TM
MP1591 – 2A, 32V, 330KHz STEP-DOWN CONVERTER
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS (1)
IN Supply Voltage........................–0.3V to +34V
SW Voltage............................. –1V to VIN + 0.3V
BS Voltage ....................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 ................................... 6.5V to 32V
Operating Temperature .............–40°C to +85°C
TOP VIEW
BS
IN
1
2
3
4
8
7
6
5
REF
EN
SW
GND
COMP
FB
MP1591_PD01-SOIC8/N
EXPOSED PAD
ON BACKSIDE
(SOIC8N ONLY)
CONNECT TO PIN 4
Thermal Resistance (3)
θJA
θJC
SOIC8 (w/ Exposed Pad) .......50...... 10... °C/W
SOIC8.....................................90...... 45... °C/W
Part Number*
Package
Temperature
–40°C to +85°C
–40°C to +85°C
MP1591DN
MP1591DS
SOIC8N
SOIC8
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. MP1591DN–Z)
For Lead Free, add suffix –LF (eg. MP1591DN–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
35
Units
µA
Shutdown Supply Current
Supply Current
VEN = 0V
VEN = 5V, VFB = 1.4V
6.5V ≤ VIN ≤ 32V, VCOMP < 2V
1.0
1.2
mA
V
Feedback Voltage
1.202 1.230 1.258
400
Error Amplifier Voltage Gain
Error Amplifier Transconductance
High-Side Switch On Resistance (4)
Low-Side Switch On Resistance (4)
High-Side Switch Leakage Current
Current Limit (5)
V/V
µA/V
mꢀ
ꢀ
500
700
120
8.5
0
1100
∆IC = ±10µA
VEN = 0V, VSW = 0V
10
µA
2.5
3.6
4.9
A
Current Sense to COMP
Transconductance
3.5
A/V
Oscillation Frequency
280
330
35
380
KHz
KHz
%
Short Circuit Oscillation Frequency
Maximum Duty Cycle (4)
Minimum Duty Cycle (4)
VFB = 0V
VFB = 1.0V
VFB = 1.5V
90
0
%
EN Shutdown Threshold Voltage
Enable Pull-Up Current
0.8
2.4
1.2
1.8
2.6
250
1.6
V
VEN = 0V
µA
V
EN UVLO Threshold
VEN Rising
2.8
EN UVLO Threshold Hysteresis
mV
MP1591 Rev. 2.1
12/5/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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