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MCP1601 Datasheet(PDF) 3 Page - Microchip Technology

Part # MCP1601
Description  500 mA Synchronous BUCK Regulator
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP1601 Datasheet(HTML) 3 Page - Microchip Technology

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 2003-2013 Microchip Technology Inc.
DS21762B-page 3
MCP1601
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
VIN - AGND ......................................................................6.0V
SHDN, FB, SYNC/PWM, VOUT ..... (AGND-0.3V) to (VIN+0.3V)
LX to PGND................................................ -0.3V to (VIN+0.3V)
PGND to AGND .................................................. -0.3V to +0.3V
Output Short Circuit Current .................................continuous
Storage temperature .....................................-65°C to +150°C
Ambient Temp. with Power Applied ................-40°C to +85°C
Operating Junction Temperature...................-40°C to +125°C
ESD protection on all pins
4kV
† Notice: Stresses above those listed under “Maximum rat-
ings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
PIN FUNCTION TABLE
NAME
FUNCTION
VIN
Input Source Voltage
SHDN
Device Shutdown Pin
FB
Output Voltage Feedback Input
AGND
Analog Ground
VOUT
Sensed Output Voltage
SYNC/PWM
Synchronous Clock input or PWM/
PFM select
PGND
Power Ground
LX
Output Inductor Node
ELECTRICAL SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, VIN=4.2V, VOUT=1.8V, ILOAD = 10 mA, TA=-40°C to +85°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Power Input Requirements
Voltage
VIN
2.7
5.5
V
ILOAD = 0 mA to 500 mA
Shutdown Current
I(VIN)
0.05
1.0
µA
Shutdown Mode (SHDN = GND)
PFM Mode Current
I(VIN)
119
180
µA
SYNC/PWM = GND, PFM Mode
(ILOAD = 0 mA)
Oscillator Section
Internal Oscillator Frequency
FOSC
650
750
850
kHz
SYNC/PWM = VIN
External Oscillator Capture Range
FSYNC
850
1000
kHz
FSYNC > FOSC
External Oscillator Duty Cycle
FSYN-FALL
10
90
%
FSYNC = 1 MHz
Internal Power Switches
RDSon P-CHANNEL
RDSon-P
500
m
IP=100 mA, TA=+25°C, VIN=4.2V
RDSon N-CHANNEL
RDSon-N
500
m
IN=100 mA, TA=+25°C, VIN =4.2V
Dropout Voltage
VDROPOUT
250
mV
VOUT = 2.7V, ILOAD = 300 mA,
TA=+25°C, VDROPOUT=97%VOUT
Pin Leakage Current
ILX
-1.0
1.0
µA
SHDN = 0V, VIN = 5.5V, LX = 0V, LX =
5.5V
Output PWM Mode
Peak Current Limit
IPEAK-PWM
1.0
A
PWM Mode, SYNC/PWM = VIN, TA =
+25°C
Output Voltage
Output Voltage Range
VOUT
0.9
VIN
V
Reference Feedback Voltage
VFB
0.78
0.8
0.82
V
Feedback Input Bias Current
IVFB
—0.1
nA
Line Regulation
VLINE-REG
—0.1
%/V
VIN=2.7V to 5.5V, ILOAD=10 mA
Load Regulation
VLOAD-REG
—1.5
%
VIN = 3.6V,
ILOAD = 0 mA to 300 mA
Start-Up Time
TSTART
0.5
ms
PWM Mode, SYNC/PWM=VIN


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