MCP16251 ONE-CELL BOOST
CONVERTER WITH EXTERNAL
UVLO CIRCUIT
2017 Microchip Technology Inc.
DS50002561A-page 11
Chapter 1. Product Overview
1.1
INTRODUCTION
This chapter provides an overview of the MCP16251 One-Cell Boost Converter with
External UVLO Circuit and covers the following topics:
•
MCP16251 Device Short Overview
•
MCP16251 Device Features
•
What is the MCP16251 One-Cell Boost Converter with External UVLO Circuit?
•
What Does the MCP16251 One-Cell Boost Converter with External UVLO Circuit
Kit Contain?
1.2
MCP16251 DEVICE SHORT OVERVIEW
Microchip’s MCP16251 device is a compact, high-efficiency, fixed-frequency,
synchronous step-up DC-DC Converter. The very low quiescent current makes it ideal
for battery-powered applications. Furthermore, the device provides a true output
disconnect feature while in shutdown (EN = GND). The MCP16251 device consumes
less than 0.6 µA from the battery when in the shutdown state.
The MCP16251 automatically selects the best operating mode for efficiency:
Pulse-Width Modulation (PWM) or Pulse-Frequency Modulation (PFM). The device
has a very low (4 µA) quiescent current (not switching, measured at output), a wide
input voltage range (0.35 to 5.5V) and a low start-up voltage (0.82V) at a
1 mA load current.
TABLE 1-1:
THE MICROCHIP FAMILY OF BOOST DEVICES
Parameter
MCP1623/4
MCP16251/2
MCP1640/B/C/D
MCP1642B/D
Mode
PWM Only
or
PWM/PFM
PWM/PFM
PWM Only
or
PWM/PFM
PWM Only
Start-up Voltage
0.65V
0.82V
0.65V
0.65V
Input Voltage
0.35V-5.5V
0.35V-5.5V
0.35V-5.5V
0.35V-5.5V
Peak Switch Current
425 mA
650 mA
850 mA
1.8A
Quiescent Current
19 µA
4 µA
19 µA
500 µA
V
OUT
Accuracy
±7.4%
±3%
±3%
±3%
Switching Frequency
370-630 kHz
500 kHz
500 kHz
1 MHz
Shutdown
True Load
Disconnect
Input to Output Bypass
or True Load
Disconnect
Input to Output
Bypass or True Load
Disconnect
Input to Output
Bypass or True Load
Disconnect
Packages
6-Lead SOT-23
6-Lead SOT-23
6-Lead SOT-23
8-Lead MSOP
8-Lead 2 x 3 DFN
8-Lead 2 x 3 DFN
8-Lead 2 x 3 DFN
8-Lead 2 x 3 DFN
Key Attributes
Lowest Cost
Lowest Quiescent
Current, Energy Saving
Highest Performance
Highest Output
Current
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