APL3522

APL3522A/B
Power-Distribution Switches with Discharge
Features
General Description
•
•
•
60mΩ High Side MOSFET
The APL3522A/B is a power-distribution switch with some
2.5A Continuous Current
protection functions that can deliver current up to 2.5A.
The device incorporates a 60mΩ N-channel MOSFET
Programmable VOUT Discharge Function by DIS
power switch that is controlled by an enable logic pin and
dedicated to soft-start ramp-up rate control that can be
Pin
•
•
•
•
•
•
Wide Supply Voltage Range: 2.7V to 5.5V
used in application where the inrush current is concerned.
It can be programmable VOUT discharge function by DIS
Current-Limit and Short-Circuit Protections
Under-Voltage Lockout Protection
pin.
The device integrates some protection features, including current-limit protection, short-circuit protection, over-
Reverse Current Blocking when Switch Disabled
Over-Temperature Protection
temperature protection, and UVLO. The current-limit and
short-circuit protection can protect down-stream devices
Logic Level Enable Input
APL3522A: Active High
from catastrophic failure by limiting the output current at
current-limit threshold during over-load or short-circuit
APL3522B: Active Low
•
Lead Free and Green Devices Available
events. When VOUT drops below VIN-1.5V the devices limit
the current to a lower and safe level. The over-tempera-
(RoHS Compliant)
Applications
ture protection function shuts down the N-channel
MOSFET power switch when the junction temperature
•
•
•
•
rises beyond 140oC and will automatically turns on the
power switch when the temperature drops by 20oC. The
TFT LCD Modules
Notebook and Desktop Computers
UVLO function keeps the power switch in off state until
there is a valid input voltage present.
USB Ports
High-Side Power Protection Switches
The device is available in lead free SOT-23-5 packages
with enable active-high(EN) and active-low(ENB) versions.
Simplified Application Circuit
APL3522A/B
VIN
EN
Control
VIN
VOUT
EN/ENB
DIS
VOUT
GND
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2014
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APL3522A/B
Pin Configuration
5 VIN
VOUT 1
GND 2
EN 3
5 VIN
VOUT 1
GND 2
ENB 3
4 DIS
SOT-23-5
APL3522A
4 DIS
SOT-23-5
APL3522B
Ordering and Marking Information
EN Function
A : Active High B : Active Low
Package Code
B : SOT-23-5
Operating Ambient Temperature Range
I : -40 to 85 oC
Handling Code
TR : Tape & Reel
Assembly Material
G : Halogen and Lead Free Device
APL3522
Assembly Material
Handling Code
Temperature Range
Package Code
EN Function
APL3522A B:
22AX
X - Date Code
APL3522B B:
22BX
X - Date Code
Note : ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant)and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Absolute Maximum Ratings
Symbol
(Note 1)
Rating
Unit
VIN to GND Voltage
-0.3 ~ 6
V
VOUT to GND Voltage
-0.3 ~ 6
V
EN, ENB to GND Voltage
-0.3 ~ 6
V
VDIS
DIS to GND Voltage
-0.3 ~ 6
V
IOUT
Continuous Output Current
VIN
VOUT
VENB, VEN
TJ
TSTG
TSDR
Parameter
Internally Limited
Maximum Junction Temperature
Storage Temperature
Maximum Lead Soldering Temperature, 10 Seconds
A
-40 ~ 150
o
-65 ~ 150
o
260
o
C
C
C
Note1: 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 under "recommended operating conditions" is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliability.
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APL3522A/B
Thermal Characteristics
Symbol
θJA
Parameter
Typical Value
Junction-to-Ambient Resistance in Free Air (Note 2)
Unit
o
SOT-23-5
C/W
250
Note 2: θJA is measured with the component mounted on a high effective thermal conductivity test board in free air.
Recommended Operating Conditions (Note 3)
Parameter
Symbol
VIN
VIN Input Voltage
IOUT
OUT Output Current
Range
Unit
2.7 ~ 5.5
V
0 ~ 2.5
A
TA
Ambient Temperature
-40 ~ 85
o
TJ
Junction Temperature
-40 ~ 125
o
C
C
Note 3: Refer to the typical application circuit.
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APL3522A/B
Electrical Characteristics
Unless otherwise specified, these specifications apply over VIN=5V, VEN=5V or VENB=0V and TA=25oC.
Symbol
Parameter
APL3522A/B
Test Conditions
Min.
Typ.
Unit
Max.
SUPPLY CURRENT
No load, VEN=0V or VENB=5V
-
-
1
µA
No load, VEN=5V or VENB=0V
-
60
100
µA
Leakage Current
VOUT=GND, VEN=0V or VENB=5V
-
-
1
µA
Reverse Leakage Current
VIN=GND, VOUT=5V, VEN=0V or VENB=5V
-
-
1
µA
IOUT=1.5A, TA=25oC
-
60
70
mΩ
2.3
-
2.65
V
-
0.2
-
V
VIN Supply Current
POWER SWITCH
RDS(ON)
Power Switch On Resistance
UNDER-VOLTAGE LOCKOUT
VIN UVLO Threshold Voltage
VIN rising, TA=-40~85oC
VIN UVLO Hysteresis
CURRENT-LIMIT AND SHORT-CIRCUIT PROTECTIONS
ILIM
ISHORT
Current-Limit Threshold
VIN=2.7V to 5.5V, TA=-40~85oC
3.5
4
4.6
A
Short-Circuit Output Current
VIN=2.7V to 5.5V
-
0.8
-
A
VIN=3.3V, No load, COUT=1µF
1
2
3
ms
V
SOFT-START CONTROL PIN
tSS
Soft-Start Time
EN OR ENB INPUT PIN
VIH
Input Logic HIGH
VIN=2.7V to 5V
2
-
-
VIL
Input Logic LOW
VIN=2.7V to 5V
-
-
0.8
V
-
-
1
µA
VEN=0V or VENB=5V
-
42
-
Ω
TJ rising
-
140
-
°C
-
20
-
°C
Input Current
DIS Discharge Resistance
OVER-TEMPERATURE PROTECTION (OTP)
TOTP
Over-Temperature Threshold
Over-Temperature Hysteresis
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APL3522A/B
Typical Operating Characteristics
Current Limit Threshold vs .
Input Voltage
Switch On Resistance vs. Input
Voltage
4.14
Current Limit Threshold, ILIM (Α)
Switch On Resistance , RDS(on) (mΩ)
80
70
60
50
40
30
20
10
4 .08
4 .06
4 .04
4 .02
4.00
3 .98
CIN =COUT =1µF/X7R, TA=25℃
TA =25℃
3 .96
0
2.5
3
3.5
4
4.5
5
5.5
2.5
6
3
3.5
Foldback Current Limit Threshold, ISHORT (A)
105
Supply Current, ICC (uA)
100
95
90
85
80
75
70
RLOAD = Open,
CIN =COUT =1µF/X7R, TA=25℃
60
3
3.5
4
4.5
5.5
6
5
5.5
6
2.0
1.6
1.2
0.8
0.4
TA=25℃
0
2.5
3.5
Input Voltage (V)
4.5
5.5
6.5
Input Voltage (V)
EN pin Threshold Voltage vs.
Input Voltage
Current Limit Response vs. Onput
Peak Current
60
2.5
Current Limit Response (us)
EN pin Threshold Voltage, VEN (V)
5
Foldback Current Limit Threshold
vs. Input Voltage
Supply Current vs. Input Voltage
2.5
4.5
Input Voltage (V)
Input Voltage (V)
65
4
2
EN Rising
1.5
EN Falling
1
0.5
50
40
30
20
10
RLOAD = Open,
CIN =COUT =1µF/X7R, TA=25℃
TA=25℃
0
0
2.5
3
3.5
4
4.5
5
5.5
2.5
6
Input Voltage (V)
Copyright  ANPEC Electronics Corp.
Rev. A.3 - Mar., 2014
4.5
6.5
8.5
10.5
12.5
Output Peak Current (A)
5
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APL3522A/B
Operating Waveforms
The test condition is VIN=5V, TA= 25oC unless otherwise specified.
Power Off
Power On
VIN
1
1
2
2
3
3
V OUT
IOUT
VIN =5V, RLOAD =30Ω, CIN =1uF, COUT =10µF,
RDIS =100kΩ
CH1: VIN, 2V/Div, DC
CH2: VOUT , 2V/Div, DC
CH3: IOUT , 0.2A/Div, DC
TIME:200ms/Div
VIN =5V, RLOAD =30Ω, CIN =1uF, COUT =10µF
CH1: VIN, 2V/Div, DC
CH2: VOUT , 2V/Div, DC
CH3: IOUT , 0.2A/Div, DC
TIME:4ms/Div
Turn Off Response
Turn On Response
VEN
1
1
VOUT
2
2
I OUT
3
3
VIN =5V, RLOAD =30Ω, CIN =1uF, COUT =10µF,
RDIS =100kΩ
CH1: VEN, 5V/Div, DC
CH2: VOUT , 2V/Div, DC
CH3: IOUT , 0.2A/Div, DC
TIME:2ms/Div
VIN =5V, RLOAD =30Ω, CIN =1uF, COUT =10µF
CH1: VEN, 5V/Div, DC
CH2: VOUT , 2V/Div, DC
CH3: IOUT , 0.2A/Div, DC
TIME:2ms/Div
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APL3522A/B
Operating Waveforms
The test condition is VIN=5V, TA= 25oC unless otherwise specified.
Short Circuit Protection
Current Limit Protection
1
1
2
2
3
3
VIN =5V, VOUT short to ground, CIN =1uF,
COUT =100uF
CH1: VIN, 2V/Div, DC
CH2: VOUT , 2V/Div, DC
CH3: IOUT , 10A/Div, DC
TIME: 100us/Div
VIN =5V, CIN =1uF, COUT=10uF
CH1: VIN, 2V/Div, DC
CH2: VOUT, 2V/Div, DC
CH3: IOUT, 2A/Div, DC
TIME: 0.4ms/Div
Vout Discharge Time
RDISR=DIS=10kΩ
RDIS
RDIS
= =51kΩ
RDISR=DIS=100kΩ
13
R =
==1MΩ
RDISDIS
=510kΩ RRDIS
DIS
EN
Vin=5V, Cin=1uF, Cout=10uF
CH1: Vout (1V/Div)
CH3: EN (1V/Div)
Time: 1s/Div
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APL3522A/B
Pin Description
PIN
FUNCTION
NO.
NAME
1
VOUT
Output Voltage Pin. The output voltage follows the input voltage. When ENB is high or EN is low
the output voltage is discharged by an internal resistor.
2
GND
Ground
3
EN
(APL3522A)
Enable Input. Pull this pin to high to enable the device and pull this pin to low to disable device. The
EN pin cannot be left floating.
ENB
(APL3522B)
Enable Input. Pull this pin to high to disable the device and pull this pin to low to enable device. The
ENB pin cannot be left floating.
4
DIS
Discharge Control Pin. Connect a resistor to VOUT to adjust discharge time.
5
VIN
Power Supply Input. Connect this pin to external DC supply.
Block Diagram
VIN
VOUT
UVLO
Charge
Pump
Current
Limit
DIS
Soft Start
Gate Driver and Control Logic
EN/ENB
GND
OTP
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APL3522A/B
Typical Application Circuit
APL3522 A/B
V IN
VIN
CIN
EN
Control
VOUT
VOUT
1µF
C BY
0 .1µ F
C OUT
10µF
100Ω
EN/ENB
DIS
R DIS
GND
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APL3522A/B
Function Description
VIN Under-Voltage Lockout (UVLO)
Over-Temperature Protection
The APL3522A/B power switch is built-in an under-voltage lockout circuit to keep the output shut off until internal
When the junction temperature exceeds 140oC, the internal thermal sense circuit turns off the power FET and
circuitry is operating properly. The UVLO circuit has hysteresis and a de-glitch feature so that it will typically ig-
allows the device to cool down. When the device’s junction temperature cools by 20 oC, the internal thermal
nore undershoot transients on the input. When input voltage exceeds the UVLO threshold, the output voltage starts
sense circuit will enable the device, resulting in a pulsed
output during continuous thermal protection. Thermal
a soft-start to reduce the inrush current.
protection is designed to protect the IC in the event of
over-temperature conditions. For normal operation, the
Power Switch
junction temperature cannot exceed TJ=+125oC.
The power switch is an N-channel MOSFET with a low
RDS(ON). The internal power MOSFET does not have the
body diode. When IC is off, the MOSFET prevents a cur-
Adjustable VOUT Discharge Functiom
rent flowing from the VOUT back to VIN and VIN to VOUT.
It can be programmable VOUT discharge function by RDIS.
When ENB is high, or EN is low, It can be discharge from
Current-Limit Protection
VOUT to DIS.
The APL3522A/B power switch provides the current-limit
protection function. During current-limit, the devices limit
output current at current-limit threshold. For reliable
operation, the device should not be operated in currentlimit for extended period.
Short-Circuit Protection
When the output voltage drops below VIN-1.5V, which is
caused by the over load or short-circuit, the devices limit
the output current down to a safe level. The short circuit
current-limit is used to reduce the power dissipation during short-circuit condition. If the junction temperature is
over the thermal shutdown temperature, the device will
enter the thermal shutdown.
Soft-Start
The APLA3522A/B provides an internal soft-start circuitry
to control rise rate of the output voltage and limit the current surge during start-up.
Enable/Disable
Pull the ENB above 2V, or EN below 0.8V to disable the
device and pull ENB pin below 0.8V or EN above 2V to
enable the device. When the IC is disabled, the supply
current is reduced to less than 1µA. The enable input is
compatible with both TTL and CMOS logic levels. The
EN/ENB pins cannot be left floating.
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APL3522A/B
Application Information
Recommended Minimum Footprint
Input Capacitor
0.075
A 1µF ceramic bypass capacitor from VIN to GND, located
near the APL3522, is strongly recommended to suppress
the ringing during short-circuit fault event. Without the by-
0.1
pass capacitor, the output short may cause sufficient ringing on the input (from supply lead inductance) to damage
internal control circuitry.
0.05
Output Capacitor
A low-ESR 10µF MLCC, aluminum electrolytic or tantalum between VOUT and GND is strongly recommended
0.037
to reduce the voltage droop during hot-attachment of
downstream peripheral. Higher-value output capacitor is
0.02
Unit : Inch
better when the output load is heavy. Additionally, bypassing the output with a 0.1µF ceramic capacitor improves
SOT-23-5
the immunity of the device to short-circuit transients.
Layout Consideration
The PCB layout should be carefully performed to maximize thermal dissipation and to minimize voltage drop,
droop and EMI. The following guidelines must be
considered:
1. Please place the input capacitors near the VIN pin as
close as possible.
2. Output decoupling capacitors for load must be placed
near the load as close as possible for decoupling highfrequency ripples.
3. Locate APL3522 and output capacitors near the load to
reduce parasitic resistance and inductance for excellent load transient performance.
4. The negative pins of the input and output capacitors
and the GND pin must be connected to the ground plane
of the load.
5. Keep VIN and VOUT traces as wide and short as possible.
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APL3522A/B
Package Information
SOT-23-5
D
e
E
E1
SEE
VIEW A
b
c
0.25
A
L
0
GAUGE PLANE
SEATING PLANE
A1
A2
e1
VIEW A
S
Y
M
B
O
L
SOT-23-5
INCHES
MILLIMETERS
MIN.
MIN.
MAX.
A
MAX.
1.45
0.057
A1
0.00
0.15
0.000
0.006
A2
0.90
1.30
0.035
0.051
b
0.30
0.50
0.012
0.020
c
0.08
0.22
0.003
0.009
D
2.70
3.10
0.106
0.122
E
2.60
3.00
0.102
0.118
E1
1.40
1.80
0.055
0.071
e
0.95 BSC
0.037 BSC
e1
1.90 BSC
0.075 BSC
L
0.30
0.60
0
0°
8°
0.012
0°
0.024
8°
Note : 1. Follow JEDEC TO-178 AA.
2. Dimension D and E1 do not include mold flash, protrusions or gate
burrs. Mold flash, protrusion or gate burrs shall not exceed 10 mil
per side.
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APL3522A/B
Carrier Tape & Reel Dimensions
P0
P2
P1
A
B0
W
F
E1
OD0
K0
A0
A
OD1 B
B
T
SECTION A-A
SECTION B-B
H
A
d
T1
Application
SOT-23-5
A
H
T1
C
d
D
W
E1
F
178.0±2.00
50 MIN.
8.4+2.00
-0.00
13.0+0.50
-0.20
1.5 MIN.
20.2 MIN.
8.0±0.30
1.75±0.10
3.5±0.05
P0
P1
P2
D0
D1
T
A0
B0
K0
4.0±0.10
4.0±0.10
2.0±0.05
1.5+0.10
-0.00
1.0 MIN.
0.6+0.00
-0.40
3.20±0.20
3.10±0.20
1.50±0.20
(mm)
Devices Per Unit
Package Type
Unit
Quantity
SOT-23-5
Tape & Reel
3000
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APL3522A/B
Taping Direction Information
SOT-23-5
USER DIRECTION OF FEED
Classification Profile
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APL3522A/B
Classification Reflow Profiles
Profile Feature
Sn-Pb Eutectic Assembly
Pb-Free Assembly
100 °C
150 °C
60-120 seconds
150 °C
200 °C
60-120 seconds
3 °C/second max.
3°C/second max.
183 °C
60-150 seconds
217 °C
60-150 seconds
See Classification Temp in table 1
See Classification Temp in table 2
Time (tP)** within 5°C of the specified
classification temperature (Tc)
20** seconds
30** seconds
Average ramp-down rate (Tp to Tsmax)
6 °C/second max.
6 °C/second max.
6 minutes max.
8 minutes max.
Preheat & Soak
Temperature min (Tsmin)
Temperature max (Tsmax)
Time (Tsmin to Tsmax) (ts)
Average ramp-up rate
(Tsmax to TP)
Liquidous temperature (TL)
Time at liquidous (tL)
Peak package body Temperature
(Tp)*
Time 25°C to peak temperature
* Tolerance for peak profile Temperature (Tp) is defined as a supplier minimum and a user maximum.
** Tolerance for time at peak profile temperature (tp) is defined as a supplier minimum and a user maximum.
Table 1. SnPb Eutectic Process – Classification Temperatures (Tc)
Package
Thickness
<2.5 mm
≥2.5 mm
Volume mm
<350
235 °C
220 °C
3
Volume mm
≥350
220 °C
220 °C
3
Table 2. Pb-free Process – Classification Temperatures (Tc)
Package
Thickness
<1.6 mm
1.6 mm – 2.5 mm
≥2.5 mm
Volume mm
<350
260 °C
260 °C
250 °C
3
Volume mm
350-2000
260 °C
250 °C
245 °C
3
Volume mm
>2000
260 °C
245 °C
245 °C
3
Reliability Test Program
Test item
SOLDERABILITY
HOLT
PCT
TCT
HBM
MM
Latch-Up
Method
JESD-22, B102
JESD-22, A108
JESD-22, A102
JESD-22, A104
MIL-STD-883-3015.7
JESD-22, A115
JESD 78
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Description
5 Sec, 245°C
1000 Hrs, Bias @ Tj=125°C
168 Hrs, 100%RH, 2atm, 121°C
500 Cycles, -65°C~150°C
VHBM≧2KV
VMM≧200V
10ms, 1tr≧100mA
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APL3522A/B
Customer Service
Anpec Electronics Corp.
Head Office :
No.6, Dusing 1st Road, SBIP,
Hsin-Chu, Taiwan, R.O.C.
Tel : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
2F, No. 11, Lane 218, Sec 2 Jhongsing Rd.,
Sindian City, Taipei County 23146, Taiwan
Tel : 886-2-2910-3838
Fax : 886-2-2917-3838
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