ME2159B
0.8A Step-Up Current Mode PWM Converter ME2159B
Description
The ME2159B is a current mode boost DC-DC
converter. Its PWM circuitry with built-in 0.18Ω power
MOSFET make this regulator highly power efficient.
The internal compensation network also minimizes
as much as 6 external component counts. The
non-inverting input of error amplifier connects to a 0.6V
precision reference voltage and internal soft-start
function can reduce the inrush current.
Features
Precision Feedback Reference Voltage:
0.6V ● Reference Voltage accuracy: ±
2%
Adjustable Output up to 12V
Internal Fixed PWM frequency: 650KHz
Internal 0.18Ω,2A, 16V Power MOSFET
Shutdown Current: 0.1μA
Over Temperature Protection:165℃
Applications
Chargers
LCD Displays
Digital Cameras
Handheld Devices
Portable Products
Package
●
6-pin SOT23-6
V05
Page 1 of 9
ME2159B
Absolute Maximum Ratings
Parameter
Power supply voltage, V
IN
voltage at EN、FB Pin
voltage at SW Pin
LX Pin Current
Internal Power Dissipation（SOT23-6）
Operating Ambient Temperature
Storage Temperature
Soldering temperature and time
Symbal
V
IN
V
EN
,V
FB
V
LX
I
LX
P
D
T
opr
T
stg
T
solder
Rating
-0.3½6.0
-0.3½V
IN
-0.3½12
2200（VIN=3.0V,VOUT=5.0V）
300
-40~125
-40~+150
260° 10S
C,
Unit
V
V
V
mA
mW
°
C
°
C
°
C
Electrical Characteristics
（V
IN
= V
EN
=3.3V, V
OUT
=5V, C1= C2= 22μF, L=4.7μH, T
A
=25 ° unless otherwise noted.）
C,
Parameter
System Supply Input
Input voltage range
Under Voltage Lockout
UVLO Hysteresis
Average Supply Current
I
SS1
V
FB
=0.55V, Switching
V
IN
V
UVLO
2.5
-
2.15
0.08
0.8
1.5
5.5
V
V
V
mA
Symbol
Test condition
Min
Typ.
Max
Unit
Quiescent Current
Shutdown Supply Current
Oscillator
Operation Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Reference Voltage
Reference Voltage
Line Regulation
Enable Control
V05
I
SS2
I
SS3
V
FB
=0.66V, No Switching
V
EN
=GND
280
0.1
360
5
μA
μA
F
OSC
D
MAX
D
MIN
V
FB
=1.0V
0.5
0.65
90
22
0.8
MHz
%
%
V
FB
V
IN
=2.6V to 4.3V
0.588
0.6
0.03
0.612
0.1
V
%/V
Page 4 of 9
ME2159B
Enable Voltage
Shutdown Voltage
MOSFET
On Resistance of Driver
Protection
OCP Current
Over Temperature Protection
OTP
Hysteresis
I
OCP
OTP
OTH
-
-
2.2
165
25
-
-
A
°
C
°
C
R
DS (ON)
I
LX
=2A
0.18
Ω
V
EN
V
EN
1.5
-
0.6
V
V
Typical Performance Characteristics（ME2159BM6G）
1、Output Voltage VS. Output Current
（Vout
=5.0V）
2、Efficiency VS. Output Current（Vout=5.0V）
Efficiency VS.Output Current
100
Efficiency(%)
80
60
VIN=2.5V
VIN=4.2V
40
20
0
0
200
400
600
800
VIN=3.0V VIN=3.3V
1000 1200 1400 1600 1800
Output Current（mA）
3、V
OUT
VS. Input Voltage
（I
OUT
=10mA）
Output Voltage VS.Input Voltage
5.1
5.05
5
4.95
4.9
4.85
4.8
4.75
4.7
2.5
3
3.5
4
4.5
5
Input Voltage(V)
4、I
SS1
VS. Input Voltage
Average Supply Current VS. Input Voltage
1.2
Average Supply
Current(mA)
Output Voltage (V)
1
0.8
0.6
0.4
0.2
0
2.5
3
3.5
4
4.5
5
5.5
Input Voltage(V)
V05
Page 5 of 9
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