19-4356; Rev 0; 10/08
Battery Switch with Four Enable Inputs
MAX1425
General Description
Features
The MAX14525 features a low R
35mΩ (typ) load
ON
♦ Low 35mΩ (typ) R
Load Switch
ON
switch with four unique enable inputs. The MAX14525
is ideal for disconnecting the lithium-ion (Li+) battery
from the loads in portable devices such as cell phones.
The MAX14525 operates from a +2.2V to +5.5V supply
voltage.
♦ Ultra Low, 0.8µA (typ) Supply Current
♦ Four Enable Inputs:
TA: +28V (max) Capable
ON_K: Accurate +3V Trigger Enable
JIG: Factory Mode Enable
The MAX14525 features an extremely low 0.8µA (typ)
quiescent supply current to maximize battery life in
portable devices. It is enabled from four possible
inputs: external charger connection capable of high
voltage up to +28V, travel adapter (TA), on key (ON_K),
factory mode enable (JIG), and switch enable (S_EN).
The S_EN input is internally ANDed with the switched
battery connection (IN).
S_EN: Logically ANDed with IN
♦ Space-Saving 8-Pin, 2mm x 2mm TDFN Package
♦ Controlled Turn-On to Limit dI/dt Pulses Due to
Lead Inductance
The MAX14525 is available in a small 8-pin, 2mm x
2mm TDFN package and operates over the -40°C to
+85°C extended temperature range.
Applications
Ordering Information
Cell Phones
PDAs
PART
PIN-PACKAGE
TOP MARK
MAX14525ETA+T
8 TDFN-EP*
ACQ
GPS
Note: The device is specified over the -40°C to +85°C operating
temperature range.
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
UMPC Computers
Digital Cameras
Typical Application Circuit
Pin Configuration
TOP VIEW
MAX14525
BAT
IN
AC
ADAPTER
CHARGER
ON_K
Li-ION
BATTERY
BAT
JIG
+
IN
1
2
3
4
8
7
6
5
ON
BUTTON
PHONE
LOADS
IN
3.0V
MAX14525
*EP
ON_K
S_EN
TA
TA
SLEW RATE
CONTROL
GND
2V
JIG
P
S_EN
GND
TDFN-EP
2mm x 2mm
*CONNECT EXPOSED PAD TO GND.
________________________________________________________________ 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.