Microchip MCP16252 manual

Microchip MCP16252
9 · 1
PDF user manual
 · 32 pages
English
user manualMicrochip MCP16252
2013 - 2016 Microchip Technology Inc. DS20005173B-page 1

MCP16251/2

Features

Up to 96% Typical Efficiency
•650 mA Typical Peak Input Current Limit:
-I
OUT
> 100 mA @ 3.3V V
OUT
, 1.2V V
IN
-I
OUT
> 250 mA @ 3.3V V
OUT
, 2.4V V
IN
-I
OUT
> 225 mA @ 5.0V V
OUT
, 3.3V V
IN
Low Device Quiescent Current:
- Output Quiescent Current: < 4 µA typical,
device is not switching (V
OUT
> V
IN
,
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 V
OUT
< 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-Lead
- TDFN, 2 x 3 x 0.8 mm, 8-Lead

Package Types

Applications

One, Two and Three-Cell Alkaline and NiMH/NiCd
Portable Products
Solar Cell Applications
Personal Care and Medical Products
Bias for Status LEDs
Smartphones, MP3 Players, Digital Cameras
Remote Controllers, Portable Instruments
Wireless Sensors
Bluetooth Headsets
+3.3V to +5.0V Distributed Power Supply

General Description

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.
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 after start-up, while operating at no load
(V
OUT
= 3.3V, V
IN
= 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 shutdown 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-lead and
TDFN, 2 x 3 x 0.8 mm, 8-lead are available.
MCP16251/2
2x3x0.8 TDFN*
P
GND
S
GND
EN
V
OUTS
V
OUTP
1
2
3
4
8
7
6
5
SW
V
IN
V
FB
EP
9
4
1
2
3
6
V
IN
V
FB
SW
GND
EN
5
V
OUT
MCP16251/2
6-Lead SOT-23
* Includes Exposed Thermal Pad (EP); see Table 3-1.

Low Quiescent Current, PFM/PWM Synchronous Boost Regulator

with True Output Disconnect or Input/Output Bypass Option

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