • Output Voltage Range: 1.2 V to 5.5 V
  • Up to 800-kHz Switch Frequency
  • Synchronous Converter, No External Rectifier
  • Low Output Ripple Voltage
  • 100% Duty Cycle for Lowest Dropout
  • Small SOT 8-Pin (TPS62120) and 2-mm × 2-mm
    DFN 6-Pin (TPS62122) Package
  • Internal Soft Start
  • Power Good Open Drain Output (TPS62120)
  • Open-Drain Output for Output Discharge
    (TPS62120)
  • 2.5-V Rising and 1.85-V Falling UVLO Thresholds

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WEBENCH® Designer TPS62120

  Min   Max Range
Vin  V 2.0 to 15.0V
Vout  V 1.2 to 5.5V
Iout  A ≤ 0.075A
Ambient Temp  °C -40 to 85°C

Parametrics

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Part number Order 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) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
TPS62120 Order now 2     15     1.2     5.5     0.075     1     800     800     0.011     Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Constant on-time (COT)
DCS-Control    
100     -40 to 85     Catalog     SOT-23 | 8     Converter     8SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 8)    
TPS62122 Order now 2     15     1.2     5.5     0.075     1     800     800     0.011     Enable
Light Load Efficiency
Synchronous Rectification    
Constant on-time (COT)
DCS-Control    
100     -40 to 85     Catalog     WSON | 6     Converter     6WSON: 4 mm2: 2 x 2 (WSON | 6)