MP1591 – 2A, 32V, 330KHz STEP-DOWN CONVERTER
PACKAGE REFERENCE
TOP VIEW
BS
IN
SW
GND
1
2
3
4
8
7
6
5
REF
EN
COMP
FB
ABSOLUTE MAXIMUM RATINGS
(1)
IN Supply Voltage........................ –0.3V to +34V
SW Voltage............................. –1V to V
IN
+ 0.3V
BS Voltage ....................V
SW
– 0.3V to V
SW
+ 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)
EXPOSED PAD
ON BACKSIDE
(SOIC8N ONLY)
CONNECT TO PIN 4
Input Voltage ................................... 6.5V to 32V
Operating Temperature .............–40°C to +85°C
Thermal Resistance
Temperature
–40°C to +85°C
–40°C to +85°C
(3)
Part Number*
MP1591DN
MP1591DS
*
Package
SOIC8E
SOIC8
SOIC8 (w/ Exposed Pad) ....... 50 ...... 10...
°C/W
SOIC8..................................... 90 ...... 45...
°C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
θ
JA
θ
JC
For Tape & Reel, add suffix –Z (eg. MP1591DN–Z)
For RoHS Compliant Packaging, add suffix –LF
(eg. MP1591DN–LF–Z)
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
A
= +25°C, unless otherwise noted.
Parameter
Shutdown Supply Current
Supply Current
Feedback Voltage
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)
Current Sense to COMP
Transconductance
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
(4)
Minimum Duty Cycle
(4)
EN Shutdown Threshold Voltage
Enable Pull-Up Current
EN UVLO Threshold
EN UVLO Threshold Hysteresis
∆I
C
=
±10µA
500
Symbol Condition
V
EN
=
0V
V
EN
= 5V, V
FB
= 1.4V
6.5V
≤
V
IN
≤
32V, V
COMP
< 2V
Min
Typ
20
1.0
1.230
400
700
120
8.5
0
3.6
3.5
280
V
FB
= 0V
V
FB
= 1.0V
V
FB
= 1.5V
0.8
V
EN
= 0V
V
EN
Rising
2.4
330
35
90
1.2
1.8
2.6
250
380
1100
Max
35
1.2
1.258
Units
µA
mA
V
V/V
µA/V
mΩ
Ω
µA
A
A/V
KHz
KHz
%
%
V
µA
V
mV
1.202
V
EN
= 0V, V
SW
= 0V
2.5
10
4.9
0
1.6
2.8
MP1591 Rev. 2.3
9/27/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
2
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