MAX14653 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – High-Current Overvoltage Protector with Adjustable OVLO

MAX14653/MAX14654/
MAX14655
EVALUATION KIT AVAILABLE
High-Current Overvoltage Protector
with Adjustable OVLO
General Description
The MAX14653/MAX14654/MAX14655 overvoltage pro-
tection devices feature a low 38mΩ (typ) R_ON internal
FET and protect low-voltage systems against voltage
faults up to +28V_DC. An internal clamp also protects the
devices from surges up to +80V. When the input voltage
exceeds the overvoltage threshold, the internal FET is
turned off to prevent damage to the protected down-
stream components.
The overvoltage protection threshold can be adjusted with
optional external resistors to any voltage between 4V and
20V. With the OVLO input set below the external OVLO
select voltage, the MAX14653/MAX14654/MAX14655
automatically choose the accurate internal trip thresholds.
The internal overvoltage thresholds (OVLO) are preset to
15.5V typical (MAX14653), 6.8V typical (MAX14654), or
5.825V typical (MAX14655). The devices feature an open-
drain ACOK output indicating a stable supply between
minimum supply voltage and V_OVLO. The MAX14653/
MAX14654/MAX14655 are also protected against over-
current events by an internal thermal shutdown.
The MAX14653/MAX14654/MAX14655 are offered in a
small 12-bump WLP package and operate over the -40ºC
to +85ºC extended temperature range.
Applications
● Smart Phones
● Tablet PCs
● Mobile Internet Devices
Typical Application Circuit
Benefits and Features
● Protect High-Power Portable Devices
• Wide Operating Input Voltage Protection from
+2.5V to +28V
• Integrated 38mΩ (typ) n-Channel MOSFET Switch
● Flexible Overvoltage Protection Design
• Adjustable Overvoltage-Protection Trip Level
• Wide Adjustable OVLO Threshold Range from
+4V to +20V
• Preset Internal Accurate OVLO Thresholds:
15.5V ±3.3% (MAX14653)
6.8V ±2.9% (MAX14654)
5.825V ±3% (MAX14655)
● Additional Protection Features Increase System
Reliability
• Surge Immunity to +80V
• Soft-Start to Minimize In-Rush Current
• Internal 15ms Startup Debounce
• Thermal-Shutdown Protection
● Minimize PCB Area
• 12-Bump WLP (1.29mm x 1.83mm) Package
● -40ºC to +85ºC Operating Temperature Range
Ordering Information/Selector Guide appears at end of
data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX14653.related.
POWER
ADAPTER
0.1µF
R1*
R2*
IN
OUT
IN
OUT
IN
OUT
MAX14653
MAX14654
OVLO MAX14655
GND ^ACOK
1µF
VI/O
CHARGER
PMIC
APPS PROCESSOR
Li-ION
BATTERY
*R1 AND R2 ARE ONLY REQUIRED FOR ADJUSTABLE OVLO; OTHERWISE, CONNECT OVLO TO GND.
19-6550; Rev 0; 1/13