MP1593 – 3A, 28V, 385KHz STEP-DOWN CONVERTER
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN.......................–0.3V to +30V
Switch Voltage VSW.............. –0.5V 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 28V
Ambient Operating Temp............. –40°C to +85°C
TOP VIEW
BS
IN
1
2
3
4
8
7
6
5
SS
EN
SW
GND
COMP
FB
EXPOSED PAD
ON BACKSIDE
CONNECT TO PIN 4
Thermal Resistance (3)
SOIC8E (Exposed Pad)..........50...... 10... °C/W
θJA
θJC
Part Number*
Package
Temperature
SOIC8E
(Exposed Pad)
MP1593DN
–40°C 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.
For Tape & Reel, add suffix –Z (eg. MP1593DN–Z)
For RoHS Compliant Packaging, add suffix –LF
(eg. MP1593DN–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
20
Max
30
Units
µA
Shutdown Supply Current
Supply Current
VEN = 0V
VEN = 2.6V, VFB = 1.4V
4.75V ≤ VIN ≤ 28V
COMP < 2V
1.0
1.2
mA
Feedback Voltage
VFB
AEA
GEA
1.194
500
1.222
400
1.250
V
V
Error Amplifier Voltage Gain
V/V
µA/V
Error Amplifier
Transconductance
800
1120
140
∆ICOMP = ±10µA
High-Side Switch
On-Resistance
RDS(ON)1
RDS(ON)2
100
10
mΩ
Low-Side Switch
On-Resistance
Ω
High-Side Switch Leakage
Current
VEN = 0V, VSW = 0V
0
10
µA
A
Current Limit
4.8
6.2
5.4
385
45
7.6
Current Sense to COMP
Transconductance
GCS
fOSC1
fOSC2
A/V
KHz
KHz
Oscillation Frequency
335
25
435
60
Short Circuit Oscillation
Frequency
VFB = 0V
Maximum Duty Cycle
Minimum Duty Cycle
DMAX VFB = 1.0V
DMIN VFB = 1.5V
90
%
%
0
MP1593 Rev. 1.9
9/14/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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