SWITCHING REGULATOR. ME2149 Datasheet

ME2149 REGULATOR. Datasheet pdf. Equivalent

ME2149 Datasheet
Recommendation ME2149 Datasheet
Part ME2149
Description ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR
Feature ME2149; ME2149 ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR General Descripti.
Manufacture Microne
Datasheet
Download ME2149 Datasheet




Microne ME2149
ME2149
ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL
STEP-UP SWITCHING REGULATOR
Description
The ME2149 series is a CMOS step-up
switching regulator which mainly consists of a
reference voltage source, an oscillation circuit,
an error amplifier, a phase compensation circuit,
a PWM/PFM switching control circuit. With an
internal low-ON-resistance Nch Power MOS, this
product is applicable to applications requiring
high efficiency and high output current. The
ME2149 series switches its operation to the PFM
control circuit whose duty ratio is 15 % with to the
PWM/PFM switching control circuit under a light
load and to prevent decline in the efficiency by IC
operation current.
Selection Guide
Feature
Low voltage operation: Start-up is guaranteed
from 0.9 V(IOUT =1 mA )
Duty ratio: Built-in PWM/PFM switching control
circuit 15 to 78 % .
oscillator frequency1.0MHz
Output voltage range: 1.5V ~6.5 V
Output voltage accuracy±2%
Soft start function: 2 mS.
PACKAGESOT23-5,SOT89-5,SOP8
Typical Application
MP3 players, digital audio players
Digital cameras, GPS, wireless transceiver
Portable devices
V2.0
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Microne ME2149
Pin Configuration
ME2149
SOT23-5
SOT89-5
SOP8
Pin information
TYPE POSFIX PACKAGE
ME2149F
M5
P5
SOP8
SOT23-5
SOT89-5
SOP8
SWICHING
TRANSISTOR
Build in
Transistor
CE VDD FB
FUNCTION FUNCTION FUNCTION
Yes Yes Yes
FEATURE
LX+FB
ME2149F
Pin Number
SOT23-5 SOT89-5 SOP8
133
2 2 7,8
312
4 5 5,6
544
1
Pin Name
CE
LX
GND
VDD
FB
NC
Function
Shutdown pin
External transistor connection pin
GND pin
IC power supply pin
Feed Back voltage pin
NC
V2.0
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Microne ME2149
Block Diagram
ME2149
Absolute Maximum Rang
PARAMETER
VDD Pin Voltage
LX Pin Voltage
CE Pin Voltage
LX Pin Current
SYMBOL
VDD
LX
VCE
ILX
Power Dissipation
Pd
Operating Temperature Range
Storage Temperature Range
TOpr
Tstg
RATING
-0.36.5
-0.320
-0.3Vin+0.3
±4000
SOT23-5
SOT89-5
SOP8
300
500
800
-25~+85
-40~+125
UNIT
V
V
V
mA
mW
V2.0
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