MCP1601 Product Overview Datasheet by Microchip Technology

View All Related Products | Download PDF Datasheet
W Power Management
Microchip Technology Inc. The Embedded Control Solutions Company®
MCP1601, 500 mA Synchronous Buck Regulator
The MCP1601, 500 mA synchronous buck regulator,
is a fully integrated DC-to-DC switching converter that
requires neither an external power transistor nor a
power diode for operation within its rated current range.
It is designed for down-converting standard battery and
bus voltages to the operational voltages required in
various systems. It has an adjustable output range of
0.9V to VIN and can be powered with an input voltage
range of 2.7V to 5.5V. Given this input range, the
MCP1601 is ideal for applications being powered with
a single cell Li-Ion, or two or three cell NiMH, NiCd or
alkaline batteries, as well as, from standard system
bus voltages such as 5.0V, 3.3V or 3.0V. Some typical
battery powered applications include: Cell Phones,
PDAs, Digital Cameras, and USB powered devices.
At the internally set PWM (Pulse Width Modulation)
frequency of 750 kHZ, the MCP1601 can exceed 92%
efficiency and deliver 500 mA of load current, while
using low profile surface mount inductors and ceramic
capacitors. Together these features minimize space,
cost and wasted power.
The MCP1601 has three operating modes; PWM for
normal medium-to-high load conditions, PFM (Pulse
Frequency Modulation) for light loads over extended
periods of time, and LDO (Low Drop-Out) mode for when
the input voltage approaches the output voltage and
the PWM duty cycle approaches 100%. In the latter
case, the buck switch transistor saturates and supplies
the maximum possible voltage to the load. Switching
between these modes is automatic and allows the
MCP1601 to operate at maximum efficiency over a wide
variation of line and load conditions.
Features:
Three Operating Modes: PWM, PFM and LDO
(100% duty cycle) auto Switching between modes
All Ceramic Capacitor Solution
Integrated Buck and Synchronous Switches
Continuous Output Current Capability of 500 mA
Input Voltage Range of 2.7V to 5.5V
Low Voltage Output Capability of 0.9V
Fixed Switching Frequency of 750 kHz
Capable of PWM external synchronization up
to 1.0 MHz
Over-temperature protection-on-chip
Integrated Under Voltage Lock-out
Integrated Soft-start Capability
Temperature Range of -40 °C to +85 °C
Available in a Small 8-pin MSOP Package
PGND
VOUT
LX
VIN
FB
1
2
3
4
8
7
6
5SYNC/PWM
Input
Voltage
2.7V - 4.2V
CIN
10 µF
10 µH
COUT
10 µF
R1
250k (for 1.8V)
R2
200k
Typical Application (2.7V to 4.2V)
IOUT = 0 mA
to 400 mA
COUT Range
10 µF to 47 µF
L Range
10 µH to 22 µH
C1
47 pF
VOUT Range
1.2V to 3.3V
AGND
SHDN
MCP1601
Microchip Technology Inc. • 2355 W. Chandler Blvd. • Chandler, AZ 85224-6199 • (480) 792-7200 • Fax (480) 792-9210
Additional Information:
Microchip’s web site: www.microchip.com
Microchip’s Technical Library CD-ROM, Order No. DS00161
Product Line Card, Order No. DS00148
Analog & Interface Families Data Book 2002, Order No. DS00207
2002 Technical Documentation Analog & Interface Product Families CD-ROM, Order No. DS51205
MCP1601 Data Sheet, DS21762
MCP1601 Evaluation Board User Guide, DS51315
Development Tools Support:
The MCP1601 Evaluation Board is designed to demonstrate the use of the MCP1601 Synchronous Buck Regulator
in a step-down, inductor-based DC-to-DC converter application. The MCP1601 Evaluation Board is constructed using
one silk screen layer and two 1 oz. metal wiring layers. The bottom metal wiring layer is a single ground plane which is
routed to partition the PGND high current return pin from the small signal AGND return pin on the MCP1601 device.
MCP1601 500 mA Synchronous Buck Regulator
Product
Switching
Frequency
VCC
Range
PWM, PFM, LDO
Operating Modes
SHDN
Current
(Typical)
Integrated
Soft-start
Under
Voltage
Lock-out
Operating
Temperature
Range
# of Pins/
Package
MCP1601 750 kHz 2.7V to 5.5V Yes 0.1 µA Yes Yes -40°C to +85°C 8MS
Package Key: MS = MSOP
Development Tools for Analog and Interface Products from Microchip
MCP1601 Evaluation Board Demonstrates the Use of the MCP1601 Synchronous Buck Regulator
FilterLab® Active Filter Software Design Tool
MCP1252/1253 Evaluation Board Kit Support the MCP1252-33X50, MCP1252-ADJ, MCP1253-33X50 and
MCP1253-ADJ Low Noise, Positive-regulated Charge Pump Devices
MCP2120/2150 Developer’s Kit Infrared Products Developer’s Kit
MCP2510 CAN Developer’s Kit MCP2510 CAN Evaluation/Development Tool
MCP250XX CAN I/O Expanders Developer’s Kit MCP250XX CAN Evaluation/Development Tool
MXDEV® 1 Analog Evaluation System: Evaluation Kit for MCP Devices
MCP3001/02 Evaluation Board
MCP3004/08 Evaluation Board
MCP3201/02 Evaluation Daughter Kit
MCP3204/08 Evaluation Daughter Kit
MCP41XXX/MCP42XXX Evaluation Daughter Kit
Evaluation Kit for 10-bit Analog-to-Digital Converters
Evaluation Kit for 10-bit Analog-to-Digital Converters
Analog-to-Digital Converter - Four Channel*
Analog-to-Digital Converter - Four Channel*
Digital Potentiometers Evaluation and Demonstration*
TC642 Demo Board Fan Control Module for TC64X Devices
TC642 Evaluation Kit Evaluation Kit for TC64X Fan Controllers
TC650 Demo Board Demo Board for TC650/TC651 Fan Control ICs
TC652 Demo Board Demo Board for TC652/TC653 Fan Control ICs
TC74 Demo Board Demo Board for TC74 Digital Thermal Sensor
*Note: Requires MXDEV® Analog Evaluation Kit.
Visit our web site at www.microchip.com for additional product information and your local sales office.
Information subject to change. The Microchip name and logo are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. The Embedded Control Solutions Company,
FilterLab and MXDEV are registered trademarks of Microchip Technology Inc. in the U.S.A. All other trademarks mentioned herein are property of their respective owners.
© 2003 Microchip Technology Inc. Printed in the U.S.A. All rights reserved. DS21763A 2/2003

Products related to this Datasheet

IC REG BUCK ADJ 500MA 8MSOP
Available Quantity: 756
Unit Price: 1.61
IC REG BUCK ADJ 0.5A SYNC 8MSOP
Available Quantity: 389
Unit Price: 1.61
IC REG BUCK ADJ 500MA 8MSOP
Available Quantity: 0
Unit Price: 1.455
EVAL BOARD FOR MCP1601
Available Quantity: 0
Unit Price: 0
IC REG BUCK ADJ 0.5A SYNC 8MSOP
Available Quantity: 389
Unit Price: 1.61
EVAL BOARD FOR MCP1601
Available Quantity: 0
Unit Price: 0