TM
MP2305 – 2A, 23V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN.......................–0.3V to +26V
Switch Voltage VSW.................. –1V to VIN +0.3V
Boost Voltage VBS..........VSW – 0.3V to VSW + 6V
All Other Pins.................................–0.3V to +6V
Junction Temperature...............................150°C
Lead Temperature....................................260°C
Storage Temperature .............–65°C to +150°C
Recommended Operating Conditions (2)
Input Voltage VIN............................ 4.75V to 23V
Output Voltage VOUT .................... 0.923V to 20V
Ambient Operating Temperature .... –40°C to +85°C
TOP VIEW
BS
IN
1
2
3
4
8
7
6
5
SS
EN
SW
GND
COMP
FB
MP2305_PD01
Thermal Resistance (3)
θJA
θJC
SOIC8.....................................90...... 45... °C/W
Part Number*
Package
Temperature
–40° to +85°C
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
MP2305DS
SOIC8
For Tape & Reel, add suffix –Z (eg. MP2305DS–Z)
For Lead Free, add suffix –LF (eg. MP2305DS–LF–Z)
*
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
1
Max
3.0
Units
µA
mA
V
Shutdown Supply Current
Supply Current
VEN = 0V
VEN = 2.0V; VFB = 1.0V
4.75V ≤ VIN ≤ 23V
1.3
1.5
Feedback Voltage
VFB
0.900
0.923
1.1
0.946
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
V
AEA
400
800
130
130
V/V
µA/V
mΩ
mΩ
µA
A
GEA
∆IC = ±10µA
RDS(ON)1
RDS(ON)2
VEN = 0V, VSW = 0V
Minimum Duty Cycle
From Drain to Source
10
2.4
3.4
1.1
A
COMP to Current Sense
Transconductance
GCS
3.5
A/V
Oscillation Frequency
Fosc1
Fosc2
340
100
90
KHz
KHz
%
Short Circuit Oscillation Frequency
VFB = 0V
Maximum Duty Cycle
Minimum On Time (4)
DMAX VFB = 1.0V
220
1.5
ns
EN Shutdown Threshold Voltage
VEN Rising
1.1
2.2
2.0
2.7
V
EN Shutdown Threshold Voltage
Hysteresis
210
mV
EN Lockout Threshold Voltage
EN Lockout Hysterisis
2.5
V
210
mV
MP2305 Rev. 1.7
4/17/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
2
MPS [ MONOLITHIC POWER SYSTEMS ]
