MCP1623_16 Datasheet, PDF (1/30 Pages) Microchip Technology – Low-Voltage Input Boost Regulator for PIC® Microcontrollers

MCP1623/24
Low-Voltage Input Boost Regulator
for PIC^® Microcontrollers
Features
• Up to 96% Typical Efficiency
• 425 mA Typical Peak Input Current Limit:
- I_OUT > 50 mA @ 1.2V V_IN, 3.3V V_OUT
- I_OUT > 175 mA @ 2.4V V_IN, 3.3V V_OUT
- I_OUT > 175 mA @ 3.3V V_IN, 5.0V V_OUT
• Low Start-Up Voltage: 0.65V, 3.3V V_OUT @ 1 mA
(typical)
• Low Operating Input Voltage: 0.35V, typical
3.3V_OUT @ 1 mA
• Adjustable Output Voltage Range: 2.0V to 5.5V
• Maximum Input Voltage  V_OUT < 5.5V
• Automatic PFM/PWM Operation (MCP1624)
• PWM-Only Operation (MCP1623)
• PWM Operation: 500 kHz
• Low Device Quiescent Current: 19 µA, typical
PFM Mode
• Internal Synchronous Rectifier
• Internal Compensation
• Inrush Current Limiting and Internal Soft Start
• True Load Disconnect
• Shutdown Current (All States): <1 µA
• Low Noise, Anti-Ringing Control
• Overtemperature Protection
• Available Packages:
- 6-Lead SOT-23
- 8-Lead 2 x 3 DFN
Applications
• One, Two and Three-Cell Alkaline and NiMH/NiCd
Low-Power PIC^® Microcontroller Applications
General Description
The MCP1623/24 is a compact, high-efficiency,
fixed-frequency, synchronous step-up DC-DC
converter. It provides an easy-to-use power supply
solution for PIC^® microcontroller applications powered
by either single-cell, two-cell, or three-cell alkaline,
NiCd, NiMH, and single-cell Li-Ion or Li-Polymer
batteries.
Low-voltage technology allows the regulator to start up
without high inrush current or output voltage overshoot
from a low 0.65V 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. For standby
applications, the MCP1624 operates and consumes
only 19 µA while operating at no load.
A “true” Load Disconnect mode provides input to output
isolation while disabled (EN = GND) by removing the
normal boost regulator diode path from input to output.
This mode consumes less than 1 µA of input current.
Output voltage is set by a small external resistor
divider.
Package Types
MCP1623/24
6-Lead SOT-23
SW 1
6 ^VIN
GND 2
5 ^VOUT
EN 3
4 V_FB
MCP1623/24
2x3 DFN*
V_{FB 1}
8 ^V_IN
S_{GND 2 EP 7} V_OUTS
P_{GND 3} ⁹ ₆ V_OUTP
EN 4
5 SW
* Includes Exposed Thermal Pad (EP); see Table 3-1.
 2010-2016 Microchip Technology Inc.
DS40001420D-page 1