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MP8845 Datasheet(PDF) 4 Page - Monolithic Power Systems

Part # MP8845
Description  5A, Highly Efficient, Synchronous, Step-Down Switcher with I2C Interface
PDF  23 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP8845 Datasheet(HTML) 4 Page - Monolithic Power Systems

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MP8845
– 5A, HIGHLY EFFICIENT, SYNC, STEP-DOWN SWITCHER WITH I2C
MP8845 Rev. 1.1
www.MonolithicPower.com
4
2/23/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 5V, TJ = -40°C to +125°C, typical value is tested at TJ = +25°C. The limit over temperature is
guaranteed by characterization, unless otherwise noted.
Parameter
Symbol
Condition
Min
Typ
Max
Units
Input voltage range
VIN
2.7
6
V
Quiescent current
(5)
IQ
EN = 1.8V, no switching, PFM
mode
280
μA
Io = 0A, switching, PWM mode
18
mA
Shutdown current
IS
EN = GND, TJ = 25°C
1
μA
Internal reference voltage
VREF
TJ = 25°C
0.594
0.6
0.606
V
TJ = -10°C to 70°C
0.591
0.6
0.609
TJ = -40°C to 125°C
0.588
0.6
0.612
Lowest output voltage
VLOW
Register = 00h, TJ = 25°C
0.594
0.6
0.606
V
TJ = -10°C to 70°C
0.591
0.6
0.609
TJ = -40°C to 125°C
0.588
0.6
0.612
Highest output voltage
VHIGH
Register = 7Fh,
TJ =-10°C to 70°C
1.084
1.1
1.117
V
TJ = -40°C to 125°C
1.079
1.1
1.122
Output voltage step
VSTEP
3.9
mV
High-side switch on resistance
RHSON
28
mΩ
Low-side switch on resistance
RLSON
17
mΩ
UVLO rising threshold
VUVLOR
2.55
2.7
V
UVLO hysteretic
VUVLOHY
150
mV
Switching frequency
FSW
1
2.2
MHz
Frequency variation
25
%
Minimum on time
(5)
TMINON
60
ns
Switch leakage
ISW
VEN = 0V, VIN = 5V,
VSW = 0V and 5V, TJ = 25°C
1
μA
EN input current
IEN
VEN = VIN = 5V
5
μA
EN logic low voltage
VENL
0.4
V
EN logic high voltage
VENH
1.8
V
Power good upper-trip
threshold
VPGH
VO with respect to the regulation,
PG falling
110%
VTARGET
Power good lower-trip threshold
VPGL
VO with respect to the regulation,
PG rising
90%
VTARGET
Power good pull-down voltage
VPGL
ISINK = 1mA
0.4
V
Power good delay
TPGd
50
μs
Power good leakage
IPGd
1
μA
High-side switch peak current
limit (source)
Ipeak
6
7.5
9
A
High-side switch valley current
limit
(5)
Ivalley
6.5
A
Low-side switch current limit
(sink)
(5)
PFM mode
0
A
PWM mode
-5
A



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