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MP2355DN 数据表(PDF) 2 Page - Monolithic Power Systems

部件名 MP2355DN
功能描述  3A, 23V, 380KHz Step-Down Converter
PDF  10 Pages
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制造商  MPS [Monolithic Power Systems]
网页  http://www.monolithicpower.com
标志 MPS - Monolithic Power Systems

MP2355DN 数据表(HTML) 2 Page - Monolithic Power Systems

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MP2355 – 3A, 23V, 380KHz STEP-DOWN CONVERTER
MP2355 Rev. 1.5
www.MonolithicPower.com
2
5/1/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
TM
PACKAGE REFERENCE
SS
BST
VIN
LX
RUN
COMP
FB
GND
1
2
3
4
8
7
6
5
TOP VIEW
MP2355_PD01-SOIC8N
EXPOSED PAD
ON BACKSIDE
CONNECT TO PIN 5
Part Number*
Package
Temperature
MP2355DN
SOIC8N
(Exposed Pad)
–40
°C to +85°C
* For Tape & Reel, add suffix –Z (eg. MP2355DN–Z)
For RoHS compliant packaging, add suffix –LF (eg.
MP2355DN –LF–Z)
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage VIN....................... –0.3V to +25V
Switch Voltage VLX....................... –0.3V to +26V
Boost Voltage VBST ..........VLX – 0.3V to VLX + 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 23V
Operating Temperature .............–40
°C to +85°C
Thermal Resistance
(3)
θJA
θJC
SOIC8N .................................. 50 ...... 10...
°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
VRUN = 0V
20
30
µA
Supply Current
VRUN = 2.8, VFB = 1.5V
1.0
1.2
mA
Feedback Voltage
VFB
4.75V
≤ VIN ≤ 23V,
VCOMP < 2V
1.194
1.222
1.250
V
Error Amplifier Voltage Gain
AVEA
400
V/V
Error Amplifier
Transconductance
GEA
∆ICOMP = ±10µA
500
800
1120
µA/V
High-Side Switch-On
Resistance
RDS(ON)1
95
mΩ
Low-Side Switch-On
Resistance
RDS(ON)2
10
Ω
High-Side Switch Leakage
Current
VRUN = 0V, VLX = 0V
0
10
µA
Current Limit
(4)
3.7
4.3
A
Current Sense to COMP
Transconductance
GCS
3.8
A/V
Oscillation Frequency
fS
330
380
430
KHz
Short Circuit Oscillation
Frequency
VFB = 0V
20
35
50
KHz
Maximum Duty Cycle
DMAX
VFB = 1.0V
90
%
Minimum Duty Cycle
DMIN
VFB = 1.5V
0
%
EN Shutdown Threshold
Voltage
0.9
1.2
1.5
V



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