MAX14634/MAX14680
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switches
Typical Operating Circuit
19-6370; Rev 2; 4/13
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.
EVALUATION KIT AVAILABLE
General Description
The MAX14634/MAX14680 bidirectional battery switches
feature reverse blocking capability to isolate the battery
from the system. These internal switches feature ultra-
low 7mI (typ) on-resistance and operate from a +2.3V to
+5.5V input voltage range, making these devices ideal
battery-disconnect switches for high-capacity battery
applications. The slew-rate controlled switches are also
ideal for a large load capacitor as well as high-current
load switching applications.
The devices are available in an ultra-small 12-bump
(1.3mm x 1.7mm, 0.4mm pitch) WLP package. The tiny,
low-profile package is suitable for space-limited portable
device applications. The devices operate over the -40NC
to +85NC extended temperature range.
Applications
Tablet PC Battery Switches
Smartphone Battery Switches
Battery Isolators
Benefits and Features
S Provide Efficient System Battery Switch
Integrated FET for Bidirectional Blocking
Ultra-Low 7mI (typ) RON
Wide +2.3V to +5.5V Input Voltage Range
Low Quiescent Current
S Save Space
Integrated Pulldown and Logic Buffer Circuits
12-Bump, 1.3mm x 1.7mm, 0.4mm Pitch WLP
Package
MAX14634
MAX14680
CONTROL
LOGIC
SWITCHING
REGULATOR
AND
CONTROL
SYSTEM
CONNECTOR
POWER PATCH
CHARGER
PWRB
CHARGER
OUTPUT
BATTERY
PACK
PWRA
GNDEN
(EN)
( ) MAX14680 ONLY
SYSTEM INPUT
RPD
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.
MAX14634/MAX14680
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switches
2Maxim Integrated
(All voltages referenced to GND.)
PWRA, PWRB, EN, 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
WLP
Junction-to-Ambient Thermal Resistance (qJA) ..........73°C/W
ABSOLUTE MAXIMUM RATINGS
Note 2: All devices are 100% production tested at TA = + 25NC. Specifications over the operating temperature range are
guaranteed by design.
Note 3: EN for MAX14634, EN for MAX14680.
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.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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)
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
SUPPLY OPERATION
Operating Voltage VPWRA
VPWRB 2.3 5.5 V
Quiescent Current IPWRA
IPWRB VEN = 0.4V (VEN = 1.6V), no load 1 FA
Transient Supply Current EN (EN) from high to low or low to high 30 FA
Shutdown Current ISHDN
VEN = 5.5V (VEN = 0V) , (VPWRA = 5.5V,
VPWRB = open) or (VPWRB = 5.5V, VPWRA
= open)
1FA
INTERNAL FET
On-Resistance Between PWRA
and PWRB RON TA = +25NC,
ILOAD = 100mA
VPWRA, VPWRB = 2.3V 8 13 mI
VPWRA, VPWRB = 3.3V 7 10
ENABLE INPUT (Note 3)
Enable Input Logic-High Voltage VIH 1.6 V
Enable Input Logic-Low Voltage VIL 0.4 V
Enable Internal Pulldown
Resistor RPD 500 700 kI
DYNAMIC
Turn-On Time tON Time from EN high-to-low (EN low-to-high)
signal to VPWRB/A = 90% of VPWRA/B 3 ms
Turn-Off Time tOFF
Time from EN low-to-high (EN high-to-low)
signal to VPWRB/A = 10% of VPWRA/B,
RLOAD = 100I
3 ms
MAX14634/MAX14680
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switches
3Maxim Integrated
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
PWRA QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX14634 toc01
PWRA VOLTAGE (V)
PWRA QUIESCENT CURRENT (nA)
54321
1
2
3
4
5
6
7
8
9
10
0
06
VEN = 0V, VEN = 5V
CPWRA = 1µF
CPWRB = 1µF
PWRB QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX14634 toc02
PWRB VOLTAGE (V)
PWRB QUIESCENT CURRENT (nA)
54321
1
2
3
4
5
6
7
8
9
10
0
06
VEN = 0V, VEN = 5V
CPWRA = 1µF
CPWRB = 1µF
PWRA QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX14634 toc03
TEMPERATURE (°C)
PWRA QUIESCENT CURRENT (nA)
603510-15
5
10
15
20
25
30
35
40
45
50
0
-40 85
VEN = 0V, VEN = 5V
VPWRA = 5V
VPWRA = 4.2V
VPWRA = 2.7V
PWRB QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX14634 toc04
TEMPERATURE (°C)
PWRB QUIESCENT CURRENT (nA)
603510-15
5
10
15
20
25
30
35
40
45
50
0
-40 85
VEN = 0V, VEN = 5V
VPWRB = 5V
VPWRB = 4.2V
VPWRB = 2.7V
PWRA SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX14634 toc05
TEMPERATURE (ºC)
PWRA SHUTDOWN CURRENT (µA)
603510-15
-1
0
1
2
3
4
5
-2
-40 85
VEN = 1.8V, VEN = 0V
VPWRA = 5V, VPWRB = OPEN
VPWRA = 4.2V, VPWRB = OPEN
VPWRA = 2.7V, VPWRB = OPEN
VPWRA = 5V, VPWRB = 5V
VPWRA = 4.2V, VPWRB = 5V
VPWRA = 2.7V, VPWRB = 5V
PWRB SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX14634 toc06
TEMPERATURE (ºC)
PWRB SHUTDOWN CURRENT (µA)
603510-15
-1
0
1
2
3
4
5
-2
-40 85
VPWRB = 5V, VPWRA = OPEN
VPWRB = 4.2V, VPWRA = OPEN
VPWRB = 2.7V, VPWRA = OPEN
VPWRB = 5V, VPWRA = 5V
VPWRB = 4.2V, VPWRA = 5V
VPWRB = 2.7V, VPWRA = 5V
VEN = 1.8V, VEN = 0V
PWRA SHUTDOWN CURRENT
vs. EN VOLTAGE
MAX14634 toc07
ENABLE VOLTAGE (V)
PWRA SHUTDOWN CURRENT (µA)
54321
0.5
1.0
1.5
2.0
2.5
3.0
0
06
VPWRB = OPEN
VPWRA = 5.5V
VPWRA = 4.2V
VPWRA = 3.3V
NORMALIZED ON-RESISTANCE
vs. LOAD CURRENT
MAX14634 toc08
LOAD CURRENT (A)
NORMALIZED RON
54321
0.95
1.00
1.05
1.10
1.15
1.20
0.90
06
VPWRA = 5V
VPWRA = 4.2V
VPWRA = 2.7V
MAX14634/MAX14680
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switches
4Maxim Integrated
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
NORMALIZED ON-RESISTANCE
vs. PWRA VOLTAGE
MAX14634 toc09
VPWRA (V)
NORMALIZED RON
543
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
0.5
26
ILOAD = 100mA
NORMALIZED ON-RESISTANCE
vs. PWRB VOLTAGE
MAX14634 toc10
VPWRB (V)
NORMALIZED RON
543
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
0.5
26
ILOAD = 100mA
NORMALIZED ON-RESISTANCE
vs. TEMPERATURE
MAX14634 toc11
TEMPERATURE (°C)
NORMALIZED RON
603510-15-40 85
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
0.5
VPWRA = 4.2V
ILOAD = 100mA
SWITCH TURN ON-TIME
vs. TEMPERATURE
MAX14634 toc12
TEMPERATURE (°C)
TURN-ON TIME (ms)
603510-15-40 85
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
RLOAD = 10I
VPWRA = 2.7V
VPWRA = 4.2V
SWITCH-ON WAVEFORM
MAX14634 toc14
VEN
5V/div
VPWRA
5V/div
VPWRB
5V/div
IPWRA
0.5A/div
2ms/div
RLOAD = 10I
SWITCH TURN OFF-TIME
vs. TEMPERATURE
MAX14634 toc13
TEMPERATURE (°C)
TURN-OFF TIME (ms)
603510-15-40 85
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
RLOAD = 10I
VPWRA = 4.2V
VPWRA = 2.7V
SWITCH-OFF WAVEFORM
MAX14634 toc15
VEN
5V/div
VPWRA
5V/div
VPWRB
5V/div
IPWRA
0.5A/div
2ms/div
RLOAD = 10I
MAX14634/MAX14680
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switches
5Maxim Integrated
Bump Description
Bump Configuration
MAX14634 MAX14680 NAME FUNCTION
A1, A3, B1,
B3, C3
A1, A3, B1,
B3, C3 PWRB Power I/O
A2, B2, B4,
C2, C4
A2, B2, B4,
C2, C4 PWRA Power I/O
A4 —EN Active-Low Enable Input. Drive EN low to turn on the switch.
— A4 EN Active-High Enable Input. Drive EN high to turn on the switch.
C1 C1 GND Ground
12 WLP
TOP VIEW
(BUMPS ON BOTTOM)
PWRAGND
PWRAPWRB
EN/(EN)PWRB
MAX14634
MAX14680
+
1
( ) MAX14680 ONLY
234
A
PWRAPWRB
PWRA PWRB
PWRA PWRB
B
C
MAX14634/MAX14680
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switches
6Maxim Integrated
Functional Diagram
Detailed Description
The MAX14634/MAX14680 bidirectional battery switches
feature reverse blocking capability to isolate the battery
from the system. These internal switches feature ultra-
low 7mI (typ) on-resistance and operate from a +2.3V to
+5.5V input voltage range, making these devices ideal
as battery-disconnect switches for high-capacity battery
applications. The slew-rate controlled switches are also
ideal for a large load capacitor as well as high-current
load switching applications.
The devices are available in an ultra-small 12-bump
(1.3mm x 1.7mm, 0.4mm pitch) WLP package. The tiny,
low-profile package is suitable for space-limited portable
device applications. The devices operate over the -40NC
to +85NC extended temperature range.
Reverse-Current Blocking
The bidirectional FET switch prevents current flowing from
either power input to the other when the switch is disabled.
EN/EN Input
The MAX14634’s 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.
The MAX14680’s switch position is controlled by an EN
active-high logic input. The switch is on when EN is logic-
high and off when EN is logic-low. EN is internally pulled
down to ground by RPD.
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel
Package Information
For the latest package outline information and land patterns (foot-
prints), 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.
Chip Information
PROCESS: BiCMOS
PART TEMP
RANGE
TOP
MARK
PIN-
PACKAGE
MAX14634EWC+T -40NC to +85NC ACO 12 WLP
MAX14680EWC+T -40NC to +85NC ACV 12 WLP
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
12 WLP W121F1+1 21-0542 Refer to Application
Note 1891
MAX14634
MAX14680
PWRB
PWRA
( ) MAX14680 ONLY
GNDEN/(EN)
RPD
INTERNAL BIAS
CIRCUIT
MAX14634/MAX14680
Ultra-Low On-Resistance and Compact
Bidirectional Battery Switches
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 7
© 2013 Maxim Integrated Products, Inc. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 5/12 Initial release —
1 1/13 Updated Absolute Maximum Ratings section 2
2 4/13 Added MAX14680 active-high part information to data sheet 1, 2, 3, 5, 6
