MAX14670 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – Bidirectional Current-Blocking, High-Input Overvoltage Protector with Adjustable OVLO

MAX14670–MAX14673
EVALUATION KIT AVAILABLE
Bidirectional Current-Blocking, High-Input
Overvoltage Protector
with Adjustable OVLO
General Description
The MAX14670–MAX14673 provide protection to valu-
able consumer circuits against positive voltage faults up
to +28V_DC. An internal clamp also protects the devices
from surges up to +80V. The device is able to disconnect
the system from its output terminal when wrong input
conditions are detected.
The MAX14670–MAX14673 overvoltage protection devic-
es feature low 65mΩ (typ), WLP package on-resistance
(R_ON) internal FETs, effectively minimizing the voltage
drop across the device. When the input voltage exceeds
the overvoltage threshold, the internal FET is turned off to
prevent damage to the protected components.
The overvoltage protection threshold can be adjusted
with optional external resistors to any voltage between
5V and 22V. The devices automatically choose the accu-
rate internal trip thresholds when the overvoltage lockout
input (OVLO) is set lower than the external OVLO select
voltage. The internal OVLO are preset to typical 6.8V
(MAX14670), 15.5V (MAX14671), 5.825V (MAX14672),
or 22V (MAX14673).
The MAX14670–MAX14673 feature reverse bias blocking
capability. Unlike other overvoltage protectors, when the
MAX14670–MAX14673 are disabled, the voltage applied
to OUT does not feed back into IN. These devices also
feature an OTG enable pin that allows OUT voltage to
supply IN. The MAX14670–MAX14673 also have thermal
shutdown protection against over load conditions.
The MAX14670–MAX14673 are specified over the extend-
ed -40°C to +85°C temperature range. The MAX14670/
MAX14671 are available in a 15-bump WLP package and
the MAX14672/MAX14673 are available in a 10-pin TDFN
package.
Ordering Information/Selector Guide and Typical Operating
Circuit appear at end of data sheet.
For related parts and recommended products to use with this part, refer
to www.maximintegrated.com/MAX14670.related.
Benefits and Features
● Protect High-Power Portable Devices
• Wide Operating Input Voltage Protection from
+3V to +28V
• +80V Surge Capability
• 4.5A Continuous Current Capability (WLP Package)
• Integrated 65mΩ (typ) n-Channel MOSFET Switch
(WLP Package)
● Flexible Overvoltage Protection Design
• Wide +5V to +22VAdjustable OVLO Threshold
Range
• ACOK and ACOK Indicate Input is in Range
• OTG Enable Allows OUT to Supply IN
• Preset Accurate Internal OVLO Thresholds:

6.8V ±3% (MAX14670)

15.5V ±3% (MAX14671)

5.825V ±3% (MAX14672)

22V ±3% (MAX14673)
● Additional Protection Features Increase System
Reliability
• OUT-IN Reverse Bias Blocking Capability
• Soft-Start to Minimize Inrush Current
• Internal 15ms Startup Debounce
• Thermal Shutdown Protection
● Space Saving
• 15-Bump, 1.6mm x 2.1mm, WLP Package
• 10-Pin, 3mm x 3mm, TDFN Package
Applications
● Tablets
● Smart Phones
● E-Readers
● PC Notebooks
● Charging USB Hosts
19-6727; Rev 0; 6/13