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SS33 Fiches technique(PDF) 2 Page - Monolithic Power Systems

No de pièce SS33
Description  2A, 32V, 330KHz Step-Down Converter
Download  11 Pages
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Fabricant  MPS [Monolithic Power Systems]
Site Internet  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

SS33 Fiches technique(HTML) 2 Page - Monolithic Power Systems

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MP1591 – 2A, 32V, 330KHz STEP-DOWN CONVERTER
MP1591 Rev. 2.3
www.MonolithicPower.com
2
9/27/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
PACKAGE REFERENCE
Part Number*
Package
Temperature
MP1591DN
SOIC8E
–40
°C to +85°C
MP1591DS
SOIC8
–40
°C to +85°C
* For Tape & Reel, add suffix –Z (eg. MP1591DN–Z)
For RoHS Compliant Packaging, add suffix –LF
(eg. MP1591DN–LF–Z)
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
Thermal Resistance
(3)
θJA
θJC
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.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
Max
Units
Shutdown Supply Current
VEN = 0V
20
35
µA
Supply Current
VEN = 5V, VFB = 1.4V
1.0
1.2
mA
Feedback Voltage
6.5V
≤ VIN ≤ 32V, VCOMP < 2V
1.202
1.230
1.258
V
Error Amplifier Voltage Gain
400
V/V
Error Amplifier Transconductance
∆IC = ±10µA
500
700
1100
µA/V
High-Side Switch On Resistance
(4)
120
mΩ
Low-Side Switch On Resistance
(4)
8.5
High-Side Switch Leakage Current
VEN = 0V, VSW = 0V
0
10
µA
Current Limit
(5)
2.5
3.6
4.9
A
Current Sense to COMP
Transconductance
3.5
A/V
Oscillation Frequency
280
330
380
KHz
Short Circuit Oscillation Frequency
VFB = 0V
35
KHz
Maximum Duty Cycle
(4)
VFB = 1.0V
90
%
Minimum Duty Cycle
(4)
VFB = 1.5V
0
%
EN Shutdown Threshold Voltage
0.8
1.2
1.6
V
Enable Pull-Up Current
VEN = 0V
1.8
µA
EN UVLO Threshold
VEN Rising
2.4
2.6
2.8
V
EN UVLO Threshold Hysteresis
250
mV
BS
IN
SW
GND
REF
EN
COMP
FB
1
2
3
4
8
7
6
5
TOP VIEW
EXPOSED PAD
ON BACKSIDE
(SOIC8N ONLY)
CONNECT TO PIN 4


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