http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf



  Microchip Technology Semiconductor Electronic Components Datasheet  


MCP1601

500 mA Synchronous BUCK Regulator


No Preview Available !

MCP1601 pdf
www.DataSheet4U.com
M
MCP1601
500 mA Synchronous BUCK Regulator
Features
• Input Range of 2.7V to 5.5V
• 3 Operating Modes: PWM, PFM and LDO
• Integrated BUCK and Synchronous Switches
• Ceramic or Electrolytic Input/Output Filtering
Capacitors
• 750 kHz Fixed Switching Frequency
• Oscillator Synchronization to 1 MHz PWM Mode
• Auto-Switching from PWM/PFM Operation
• 100% Duty Cycle Capable for Low Input Voltage
• 500 mA Continuous Output Current Capability
• Integrated Under-Voltage Lock-Out Protection
• Integrated Over-Temperature Protection
• Integrated Soft Start Circuitry
• Low Output Voltage Capability to 0.9V
• Temperature Range: -40°C to +85ºC
• Small 8-Pin MSOP Package
Applications
• Low Power Handheld CPUs and DSPs
• Cellular Phones
• Organizers and PDAs
• Digital Cameras
• +5V or +3.3V Distributed Voltages
• USB Powered Devices
Package Type
8-Pin MSOP
VIN
SHDN
FB
AGND
18
27
MCP1601
36
45
LX
PGND
VOUT
SYNC/PWM
Description
The MCP1601 is a fully integrated synchronous BUCK
(step down) DC/DC converter for battery powered sys-
tems. With an input operating range of 2.7V to 5.5V, the
MCP1601 is ideal for applications being powered by
one single cell Li-Ion, 2 to 3 cell NiMH, NiCd or alkaline
sources. Output voltages can range from 0.9V to VIN to
accommodate a wide range of applications. Efficiency
can exceed 92% while operating at 750 kHz with load
current capability up to 500 mA. The MCP1601 is used
to minimize space, cost and wasted energy.
The PWM mode switching frequency is internally set to
a fixed 750 kHz allowing the use of low profile, surface
mount inductors and ceramic capacitors while
maintaining a typical efficiency of 92%.
The MCP1601 is capable of three distinct operating
modes: PWM, PFM and Low Drop Out.
When operating in PWM (pulse width modulation)
mode, the DC/DC converter switches at a single high
frequency determined by either the internal 750 kHz
oscillator or external synchronization frequency.
For applications that operate at very light to no load for
extended periods of time, the MCP1601 is capable of
operating in PFM (pulse frequency modulation mode)
to reduce the number of switching cycles/sec and
consume less energy.
The third mode of operation (LDO mode) occurs when
the input voltage approaches the output voltage and the
BUCK duty cycle approaches 100%. The MCP1601 will
enter a low drop out mode and the high-side P-Channel
BUCK switch will saturate, providing the output with the
maximum voltage possible.
The MCP1601 has integrated over-current protection,
over-temperature protection and UVLO (Under Voltage
Lockout) to provide for a fail safe solution with no
external components.
The MCP1601 is available in the 8-pin MSOP package,
with an operating temperature range of -40°C to +85°C.
2003 Microchip Technology Inc.
DS21762A-page 1



No Preview Available !

MCP1601 pdf
MCP1601www.DataSheet4U.com
Typical Application
Input
Voltage
2.7V-4.2V
CIN
10 µF
Typical Application (2.7V to 4.2V)
MCP1601
1 VIN
2 SHDN
LX 8
PGND 7
L Range
10 µH to 22 µH
10 µH
3 FB
4 AGND
VOUT 6
SYNC/ 5
PWM
C1
47 pF
R1
250 k
(for 1.8V)
VOUT Range
1.2V to 3.3V
IOUT = 0 mA to 400 mA
COUT
10 µF
COUT Range
10 µF to 47 µF
R2
200 k
Functional Block Diagram
VIN
SHDN
FB
UVLO
Internal
Circuit
Enable
Enable Out
10 pF
800 k12 pF
RCOMP CCOMP
3 M
0.8V
-
EA
+
AGND
Feedforward Oscillator
K*VIN
Duty
Clamp
Cycle
Soft Start
Duty
+ Cycle
- Clamp
10% - 90%
SQW
AGND
AGND
ISENSEP
VREF -
PFM Mode
PFM Comparator Timing
+
VREF -
ISENSEN
VREF -
Internal
Band Gap
Reference
Buffered 0.8V Output
PWM Latch
R
+ VREF
-
ISENSEP
OUT
S
Inset
Timing
ISENSEN
VOUT
LX
PGND
PGND
SYNC/PWM
DS21762A-page 2
2003 Microchip Technology Inc.



Part Number MCP1601
Description 500 mA Synchronous BUCK Regulator
Maker Microchip Technology - Microchip Technology
Total Page 22 Pages
PDF Download
MCP1601 pdf
Download PDF File
MCP1601 pdf
View for Mobile




Featured Datasheets

Part Number Description Manufacturers PDF
MCP1601 500 mA Synchronous BUCK Regulator MCP1601
Microchip Technology
PDF
MCP1603 500 mA Synchronous Buck Regulator MCP1603
Microchip Technology
PDF
MCP1612 1.4 MHz Synchronous Buck Regulator MCP1612
Microchip Technology
PDF
MCP1623 Low-Voltage Input Boost Regulator MCP1623
Microchip Technology
PDF
MCP1624 Low-Voltage Input Boost Regulator MCP1624
Microchip Technology
PDF
MCP16251 PFM/PWM Synchronous Boost Regulator MCP16251
Microchip
PDF


Part Number Start With

0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

site map

webmaste! click here

contact us

Buy Components