MAX4987AE Datasheet, PDF (1/10 Pages) Maxim Integrated Products – Overvoltage-Protection Controller with USB ESD Protection

19-1059; Rev 0; 11/07
Overvoltage-Protection Controller
with USB ESD Protection
General Description
The MAX4987AE/MAX4987BE are overvoltage protection
devices with built-in ESD protection for USB data lines.
These devices feature a low 100mΩ (typ) R_ON internal
nFET switch and protect low-voltage systems against volt-
age faults up to +28V. When the input voltage exceeds
the overvoltage threshold or decreases below the under-
voltage threshold, the internal nFET switch is turned off to
prevent damage to the protected components.
All switches feature a minimum 1.5A current-limit pro-
tection. During a short-circuit occurrence, the switch
operates in an autoretry mode where the internal nFET
switch is turned on to check if the fault has been
removed. The autoretry interval is 30ms, and if the fault
is removed, the nFET switch remains on.
The MAX4987AE/MAX4987BE feature low-capacitance
(3pF) ESD protection for USB data lines that allow
transmission of high-speed USB 2.0 signals.
The overvoltage threshold (OVLO) is preset to 6.15V.
The undervoltage thresholds (UVLO) are preset to 2.55V
(MAX4987AE) or 4.2V (MAX4987BE). When the input
voltage drops below the undervoltage (UVLO) thresh-
old, the devices enter a low-current standby mode.
All devices are offered in a small 2mm x 3mm, 8-pin
TDFN package and operate over the -40°C to +85°C
extended temperature range.
Cell Phones
Media Players
Applications
Typical Operating Circuit appears at end of data sheet.
Features
o Input Voltage Protection Up to +28V
o Integrated Low R_ON (100mΩ) nFET Switch
o Internal Overcurrent Protection 1.5A (min)
o Overcurrent Protection (Autoretry)
o Enable Input
o Internal 30ms Startup Delay
o Low-Capacitance USB High-Speed Data Line ESD
Protection (3pF)
±15kV Human Body Model
±15kV IEC61000-4-2 Air Gap
±6kV IEC61000-4-2 Contact
o Thermal-Shutdown Protection
o 2mm x 3mm, 8-Pin TDFN Package
TOP VIEW
Pin Configuration
OUT ACOK EN VCC
8765
MAX4987AE/
MAX4987BE
*CONNECT EXPOSED
PAD TO GND.
*EP
1 234
IN CD+ GND CD-
TDFN-EP
2mm x 3mm
Ordering Information/Selector Guide
PART
MAX4987AEETA+
MAX4987BEETA+*
PIN-
PACKAGE
8 TDFN-EP**
8 TDFN-EP**
TOP MARK
AAI
AAJ
PACKAGE
CODE
T823-1
T823-1
UVLO (V)
2.55
4.2
Note: All devices are specified over the -40°C to +85°C operating temperature range.
+Denotes a lead-free package.
*Future product—contact factory for availability.
**EP = Exposed paddle.
OVLO (V)
6.15
6.15
OVERCURRENT
MODE
Autoretry
Autoretry
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.