20BQ030 Ver la hoja de datos (PDF) - Monolithic Power Systems
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20BQ030 Datasheet PDF : 11 Pages
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MP1591 – 2A, 32V, 330KHz STEP-DOWN CONVERTER
PACKAGE REFERENCE
TOP VIEW
BS 1
IN 2
SW 3
GND 4
EXPOSED PAD
ON BACKSIDE
(SOIC8N ONLY)
CONNECT TO PIN 4
8 REF
7 EN
6 COMP
5 FB
Part Number* Package
Temperature
MP1591DN
MP1591DS
SOIC8E
SOIC8
–40°C to +85°C
–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
Shutdown Supply Current
Supply Current
Feedback Voltage
Error Amplifier Voltage Gain
VEN = 0V
VEN = 5V, VFB = 1.4V
6.5V ≤ VIN ≤ 32V, VCOMP < 2V
Error Amplifier Transconductance
High-Side Switch On Resistance (4)
Low-Side Switch On Resistance (4)
∆IC = ±10µA
High-Side Switch Leakage Current
Current Limit (5)
VEN = 0V, VSW = 0V
Current Sense to COMP
Transconductance
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle (4)
Minimum Duty Cycle (4)
EN Shutdown Threshold Voltage
VFB = 0V
VFB = 1.0V
VFB = 1.5V
Enable Pull-Up Current
EN UVLO Threshold
EN UVLO Threshold Hysteresis
VEN = 0V
VEN Rising
Min
1.202
500
2.5
Typ
20
1.0
1.230
400
700
120
8.5
0
3.6
Max
35
1.2
1.258
1100
10
4.9
Units
µA
mA
V
V/V
µA/V
mΩ
Ω
µA
A
3.5
A/V
280 330 380 KHz
35
KHz
90
%
0
%
0.8 1.2 1.6
V
1.8
µA
2.4 2.6 2.8
V
250
mV
MP1591 Rev. 2.3
www.MonolithicPower.com
2
9/27/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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