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switching voltage regulators

Manufacturer's P/N: HT7718B SOT89
Show more information about the brand Holtek Semiconductor

DC/DC Step-Up Vin 0.7~6.0V, Vout=1.8V, 0.1A, 115kHz, 80%, PFM
Input voltage0.7V - 6.0V
Output voltage1.8V
Output current0.1
Standard packaging:
5000 pcs.

Minimum order:
5000 pcs.

Minimum batch:
0 pcs.

In stock:

5V/100mA PFM Asynchronous Step-up Converter

The HT77xxB series is a set of PFM step-up DC/DC converters with high efficiency and low ripple. The series features extremely low start-up voltage and high output voltage accuracy. They require only few external components to provide a fixed output voltage of 1.8V, 2.2V, 2.7V, 3.0V, 3.3V, 3.7V and 5.0V. CMOS technology ensures low supply current and makes them ideal for battery-operated applications powered from one or more cells.

The HT77xxB series consist of an oscillator, a PFM control circuit, a driver transistor, a reference voltage unit and a high speed comparator. They employ pulse frequency modulation (PFM) for minimum supply current and ripple at light output loading. These devices are available in space saving 3-pin SOT89, 3-pin SOT23 and 5-pin SOT23 packages. For the 5-pin SOT23 package, it also contains a chip enable function to reduce power consumption during shutdown mode.


  • low startup voltage: 0.85V (typical)
  • high efficiency up to 80%
  • ultra low no load input current
  • high output voltage accuracy: ±2.5%
  • fixed output voltage: 1.8V
  • ultra low shutdown current: 0.1uA (typical)
  • package type: SOT89-3 and SOT23-5


  • input voltage: 0.7V~6.0V
  • output voltage: 1.8V
  • output current: 0.1A
  • switching frequency: 115kHz
  • accuracy: VOUT±2.5%
  • shutdown current: 1.0μA
  • operationn current: 4μA
  • efficiency: 80%
  • mode: PFM
  • case: SOT89


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