MP62350/MP62351
The Future of Analog IC Technology
3.3V/5V, Dual-Channel, 500mA
Current-Limited Power Distribution Switches
With Output Discharge
DESCRIPTION
FEATURES
The MP62350/MP62351 Power Distribution
Switch features internal current limiting to
prevent damage to host devices due to faulty
load conditions. The MP62350/MP62351
analog switch has 85mΩ on-resistance and
operates from 2.7V to 5.5V input. It is available
with guaranteed current limits, making it ideal
for
load
switching
applications.
The
MP62350/MP62351 has built-in protection for
both over current and increased thermal stress.
For over current, the device will limit the current
by changing to a constant current mode.
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As the temperature increases as a result of
short circuit, then the device will shut off. The
device will recover once the device temperature
reduces to approx 120°C.
500mA Continuous Current
Accurate Current Limit
Output Discharge Function
2.7V to 5.5V Supply Range
140uA Quiescent Current
85mΩ MOSFET
Thermal-Shutdown Protection
Under-Voltage Lockout
8ms FLAG Deglitch Time
No FLAG Glitch During Power Up
Reverse Current Blocking
Active High & Active Low Options
UL Recognized: Pending
APPLICATIONS
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The MP62350/MP62351 included a discharge
function that provides a resistive discharge path
for the external output capacitor when the part
is disabled.
The MP62350/MP62351 is available in 8-pin
MSOP and SOIC packages.
Smartphone and PDA
Portable GPS Device
Notebook PC
Set-top-box
Telecom and Network Systems
PC Card Hot Swap
USB Power Distribution
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
+5V
6 GND
7 IN
FLAG1 2
8
OUT1
To USB Controller
Output 1
MP62350
1
4
EN1
EN2
OUT2
5
Output 2
FLAG2 3
DUAL-CHANNEL
MP62350/MP62351 Rev. 0.91
www.MonolithicPower.com
9/18/2009
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© 2009 MPS. All Rights Reserved.
1
MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
ORDERING INFORMATION
Part Number
Enable
Switch
Maximum
Continuous
Load Current
Typical ShortCircuit Current
@ TA=25C
Package
Temperature
MP62351ES
MP62351EK
MP62350ES
MP62350EK
Active High
Active High
Active Low
Active Low
Dual
Dual
Dual
Dual
0.5A
0.5A
0.5A
0.5A
750mA
750mA
750mA
750mA
SOIC8
MSOP8
SOIC8
MSOP8
–20°C to +85°C
* For Tape & Reel, add suffix –Z (eg. MP62350/MP62351ES–Z). For RoHS Compliant Packaging, add suffix –LF
(eg. MP62350/MP62351ES–LF–Z)
PACKAGE REFERENCE
TOP VIEW
TOP VIEW
EN1*
1
8
OUT1
FLAG1
2
7
IN
FLAG2
3
6
GND
EN2*
4
5
OUT2
EN1*
1
8
OUT1
FLAG1
2
7
IN
FLAG2
3
6
GND
EN2*
4
5
OUT2
MSOP8
SOIC8
*: EN is active high for MP62351
ABSOLUTE MAXIMUM RATINGS (1)
Thermal Resistance
(3)
IN .................................................-0.3V to +6.0V
EN, FLAG, OUT to GND ..............-0.3V to +6.0V
Continuous Power Dissipation (TA = +25°C) (2)
SOIC8……………………………………......1.4W
MSOP8……………………………………....0.8W
Junction Temperature ...............................150°C
Lead Temperature ....................................260°C
Storage Temperature............... –65°C to +150°C
Operating Temperature.............. –20°C to +85°C
SOIC8..................................... 90 ...... 42... °C/W
MSOP8 .................................. 150 ..... 65... °C/W
θJA
θJC
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ(MAX), the junction-toambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD(MAX)=(TJ(MAX)TA)/θJA. Exceeding the maximum allowable power dissipation
will cause excessive die temperature, and the regulator will go
into thermal shutdown. Internal thermal shutdown circuitry
protects the device from permanent damage.
3) Measured on JESD51-7， 4-layer PCB.
MP62350/MP62351 Rev. 0.91
www.MonolithicPower.com
9/18/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
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MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
ELECTRICAL CHARACTERISTICS (4)
VIN=5V, TA=+25°C, unless otherwise noted.
Parameter
Condition
IN Voltage Range
Supply Current
Supply Current
Shutdown Current
Off Switch Leakage
Under-voltage Lockout
Under-voltage Hysteresis
FET On Resistance
EN Input Logic High Voltage
EN Input Logic Low Voltage
FLAG Output Logic Low Voltage
FLAG Output High Leakage
Current
Thermal Shutdown
Thermal Shutdown Hysteresis
Current Ramp (slew rate≤100A/s) on
Output
Rising Edge
5.5
V
90
120
μA
140
160
μA
1
1.95
250
85
μA
μA
1100
mA
1.4
A
2.65
0.8
0.4
V
mV
mΩ
V
V
V
1
μA
0.5
0.5
3
°C
°C
ms
ms
ms
ms
ms
10
ms
130
2
ISINK=5mA
VIN=VFLAG=5.5V
Turn Off Time, Toff (8)
CL=100μF, RL=11Ω
Discharge Resistance
FLAG Deglitch Time
ENx Input Leakage
Reverse Leakage Current
Units
1
1
IOUT=100mA ( -20°C≤TA≤85°C)
Turn On Time, Ton (7)
VOUT Falling Time, Tf (6)
Max
550
VIN=5.5V, CL=1uF, RL=11Ω
VIN=2.7V, CL=1uF, RL=11Ω
VIN=5.5V, CL=1uF, RL=11Ω
VIN=2.7V, CL=1uF, RL=11Ω
CL=100μF, RL=11Ω
VOUT Rising Time, Tr (5)
Typ
2.7
One Channel Enabled, IOUT=0, One
Switch ON
Both Channels Enabled, IOUT=0, Both
Switches ON
Device Disable, VOUT=float, VIN=5.5V
Device Disable, VIN=5.5V
Current Limit
Trip Current
Min
140
20
0.9
1.7
4
OUTX=5.5V, IN=GND
100
8
1
0.2
15
Ω
ms
μA
μA
Notes:
4) Production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.
5) Measured from 10% to 90%.
6) Measured from 90% to 10%.
7) Measured from (50%) EN signal to (90%) output signal.
8) Measured from (50%) EN signal to (10%) output signal.
MP62350/MP62351 Rev. 0.91
www.MonolithicPower.com
9/18/2009
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© 2009 MPS. All Rights Reserved.
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MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
PIN FUNCTIONS
MP62350/MP62351
Pin#
Name
Description
Active Low: (MP62350), Active High: (MP62351)
1
EN1
2
FLAG1
IN-to-OUT1 Over-current, active-low output flag. Open-Drain.
3
FLAG2
IN-to-OUT2 Over-current, active-low output flag. Open-Drain.
4
5
6
7
8
EN2
OUT2
GND
IN
OUT1
Active Low: (MP62350), Active High: (MP62351)
IN-to-OUT2 Power-Distribution Switch Output.
Ground.
Input Voltage. Accepts 2.7V to 5.5V input.
IN-to-OUT1 Power-Distribution Switch Output
TYPICAL PERFORMANCE CHARACTERISTICS
TA = +25ºC, unless otherwise noted.
OUTX
RL
tf
tr
CL
VO(OUTX)
90%
10%
90%
10%
TEST CIRCUIT
50%
50%
50%
VI(ENX)
50%
VI(ENX)
toff
ton
VO(OUTX)
90%
ton
VO(OUTX)
10%
toff
90%
10%
VOLTAGE WAVEFORMS
Figure 1—Test Circuit and Voltage Waveforms
MP62350/MP62351 Rev. 0.91
www.MonolithicPower.com
9/18/2009
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© 2009 MPS. All Rights Reserved.
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MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
TYPICAL PERFORMANCE CHARACTERISTICS
VIN=5V, VEN=0V, CL=1uF, TA = +25ºC, unless otherwise noted.
3
2.5
2
1.5
1.5
2.6
1.4
RISE TIME(ms)
TURN OFF DELAY (ms)
TURN ON DELAY (ms)
1.6
2.7
3.5
2.5
2.4
1.3
1.2
1.1
1
2.3
0.9
0.8
2.2
1
2.5
3
3.5 4 4.5 5
INPUT VOTAGE (V)
5.5
6
2.5
3
3.5 4 4.5 5
INPUT VOTAGE (V)
5.5
2.5
6
110
SUPPLY CURRENT (uA)
50
45
40
35
30
100
90
80
70
60
2.5
3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
6
INPUT TO OUTPUT VOLTAGE (mV)
IOUT=0.5A
130
120
110
100
90
80
70
2.5
3
3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
3 3.5 4 4.5 5 5.5
INPUT VOLTAGE (V)
6
6
6
IOUT=0.1A
30
25
20
15
10
5
0
-5
-10
-15
-20
-25
-30
-30 -15 0
Input to Output Voltage
vs. Load Current
Static Drain-Source
On-State Resistance
vs. Input Voltage
140
2.5
15 30 45 60 75 90
Current Limit vs.
Input Voltage
0.9
90
80
Vin=2.7V
70
60
50
40
30
Vin=3.3V
Vin=5.5V
Vin=5V
Vin=4V
20
CURRENT LIMIT (A)
FALL TIME (us)
55
3.5 4 4.5 5 5.5
INPUT VOTAGE (V)
Static Drain-Source
On-State Resistance Variation
vs. Ambient Temperature
STATIC DRAIN-SOURCE ON-STATE
RESISTANCE VARIATION (%)
Supply Current, Output
Enabled vs. Input Voltage
3
0.85
0.8
0.75
0.7
10
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7
OUTPUT CURRENT (A)
0.65
2.5
3
3.5
4
4.5
5
5.5
6
INPUT VOLTAGE (V)
MP62350/MP62351 Rev. 0.91
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9/18/2009
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© 2009 MPS. All Rights Reserved.
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MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN=5V, VEN=0V, CL=1uF, TA = +25ºC, unless otherwise noted.
1.2
1.1
1
0.9
0.8
0.7
2.5
3 3.5
4 4.5
5 5.5
Turn Off Delay and Fall Time
with Output Discharge
Current Limit Response
vs. Peak Current
CURRENT LIMIT RESPONSE TIME (us)
THRESHOLD TRIP CURRENT (A)
Threshold Trip Current
vs. Input Voltage
6
IOUT=0A
28
24
20
VOUT
2V/div
16
12
EN
5V/div
8
4
0
INPUT VOLTAGE (V)
0
2
4
6
8
10
12
14
Flag
5V/div
IOUT
500mV/div
PEAK CURRENT (A)
Turn On Delay and Rise Time
with 1uF Load
Turn Off Delay and Fall Time
with 1uF Load
Turn On Delay and Rise Time
with 100uF Load
IOUT=0.5A
IOUT=0.5A
IOUT=0.5A
VOUT
2V/div
VOUT
2V/div
VOUT
2V/div
EN
5V/div
EN
5V/div
EN
5V/div
Flag
5V/div
IOUT
500mV/div
Flag
5V/div
IOUT
500mV/div
Flag
5V/div
IOUT
500mV/div
Turn Off Delay and Fall Time
with 100uF Load
Threashold Trip Current
with Ramped Load
on Enabled Device
IOUT=0.5A
VOUT
2V/div
VOUT
2V/div
EN
5V/div
IOUT
200mA/div
Flag
5V/div
IOUT
500mV/div
EN
5V/div
IOUT
500mA/div
4ms/div
MP62350/MP62351 Rev. 0.91
www.MonolithicPower.com
9/18/2009
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© 2009 MPS. All Rights Reserved.
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MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN=5V, VEN=0V, CL=1uF, TA = +25ºC, unless otherwise noted.
Ramped Load
on Enabled Device
Inrush Current with
Different Load Capacitance
IOUT=0.5A
Flag
5V/div
Flag
5V/div
IOUT
200mA/div
IOUT
500mA/div
IOUT
1A/div
EN
5V/div
2ms/div
1ms/div
MP62350/MP62351 Rev. 0.91
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9/18/2009
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2ms/div
7
MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
FUNCTION BLOCK DIAGRAM
Thermal
Sense
FLAG1
Deglitch
EN1
+
Logic
AMP
--
Charge
Pump
OUT1
Current
Sense
UVLO
+
EN
Vref
-
IN
Current
Sense
Charge
Pump
-Logic
OUT2
EN
AMP
+
FLAG2
EN2
Deglitch
Thermal
Sense
GND
Figure 2—Functional Block Diagram
MP62350/MP62351 Rev. 0.91
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9/18/2009
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© 2009 MPS. All Rights Reserved.
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MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
DETAILED DESCRIPTION
Over Current
When the load exceeds trip current (minimum
threshold current triggering constant-current
mode) or a short is present, MP62350/MP62351
switches into to a constant-current mode (current
limit value). MP62350/MP62351 will be shutdown
only if the overcurrent condition stays long
enough to trigger thermal protection.
Trigger overcurrent protection for different
overload conditions occurring in applications:
1) The output has been shorted or overloaded
before the device is enabled or input applied.
MP62350/MP62351 detects the short or
overload and immediately switches into a
constant-current mode.
2) A short or an overload occurs after the device
is enabled. After the current-limit circuit has
been tripped (reached the trip current
threshold), the device switches into constantcurrent mode. However, high current may
flow for a short period of time before the
current-limit circuit can react.
3) Output current has been gradually increased
beyond the recommended operating current.
The load current rises until the trip current
threshold is reached or until the thermal limit
of
the
device
is
exceeded.
The
MP62350/MP62351 is capable of delivering
current up to the trip current threshold without
damaging the device. Once the trip threshold
has been reached, the device switches into
its constant-current mode.
Thermal Protection
The purpose of thermal protection is to prevent
damage in the IC by allowing exceptive current to
flow and heating the junction. The die
temperature is internally monitored until the
thermal limit is reached. Once this temperature is
reached, the switch will turn off and allow the
chip to cool. The switch has a built-in hysteresis.
Under-voltage Lockout (UVLO)
This circuit is used to monitor the input voltage to
ensure that the MP62350/MP62351 is operating
correctly. This UVLO circuit also ensures that
there is no operation until the input voltage
reaches the minimum spec.
Enable
The logic pin disables the chip to reduce the
supply current. The device will operate once the
enable signal reaches the appropriate level. The
input is compatible with both COMS and TTL.
Flag Response
The FLAG pin is an open drain configuration.
This FAULT will report a fail mode after an 8ms
deglitch timeout. This is used to ensure that no
false fault signals are reported. This internal
deglitch circuit eliminates the need for extend
components. The FLAG pin is not deglitched
during an over temp. or a voltage lockout.
MP62350/MP62351 Rev. 0.91
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9/18/2009
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© 2009 MPS. All Rights Reserved.
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MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
APPLICATION INFORMATION
Power-Supply Considerations
Over 10μF capacitor between IN and GND is
recommended. This precaution reduces powersupply transients that may cause ringing on the
input and improves the immunity of the device to
short-circuit transients.
In order to achieve smaller output load transient
ripple, placing a high-value electrolytic capacitor
on the output pin(s) is recommended when the
load is heavy.
+5V
6 GND
7 IN
FLAG1 2
8
OUT1
To USB Controller
Output 1
MP62350
1
4
EN1
EN2
OUT2
5
Output 2
FLAG2 3
DUAL-CHANNEL
Figure 3—Application Circuit
MP62350/MP62351 Rev. 0.91
www.MonolithicPower.com
9/18/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
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MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
PACKAGE INFORMATION
MSOP8
0.114(2.90)
0.122(3.10)
5
8
0.114(2.90)
0.122(3.10)
PIN 1 ID
(NOTE 5)
0.010(0.25)
0.014(0.35)
0.187(4.75)
0.199(5.05)
4
1
0.0256(0.65)BSC
BOTTOM VIEW
TOP VIEW
GAUGE PLANE
0.010(0.25)
0.030(0.75)
0.037(0.95)
0.043(1.10)MAX
SEATING PLANE
0.002(0.05)
0.006(0.15)
FRONT VIEW
0o-6o
0.016(0.40)
0.026(0.65)
0.004(0.10)
0.008(0.20)
SIDE VIEW
NOTE:
0.181(4.60)
0.040(1.00)
0.016(0.40)
1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS
IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSION OR GATE BURR.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR
PROTRUSION.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.004" INCHES MAX.
5) PIN 1 IDENTIFICATION HAS HALF OR FULL CIRCLE OPTION.
6) DRAWING MEETS JEDEC MO-187, VARIATION AA.
7) DRAWING IS NOT TO SCALE.
0.0256(0.65)BSC
RECOMMENDED LAND PATTERN
MP62350/MP62351 Rev. 0.91
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9/18/2009
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MP62350/MP62351 –CURRENT-LIMITED POWER DISTRIBUTION SWITCHES
SOIC8
0.189(4.80)
0.197(5.00)
0.050(1.27)
0.024(0.61)
8
5
0.063(1.60)
0.150(3.80)
0.157(4.00)
PIN 1 ID
1
0.228(5.80)
0.244(6.20)
0.213(5.40)
4
TOP VIEW
RECOMMENDED LAND PATTERN
0.053(1.35)
0.069(1.75)
SEATING PLANE
0.004(0.10)
0.010(0.25)
0.013(0.33)
0.020(0.51)
0.0075(0.19)
0.0098(0.25)
SEE DETAIL "A"
0.050(1.27)
BSC
SIDE VIEW
FRONT VIEW
0.010(0.25)
x 45o
0.020(0.50)
GAUGE PLANE
0.010(0.25) BSC
0o-8o
0.016(0.41)
0.050(1.27)
DETAIL "A"
NOTE:
1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN
BRACKET IS IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSIONS.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.004" INCHES MAX.
5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA.
6) DRAWING IS NOT TO SCALE.
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not
assume any legal responsibility for any said applications.
MP62350/MP62351 Rev. 0.91
www.MonolithicPower.com
9/18/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2009 MPS. All Rights Reserved.
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