Low Quiescent Current, PFM/PWM Synchronous Boost Regulator with True Output Disconnect or Input/Output Bypass Option

Topologie: Boost
Eingangsspannung (min.): 1.80 V
Eingangsspannung (max.): 5.50 V
Ausgang 1: 3.30 V / 0.080 A

Erstveröffentlichung am 27.03.2013, Version A vom


The MCP16251/2 is a compact, high-efficiency, fixed frequency, synchronous step-up DC-DC converter. This family of devices provides an easy-to-use power supply solution for applications powered by either one-cell, two-cell or three-cell alkaline, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries.A low-voltage technology allows the regulator to start up without high inrush current or output voltage overshoot from a low voltage input. High efficiency is accomplished by integrating the low-resistance N-Channel boost switch and synchronous P-Channel switch. All compensation and protection circuitry are integrated to minimize external components. MCP16251/2 operates and consumes less than 14 μA from battery, while operating at no load (VOUT = 3.3V, VIN = 1.5V). The devices provide a true disconnect from input to output (MCP16251) or an input-to-output bypass (MCP16252), while in shutdown (EN = GND). Both options consume less than 0.6 μA from battery.Output voltage is set by a small external resistor divider. Two package options, SOT-23-6 and 2 x 3 TDFN-8, are available


  • Up to 96% Typical Efficiency
  • 650mA Typical Peak Input Current Limit:•IOUT > 100 mA @ 3.3V VOUT, 1.2V VIN•IOUT > 250 mA @ 3.3V VOUT, 2.4V VIN•IOUT > 225 mA @ 5.0V VOUT, 3.3V VIN
  • Low Device Quiescent Current:•Output Quiescent Current: < 4 μA typical,device is not switching (VOUT > VIN, excluding feedback divider current)
  • Input Sleep Current: 1 μA
  • No Load Input Current: 14 μA typical
  • Shutdown Current: 0.6 μA typical
  • Low Start-up Voltage: 0.82V, 1 mA load
  • Low Operating Input Voltage: down to 0.35V
  • Adjustable Output Voltage Range: 1.8V to 5.5V
  • Maximum Input Voltage  VOUT < 5.5V
  • Automatic PFM/PWM Operation:•PWM Operation: 500 kHz•PFM Output Ripple: 150 mV typical
  • Feedback voltage: 1.23V
  • Internal Synchronous Rectifier
  • Internal Compensation
  • Inrush Current Limiting and Internal Soft Start (1.5 ms typical)
  • Selectable, Logic Controlled, Shutdown States:•True Load Disconnect Option (MCP16251)•Input to Output Bypass Option (MCP16252)
  • Anti-Ringing Control
  • Overtemperature Protection
  • Available Packages:•SOT-23-6•2x 3 8-Lead TDFN


  Artikel Nr. SPEC Produktserie L
IR 1
RDC typ.
RDC max.
RDC1 typ
RDC1 max.
fres 1
744043004 PDF WE-TPC SMT-Speicherdrossel 4.7 4.7 1.55 1.55 1.7 1.7 50 70 50 70 60 60