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MAX4959 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX4959
Description  High-Voltage OVP with Battery Switchover
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX4959 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The MAX4959/MAX4960 overvoltage protection con-
trollers protect low-voltage systems against high-volt-
age faults of up to +28V. When the input voltage
exceeds the overvoltage lockout (OVLO) threshold,
these devices turn off an external pFET to prevent dam-
age to the protected components. The undervoltage
lockout (UVLO) threshold holds the external pFET off
until the input voltage rises to the correct level. An addi-
tional safety feature latches off the pFET when an incor-
rect low-power adapter is plugged in.
The MAX4959/MAX4960 control an external battery
switchover pFET (P2) (see Figures 4 and 6) that switches
in the battery when the AC adapter is unplugged. The
undervoltage and overvoltage trip levels can be adjusted
with external resistors.
The input is protected against ±15kV HBM ESD when
bypassed with a 1µF ceramic capacitor to ground. All
devices are available in a small 10-pin (2mm x 2mm)
µDFN and 10-pin µMAX packages and are specified for
operation over the extended -40°C to +85°C temperature
range.
Applications
Notebooks
Laptops
Camcorders
Ultra-Mobile PCs
Features
o Overvoltage Protection Up to +28V
o ± 2.5% Accurate Externally Adjustable
OVLO/UVLO Thresholds
o Battery Switchover pFET Control
o Protection Against Incorrect Power Adapter
o Low (100µA Typ) Supply Current
o 25ms Input Debounce Timer
o 25ms Blanking Time
o 10-Pin (2mm x 2mm) µDFN and 10-Pin µMAX
Packages
High-Voltage OVP with Battery Switchover
________________________________________________________________
Maxim Integrated Products
1
19-0874; Rev 0; 7/07
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
PKG
CODE
MAX4959ELB+ -40°C to +85°C
10 μDFN
AAO
L1022-1
MAX4959EUB+* -40°C to +85°C
10 μMAX
U10-1
MAX4960ELB+ -40°C to +85°C
10 μDFN
AAP
L1022-1
MAX4960EUB+* -40°C to +85°C
10 μMAX
U10-1
12
3
10
9
8
45
76
MAX4959
MAX4960
µDFN
TOP VIEW
+
1
2
3
4
5
6
7
8
9
10
GATE2
GND
VDD
N.C.
GATE1
OVS
( ) MAX4960 ONLY.
IN
N.C.
(SOURCE1)
MAX4959
MAX4960
µMAX
CB
UVS
Pin Configurations
Typical Operating Circuits appear at end of data sheet.
+
Denotes a lead-free package.
*
Future product—Contact factory for availability.


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