Datasheet

MAX4959/MAX4960
High-Voltage OVP with Battery Switchover
4
Maxim Integrated
LOW-POWER ADAPTER RESPONSE
(V
OVLO
= 22.3V, V
UVLO
= 10.1V, pFET = IRF7726)
MAX4959/60 toc04
TIME (s)
VOLTAGE (V)
0.250.20.150.1.05
1
3
5
7
9
11
13
-1
0 0.3
LOAD BECOMES
PRESENT
DRAIN OF P1
V
IN
V
GATE1
BATTERY SWITCHOVER WITH ADAPTER-
PLUGGED RESPONSE
(V
IN
= 19V, V
GATE2-PULLUP
= 4.2V, R
PULLUP
= 5kΩ)
MAX4959/60 toc05
TIME (μs)
VOLTAGE (V)
100500-50-100
0
5
10
15
20
25
-5
-150 150
V
GATE1
V
GATE2
CB
OVERVOLTAGE AND UNDERVOLTAGE TRIP
DIFFERENCE vs. TEMPERATURE
(R
PULLUP
= 1kΩ)
MAX4959/60 toc06
TEMPERATURE (°C)
VOLTAGE (V)
70503010-10-30
-4
-3
-2
-1
0
1
2
3
4
5
-5
-50 90
UV TRIP DIFF
OV TRIP DIFF
SUPPLY CURRENT vs. INPUT VOLTAGE
MAX4959/60 toc07
V
IN
(V)
I
SUPP
(μA)
252015105
0
40
80
120
160
200
-40
0
LOGIC-INPUT THRESHOLD vs. TEMPERATURE
MAX4959/60 toc08
TEMPERATURE (°C)
LOGIC THRESHOLD (V)
907030 50-10 10-30
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
0
-50
V
TH-LO
V
TH-HI
V
DD
SUPPLY CURRENT vs. TEMPERATURE
MAX4959/60 toc09
TEMPERATURE (°C)
V
DD
SUPPLY CURRENT (μA)
9070503010-10-30
4
4.5
5
3.5
-50 110
VOLTAGE RANGE vs. INPUT VOLTAGE RANGE
MAX4959/60 toc10
V
IN
(V)
V
DD
(V)
1052515 20
1
2
3
4
5
6
0
0
Typical Operating Characteristics (continued)
(V
OVLO
= 22.2V and V
UVLO
= 10.1V, R1 = 887kΩ, R2 = 66.5kΩ, R3 = 54.9kΩ, all resistors 1%, OV
REF
= UV
REF
= 1.228V.)