MAX4971EVKIT+ Maxim Integrated, MAX4971EVKIT+ Datasheet - Page 5

• Manufacturer Part Number: MAX4971EVKIT+
• Description: Power Switch ICs - Power Distribution Overvoltage-Protection Controllers with a Low RON Internal FET
• Manufacturer: Maxim Integrated

Specifications of MAX4971EVKIT+

• On Resistance (max): 90 mOhms
• On Time (max): 13 ms
• Off Time (max): 8 us
• Operating Supply Voltage: 2.2 V to 28 V
• Maximum Power Dissipation: 678 mW

(T
4V
A
= +25°C, unless otherwise noted.)
B3, C2,
A2, A3,
C3, C4
A4, B2
UNDERVOLTAGE FAULT RESPONSE
PIN
A1
B1
B4
C1
4ms/div
_______________________________________________________________________________________
NAME
ACOK
GND
OUT
GP
EN
IN
MAX4970/71/72 toc10
Active-Low Open-Drain Adapter-Voltage Indicator Output. ACOK is driven low after the adapter
voltage is stable between UVLO and OVLO for 15ms (typ) (MAX4972), or after the adapter voltage
is stable and greater than UVLO for 15ms (typ) (MAX4970/MAX4971). Connect a pullup resistor
from ACOK to the logic I/O voltage of the host system.
Output Voltage. Output of the internal switch. Connect all the OUT outputs together for proper
operation.
Ground
Voltage Input. Bypass IN with a 1µF ceramic capacitor as close as possible to the device to
obtain ±15kV Human Body Model (HBM) ESD protection. No capacitor is required for ±2kV (HBM)
ESD protection. Connect all the IN inputs together for proper operation.
External pFET Gate-Drive Output. GP pulls the external pFET gate down when the input is above
UVLO and when EN is active (low).
Enable Input. Drive EN low to turn GP pulldown on, GP pullup off, and to turn on the charge pump.
Drive EN high to turn off the device.
Overvoltage-Protection Controllers
V
5V/div
V
5V/div
V
5V/div
I
1A/div
OUT
IN
OUT
ACOK
Typical Operating Characteristics (continued)
SHORT-CIRCUIT FAULT RESPONSE
with a Low R
4µs/div
MAX4970/71/72 toc11
FUNCTION
V
5V/div
V
5V/div
V
5V/div
I
10A/div
OUT
IN
OUT
ACOK
ON
R
C
LOAD
LOAD
OVERCURRENT DURATION TIME
Internal FET
= 1Ω
= 0.1µF
(DURING AUTORETRY)
Pin Description
4ms/div
MAX4970/71/72 toc12
V
2V/div
I
1A/div
OUT
OUT
5