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Kexin

MP2307 Datasheet Preview

MP2307 Datasheet

Step-Down Converter

No Preview Available !

SMD Type
Integrate Circuit
3A, 23V, 340KHz Synchronous Rectified
Step-Down Converter
MP2307
Features
3A Continuous Output Current,
4A Peak Output Current
Wide 4.75V to 23V Operating Input Range
Integrated 100mPower MOSFET Switches
Output Adjustable from 0.925V to 20V
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low ESR Ceramic Output Capacitors
Fixed 340KHz Frequency
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
SOP-8
Functional Block Diagram
FB 5
+
1.1V --
+
0.3V --
OVP
RAMP
OSCILLATOR
CLK
110/340KHz
SS 8
0.925V
--
+
+
ERROR
AMPLIFIER
CURRENT
SENSE
AMPLIFIER
+
--
-- S Q
RQ
+ CURRENT
COMPARATOR
2 IN
5V
1 BS
3 SW
BS
IN
SW
GND
1
2
3
4
COMP 6
EN 7
7V
Zener
--
2.5V +
+
1.5V --
EN OK
LOCKOUT
COMPARATOR
SHUTDOWN
COMPARATOR
1.2V
Absolute Maximum Ratings Ta = 25
Parameter
Input Voltage
Switch Voltage
Boot Strap Voltage
All Other Pins
Power Dissipation
Thermal Resistance
Junction Temperature
Storage Temperature
Lead Temperature
OVP
4
IN < 4.10V
GND
IN
INTERNAL
REGULATORS
Symbol
Vin
VSW
VBS
PD
RθJA
Tj
Tstg
TL
Rating
-0.3 to 26
-1 to VIN +0.3
VSW-0.3 to VSW+6
-0.3 to 6V
2.5
50
150
-65 to 150
260
Unit
V
V
V
V
mW
/W
Recommended Operating Conditions
Input Voltage
Output Voltage
Operating Temperature
Vin
Vout
TA
4.75 to 23
0.925 to 20
-40 to 85
V
V
8 SS
7 EN
6 COMP
5 FB
www.kexin.com.cn 1




Kexin

MP2307 Datasheet Preview

MP2307 Datasheet

Step-Down Converter

No Preview Available !

SMD Type
Integrate Circuit
MP2307
Electrical Characteristics (Ta = 25, VIN=12V,unless otherwise specified)
Parameter
Shutdown Supply Current
Supply Current
Feedback Voltage
Feedback Overvoltage Threshold
Error Amplifier Voltage Gain (4)
Error Amplifier Transconductance
High-Side Switch On-Resistance (4)
Low-Side Switch On-Resistance (4)
High-Side Switch Leakage Current
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense
Transconductance
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time (4)
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage
Hysterisis
EN Lockout Threshold Voltage
EN Lockout Hysterisis
Input Under Voltage Lockout
Threshold
Input Under Voltage Lockout
Threshold Hysteresis
Soft-Start Current
Soft-Start Period
Thermal Shutdown (1)
Note:
1) Guaranteed by design, not tested.
Typlacl Characteristics
Symbol Condition
VEN = 0V
VEN = 2.0V, VFB = 1.0V
VFB 4.75V VIN 23V
AEA
GEA
RDS(ON)1
RDS(ON)2
IC = ±10µA
VEN = 0V, VSW = 0V
Minimum Duty Cycle
From Drain to Source
GCS
Fosc1
Fosc2
DMAX
TON
VFB = 0V
VFB = 1.0V
VEN Rising
VIN Rising
VSS = 0V
CSS = 0.1µF
Min
0.900
4.0
300
1.1
2.2
3.80
Typ
0.3
1.3
0.925
1.1
400
820
100
100
0
5.8
0.9
5.2
340
110
90
220
1.5
220
2.5
210
4.05
210
6
15
160
Max
3.0
1.5
0.950
10
380
2.0
2.7
4.40
Units
µA
mA
V
V
V/V
µA/V
m
m
µA
A
A
A/V
KHz
KHz
%
ns
V
mV
V
mV
V
mV
µA
ms
°C
INPUT
4.75V to 23V
C5
10nF
21
7 IN
EN
BS 3
SW
8
SS
MP2307
5
FB
GND
COMP
46
C3
3.9nF
OUTPUT
3.3V
3A
MP2307_TAC01
Efficiency vs
Load Current
100
95
90 VIN = 12V
VIN = 5V
85
80 VIN = 23V
75
70
65
60
55
50
0.1
1.0
LOAD CURRENT (A)
10
www.kexin.com.cn 2


Part Number MP2307
Description Step-Down Converter
Maker Kexin
Total Page 3 Pages
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