MAX14571 Datasheet, PDF (8/14 Pages) Maxim Integrated Products – Adjustable Overvoltage and Overcurrent Protectors with High Accuracy

MAX14571/MAX14572/MAX14573
Adjustable Overvoltage and Overcurrent
Protectors with High Accuracy
Pin Configuration
TOP VIEW
IN ^{1 +}
IN 2
IN 3
UVLO 4
OVLO 5
MAX14571
MAX14572
MAX14573
SETI 6
GND 7
*EP
14 OUT
13 OUT
12 OUT
11 FLAG
10 EN
9 RIEN
8 HVEN
TSSOP
*CONNECT EXPOSED PAD TO GND
PIN
1, 2, 3
4
5
6
7
8
9
10
11
12, 13, 14
—
8  
NAME
IN
UVLO
OVLO
SETI
GND
HVEN
RIEN
EN
FLAG
OUT
EP
Pin Description
FUNCTION
Overvoltage-Protection Input. Bypass IN to GND with a 1FF ceramic capacitor placed as close
as possible to the device. Use a 1FF, low-ESR ceramic capacitor to enable Q15kV (HBM) ESD
protection on IN. For hot-plug applications, see the Applications Information section.
Externally Programmable Undervoltage-Lockout Threshold. Connect UVLO to GND to use the
default internal UVLO threshold. Connect UVLO to an external resistor-divider to define a threshold
externally and override the preset internal UVLO threshold.
Externally Programmable Overvoltage-Lockout Threshold. Connect OVLO to GND to use the
default internal OVLO threshold. Connect OVLO to an external resistor-divider to define a threshold
externally and override the preset internal OVLO threshold.
Overload-Current Limit Adjust. Connect a resistor from SETI to GND to program the overcurrent
limit. If SETI is unconnected, the current limit is set to 0A. If SETI is connected to GND, the FETs
turn off and FLAG is asserted. Do not connect more than 10pF to SETI.
Ground
Active-Low Enable Input. HVEN is high-voltage-capable enable input. Drive HVEN low for normal
operation. Drive HVEN high to disable the device. HVEN has up to 36V overvoltage protection at
the input (Table 1).
Reverse-Current Enable Input. Connect RIEN to GND to disable the reverse-current flow
protection. Connect RIEN to logic-high to activate the reverse-current flow protection.
Active-High Enable Input. Drive EN high for normal operation. Drive EN low to disable the device
(Table 1).
Open-Drain, Fault Indicator Output. FLAG goes low when the fault duration exceeds the blanking
time, reverse current is detected, thermal-shutdown mode is active, OVLO threshold is reached, or
SETI is connected to GND.
Output Voltage. Output of internal FETs. Bypass OUT to GND with a 1FF ceramic capacitor placed
as close as possible to the device. For a long output cable or inductive lead, see the Applications
Information section.
Exposed Pad. Internally connected to GND. Connect EP to a large ground plane to maximize
thermal performance. Do not use EP as the single GND connection.
Maxim Integrated