MAXIM MAX14634

EVALUATION KIT AVAILABLE
MAX14634
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switch
General Description
Benefits and Features
The MAX14634 bidirectional battery switch features
reverse blocking capability to isolate the battery from the
system. The internal switch features ultra-low 7mI (typ)
on-resistance and operates from a +2.3V to +5.5V input
voltage range, making this device ideal as a batterydisconnect switch for high-capacity battery applications.
The slew-rate controlled switch is also ideal for a large
load capacitor as well as high-current load switching
applications.
SProvides Efficient System Battery Switch
Integrated FET for Bidirectional Blocking

Ultra-Low 7mI (typ) RON

Wide Input Voltage Range: +2.3V to +5.5V

Low Quiescent Current
SSaves Space
Integrated Pulldown and Logic Buffer Circuits
12-Bump, 1.3mm x 1.7mm, 0.4mm Pitch WLP Package
The device is available in an ultra-small 12-bump (1.3mm
x 1.7mm, 0.4mm pitch) WLP package. The tiny, lowprofile package is suitable for space-limited portable
device applications. The device operates over the -40NC
to +85NC extended temperature range.
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maximintegrated.com/MAX14634.related.
Applications
Tablet PC Battery Switches
Smartphone Battery Switches
Battery Isolators
Typical Operating Circuit
SYSTEM INPUT
POWER PATCH
CHARGER
CHARGER
OUTPUT
SWITCHING
REGULATOR
AND
CONTROL
SYSTEM
CONNECTOR
PWRA
PWRB
BATTERY
PACK
CONTROL
LOGIC
EN
GND
RPD
MAX14634
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-6370; Rev 1; 1/13
MAX14634
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switch
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
PWRA, PWRB, EN....................................................-0.3V to +6V
Current into PWRA, PWRB.................................................... Q7A
Continuous Power Dissipation (TA = +70NC)
WLP (derate 13.7mW/NC above +70NC)....................1096mW
Operating Temperature Range........................... -40NC to +85NC
Maximum Junction Temperature......................................+150NC
Storage Temperature Range............................. -65NC to +150NC
Soldering Temperature (reflow).......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
WLP
Junction-to-Ambient Thermal Resistance (qJA)...........73°C/W
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
ELECTRICAL CHARACTERISTICS
(VPWRA, VPWRB = 2.3V to 5.5V; TA = -40NC to +85NC, unless otherwise noted. Typical values are at VPWRA, VPWRB = 4.2V; CPWRA,
CPWRB = 0.1µF; TA = +25NC.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
1
FA
SUPPLY OPERATION
Operating Voltage
VPWRA
VPWRB
Quiescent Current
IPWRA
IPWRB
Transient Supply Current
Shutdown Current
2.3
VEN = 0.4V, no load
30
EN from high to low or low to high
ISHDN
VEN = 5.5V, (VPWRA = 5.5V, VPWRB =
open) or (VPWRB = 5.5V, VPWRA = open)
FA
1
FA
INTERNAL FET
On-Resistance Between PWRA
and PWRB
RON
TA = +25NC,
ILOAD = 100mA
VPWRA, VPWRB = 2.3V
8
13
VPWRA, VPWRB = 3.3V
7
10
mI
EN INPUT
EN Input Logic-High Voltage
VIH
EN Input Logic-Low Voltage
VIL
EN Internal Pulldown Resistor
1.6
V
500
RPD
0.4
V
700
kI
DYNAMIC
Turn-On Time
tON
Time from EN high-to-low signal to
VPWRB/A = 90% of VPWRA/B
3
ms
Turn-Off Time
tOFF
Time from EN low-to-high signal to
VPWRB/A = 10% of VPWRA/B,
RLOAD = 100I
3
ms
Note 2: All devices are 100% production tested at TA = + 25NC. Specifications over the operating temperature range are
guaranteed by design.
Maxim Integrated
2
MAX14634
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switch
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
5
4
3
2
7
6
5
4
3
2
1
1
0
0
0
1
2
3
4
5
6
MAX14634 toc03
VEN = 0V
45
40
35
30
25
VPWRA = 5V
20
15
VPWRA = 4.2V
10
VPWRA = 2.7V
5
0
0
1
2
3
4
5
6
-40
-15
10
35
85
60
PWRB VOLTAGE (V)
TEMPERATURE (°C)
PWRB QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
PWRA SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
PWRB SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
35
30
25
VPWRB = 5V
20
15
VPWRB = 4.2V
10
VPWRB = 2.7V
5
VPWRA = 5V, VPWRB = OPEN
4
VPWRA = 4.2V, VPWRB = OPEN
3
VPWRA = 2.7V, VPWRB = OPEN
2
1
0
VPWRA = 5V, VPWRB = 5V
-1
VPWRA = 4.2V, VPWRB = 5V
-40
-15
10
35
-40
85
60
-15
10
35
VPWRB = 4.2V, VPWRA = OPEN
3
VPWRB = 2.7V, VPWRA = OPEN
2
1
0
VPWRB = 5V, VPWRA = 5V
-1
VPWRB = 4.2V, VPWRA = 5V
VPWRB = 2.7V, VPWRA = 5V
-2
85
60
-40
-15
60
85
1.20
MAX14634 toc08
2.5
35
NORMALIZED ON-RESISTANCE
vs. LOAD CURRENT
MAX14634 toc07
VPWRB = OPEN
10
TEMPERATURE (ºC)
PWRA SHUTDOWN CURRENT
vs. EN VOLTAGE
3.0
VEN = 1.8V
VPWRB = 5V, VPWRA = OPEN
4
TEMPERATURE (ºC)
TEMPERATURE (°C)
1.15
VPWRA = 2.7V
NORMALIZED RON
PWRA SHUTDOWN CURRENT (µA)
5
VPWRA = 2.7V, VPWRB = 5V
-2
0
VEN = 1.8V
PWRB SHUTDOWN CURRENT (µA)
40
5
PWRA SHUTDOWN CURRENT (µA)
VEN = 0V
45
MAX14634 toc05
PWRA VOLTAGE (V)
50
PWRB QUIESCENT CURRENT (nA)
8
50
MAX14634 toc06
6
VEN = 0V
CPWRA = 1µF
CPWRB = 1µF
9
PWRA QUIESCENT CURRENT (nA)
7
MAX14634 toc04
PWRA QUIESCENT CURRENT (nA)
8
10
MAX14634 toc02
VEN = 0V
CPWRA = 1µF
CPWRB = 1µF
9
PWRB QUIESCENT CURRENT (nA)
10
PWRA QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
PWRB QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX14634 toc01
PWRA QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
2.0
VPWRA = 5.5V
1.5
1.0
VPWRA = 4.2V
VPWRA = 3.3V
0.5
VPWRA = 4.2V
1.05
1.00
VPWRA = 5V
0.95
0
0.90
0
1
2
3
4
EN VOLTAGE (V)
Maxim Integrated
1.10
5
6
0
1
2
3
4
5
6
LOAD CURRENT (A)
3
MAX14634
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switch
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
NORMALIZED ON-RESISTANCE
vs. PWRB VOLTAGE
1.3
1.1
1.0
0.9
0.8
1.2
1.1
1.0
0.9
0.8
0.7
0.7
0.6
0.6
ILOAD = 100mA
0.5
2
3
4
5
6
2
3
4
5
0.9
0.8
0.5
6
-40
-15
10
35
60
85
TEMPERATURE (°C)
MAX14634 toc12
5.0
VPWRA = 2.7V
VPWRA = 4.2V
4.5
RLOAD = 10I
4.0
3.5
TURN-OFF TIME (ms)
TURN-ON TIME (ms)
1.0
SWITCH TURN OFF-TIME
vs. TEMPERATURE
RLOAD = 10I
4.5
3.0
2.5
2.0
VPWRA = 4.2V
3.5
3.0
2.5
2.0
VPWRA = 2.7V
1.5
1.0
0.5
0.5
0
0
-40
-15
10
35
60
85
-40
TEMPERATURE (°C)
MAX14634 toc14
2ms /div
-15
10
35
60
85
TEMPERATURE (°C)
SWITCH-ON WAVEFORM
Maxim Integrated
1.1
VPWRB (V)
5.0
1.0
1.2
0.6
ILOAD = 100mA
0.5
SWITCH TURN ON-TIME
vs. TEMPERATURE
1.5
1.3
0.7
VPWRA (V)
4.0
VPWRA = 4.2V
ILOAD = 100mA
1.4
MAX14634 toc13
NORMALIZED RON
1.2
1.4
NORMALIZED RON
1.3
1.5
MAX14634 toc10
1.4
NORMALIZED RON
1.5
MAX14634 toc09
1.5
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
MAX14634 toc11
NORMALIZED ON-RESISTANCE
vs. PWRA VOLTAGE
SWITCH-OFF WAVEFORM
MAX14634 toc15
RLOAD = 10I
RLOAD = 10I
VEN
5V/div
VEN
5V/div
VPWRA
5V/div
VPWRA
5V/div
VPWRB
5V/div
VPWRB
5V/div
IPWRA
0.5A /div
IPWRA
0.5A /div
2ms /div
4
MAX14634
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switch
Bump Configuration
TOP VIEW
(BUMPS ON BOTTOM)
1
MAX14634
2
3
4
+ PWRB
PWRA
PWRB
EN
PWRB
PWRA
PWRB
PWRA
GND
PWRA
PWRB
PWRA
A
B
C
12-WLP
Bump Description
BUMP
NAME
A1, A3, B1,
B3, C3
PWRB
Power I/O
A2, B2, B4,
C2, C4
PWRA
Power I/O
A4
C1
Maxim Integrated
EN
GND
FUNCTION
Active-Low Enable Input. Drive EN low to turn on the switch.
Ground
5
MAX14634
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switch
Functional Diagram
INTERNAL BIAS
CIRCUIT
PWRB
PWRA
EN
GND
RPD
MAX14634
Detailed Description
The MAX14634 is a bidirectional switch with ultra-low 7mI
(typ) on-resistance and reverse-current blocking capability. The device has low quiescent current and operates
from a +2.3V to +5.5V input voltage range, making this
device ideal as a battery-disconnect switch for highcapacity battery applications. The slew-rate controlled
switch is also ideal for a large load capacitor as well as
high-current load switching applications.
Reverse-Current Blocking
The bidirectional FET switch prevents current flowing
from either power input to the other when the switch is
disabled.
EN Input
The switch position is controlled by an EN active-low
logic input. The switch is on when EN is logic-low and
off when EN is logic-high. EN is internally pulled down to
ground by RPD.
Maxim Integrated
Ordering Information
PART
TEMP
RANGE
TOP
MARK
PINPACKAGE
MAX14634EWC+T
-40NC to +85NC
ACO
12 WLP
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
12 WLP
W121F1+1
21-0449
Refer to Application
Note 1891
6
MAX14634
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switch
Revision History
REVISION
NUMBER
REVISION
DATE
0
5/12
Initial release
—
1
1/13
Updated Absolute Maximum Ratings section
2
DESCRIPTION
PAGES
CHANGED
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max
limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
© 2012 Maxim Integrated Products, Inc.
7
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.