Rainbow Electronics MAX4987BE - Manual

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.
Applications
Cell Phones
Media Players
Features
♦ Input Voltage Protection Up to +28V
♦ Integrated Low R
ON (100mΩ) nFET Switch
♦ Internal Overcurrent Protection 1.5A (min)
♦ Overcurrent Protection (Autoretry)
♦ Enable Input
♦ Internal 30ms Startup Delay
♦ Low-Capacitance USB High-Speed Data Line ESD
Protection (3pF)
±15kV Human Body Model
±15kV IEC 61000-4-2 Air Gap
±6kV IEC 61000-4-2 Contact
♦ Thermal-Shutdown Protection
♦ 2mm x 3mm, 8-Pin TDFN Package
MAX4987AE/MAX4987BE
Overvoltage-Protection Controller
with USB ESD Protection
________________________________________________________________ Maxim Integrated Products 1
Ordering Information/Selector Guide
19-1059; Rev 0; 11/07
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.
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.
Typical Operating Circuit appears at end of data sheet.
PART
PIN-
PACKAGE
TOP MARK
PACKAGE
CODE
UVLO (V) OVLO (V)
OVERCURRENT
MODE
MAX4987AEETA+ 8 TDFN-EP** AAI T823-1 2.55 6.15 Autoretry
MAX4987BEETA+* 8 TDFN-EP** AAJ T823-1 4.2 6.15 Autoretry
Pin Configuration
1 3 4
8 6 5
OUT V CC
MAX4987AE/
MAX4987BE
2
7
IN
*CONNECT EXPOSED
PAD TO GND.
GND CD- CD+
TDFN-EP
2mm x 3mm
TOP VIEW EN ACOK
*EP