AP1201
Single-Channel Power Distribution Switch
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 0.4 Feb 10, 2004
1/9
Features
- 100mΩ typical on-resistance
- 2.7V to 5.5V input voltage
- Adjustable current-limit 0.7A to 1.25A
(AP1201A/C)
- Fixed current-limit (1.25A) for AP1201B
- Fault flag with internal delay circuit
- 1μA typical off-state supply current
- 65μA typical on-state supply current
- Output can be forced higher than input (off-state)
- Thermal shutdown
- 2.4V typical under voltage lockout (UVLO)
- Slow turn-on (soft-start) and fast turn-off
- Enable Active-High or active-Low
- SOT23-5L, SOT23-6L and SOT89-5L packages
Applications
- USB Power Switch
- Battery-charger circuits
- Hot plug-in power supplies
General Description
The AP1201 series are integrated high-side power
switch with enable, flag functions and adjustable
current-limit 0.7A to 1.25A, optimized for
self-powered and bus-powered Universal Serial
Bus (USB) applications. The AP1201 series support
the following USB requirements: each switch
channel supplies up to 700mA as required by USB
downstream devices; the switch’s low on-resistance
meets USB voltage drop requirements; fault current
is limited to typically 900mA~1.25A; and a flag
output is available to indicate fault conditions to the
local USB controller. Soft start eliminates the
momentary voltage drop on the upstream port that
may occur when the switch is enabled in
bus-powered applications.
Additional features include thermal shutdown to
prevent catastrophic switch failure from high-current
loads, under voltage lockout (UVLO) to ensure that
the device remains off unless there is a valid input
voltage present, and 3.3V and 5V logic compatible
enable inputs.
Pin Assignments
1
2
3 7
4
6
5
EN
SET
FLG
GND
OUT IN
SOT23-6L
AP1201C
1
2
3 7
4
5
EN SET
GND
OUT IN
SOT23-5L
AP1201A
1
2
3 7
4
5
EN FLG
GND
OUT IN
SOT23-5L
AP1201B
1
2
3 7
4
5
ENSET
GND
OUT
IN
SOT89-5L
AP1201A GND
1
2
3 7
4
5
EN
FLG
GND
OUTIN
SOT89-5L
AP1201B GND
Pin Descriptions
Name Descriptions
EN
Enable: Logic-compatible Enable input.
(H: active high, L: active low). Do not
float.
FLG
Fault Flag: Active-low, open-drain
output. Indicates over current, UVLO,
and thermal shutdown.
GND Ground: Supply return.
IN
Supply Input: Output MOSFET drain.
Also supplies IC’s internal circuitry.
Connect to
p
ositive su
pp
l
y
.
OUT
Switch Output: Output MOSFET
source. Typically connect to switched
side of load.
SET
Current limit set input. A resistor pull
high to set current-limit value (A, C
type only).
AP1201
Single-Channel Power Distribution Switch
Anachip Corp.
www.anachip.com.tw Rev.0.4 Feb 10, 2004
2/9
Ordering Information
Power Switch Enable
W5 : SOT23-5
W6 : SOT23-6
Y : SOT89-5L
Packing
Blank: Tube
A : Taping
Package
L: Active-Low
H: Active-High
Current & FLG
A: Adj I ,w/o FLG
B: 1.5A fix,w FLG
C:Adj I,w FLG
AP1201 X X X X X
Lead Free
Blank : Normal
L : Lead Free Package
Block Diagram
OUT
IN
FLG
EN
Power N-MOSFET
Charge
Pump
Thermal
Shutdown
Driver
Current
Limit
UVLO
CS
SET
Absolute Maximum Ratings (Note 1)
Symbol Parameter Rating Unit
VIN Supply Voltage +7 V
VFLG Fault Flag Voltage +7 V
IMAX Maximum Continuous Current 1.5 A
VOUT Output Voltage +7 V
VEN Control Input –0.3 to +15 V
TS Storage Temperature -65 to +150 oC
TLEAD Lead Temperature 260 oC
VESD ESD (HBM) Rating, (Note 2) 4 KV
AP1201
Single-Channel Power Distribution Switch
Anachip Corp.
www.anachip.com.tw Rev.0.4 Jan 28, 2004
3/9
Operating Ratings (Note 3)
Symbol Parameter Rating Unit
VIN Supply Voltage +2.7 to +5.5 V
TA Ambient Operating Temperature -40 to +85 oC
PD SOT89-5, SOT23-5, SOT23-6 Internal Limited
ΘJC SOT89-5 100
oC/W
ΘJC SOT23-5, SOT23-6 300 oC/W
Electrical Characteristics (Under Operating Conditions) Vin=+5V;TA=25oC; unless noted.
Symbol Parameter Conditions Min. Typ. Max. Unit
Switch off, OUT = open
(Note 4) 0.1 1 µA
ICC Supply Current Switch on, OUT = open
(Note 4) 65 110 µA
low-to-high transition(Note
4) 1.7 2.4 V
VIT Enable Input Threshold high-to-low transition(Note
4) 0.8 1.4 V
IEN Enable Input Current VEN =0V to 5.5V -1 ±0.01 1 µA
CEN Enable Input Capacitance 1 pF
RDS(ON) Switch Resistance VIN =5V, IOUT =500mA 100 120 mΩ
TOND Output Turn-On Delay RL =10Ω 30 µs
Tr Output Turn-On Rise
Time RL =10Ω 0.75 ms
TOFFD Output Turnoff Delay RL =10Ω 1 20 µs
Tf Output Turnoff Fall Time RL =10Ω 0.15 µs
ILEAK Output Leakage Current 10 µA
Current-Limit RLOAD=1Ω AP1201B 1.0 1.25 1.8 A
Short-circuit Current AP1201B -- 1.25 -- A
ILIM Adj Current Limit Typical
Value AP1201A/C 0.7 -- 1.25 A
TJ increasing 140
oC
TTS Over-temperature
Shutdown Threshold TJ decreasing 130
oC
VIN = 5V, IL = 10mA 10 25 Ω
RFO Error Flag Output
Resistance VIN = 3.3V, IL = 10mA 15 40 Ω
tD FLG Output Delay Time 1 2 5 ms
IFOH Error Flag Off Current VFLAG = 5V 0.01 1 µA
VIN = increasing 2.5 V
UVLO UVLO Threshold VIN = decreasing 2.3 V
Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 3. The device is not guaranteed to function outside its operating rating.
Note 4. Off is VEN≦0.8Vand on is VEN≧2.4V for the AP1201X-H. Off is VEN≧2.4V and on is VEN≦0.8V for the AP1201X-L. The enable
input has approximately 200mV of hysteresis. See control threshold charts.
AP1201
Single-Channel Power Distribution Switch
Anachip Corp.
www.anachip.com.tw Rev.0.4 Feb 10, 2004
4/9
Typical Application Circuit
Power Supply
Downstream
USB Ports
USB
Control
3.3V 5V
0.1uF
IN
FLG
EN
OUT
GND
0.1uF 33uF GND
VBUS
D-
D+
AP1201C
SET
Test Circuit
GND
FLG
IN
SET
EN
AP1201
OUT
C1
0.1uF
V
CC
=+5V
ON
OFF
R1
10K
AP1201
Single-Channel Power Distribution Switch
Anachip Corp.
www.anachip.com.tw Rev.0.4 Jan 28, 2004
5/9
Function Description
Error Flag
An open-drained output of an N-channel MOSFET,
the FLG output is pulled low to signal the following
fault conditions: input under-voltage, output current
limit, and thermal shutdown.
Current Limit
The current limit is set externally. It protects the
output MOSFET switches from damage due to
undesirable short circuit conditions or excess inrush
current often encountered during hot plug-in. The
low limit of the current limit threshold of the AP1201
allows a minimum current of 0.9A through the
MOSFET switches. A current limit condition will
signal the error flag. A resistor from SET to VIN
sets the current-Limit value.
ILIM(MAX) ~ 1.4X ILIM(TYP)
ILIM(MIN) ~ 0.8X ILIM(TYP)
AP1201 Rset
Current Limit Threshold (A)
Typical value
RSET (Ω)
(Vout = 5V) (Vout = 3.3V)
10K 0.71 0.69
20K 0.92 0.90
30K 1.01 1.00
40K 1.05 1.02
60K 1.10 1.08
80K 1.15 1.11
100K 1.19 1.16
200K 1.22 1.20
floating 1.25 1.23
Thermal Shutdown
When the chip temperature exceeds 140ºC for any
reason, the thermal shutdown function enables and
turns off MOSFET’s switch and signals the error
flag. A hysteresis of 10ºC prevents the MOSFETs
from turning back on until the chip temperature
drops to below 130ºC.
Supply Filtering
A 0.1µF to 1µF bypass capacitor from IN to GND,
located near the device, is strongly recommended
to control supply transients. Without a bypass
capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance)
to damage internal control circuitry.
Transient Droop Requirements
USB supports dynamic attachment (hot plug-in) of
peripherals. A current surge is caused by the input
capacitance of downstream device. Ferrite beads
are recommended in series with all power and
ground connector pins. Ferrite beads reduce EMI
and limit the inrush current during hot-attachment
by filtering high-frequency signals.
Short Circuit Transient
Bulk capacitance provides the short-term transient
current needed during a hot-attachment event. With
a 33µF, 16V tantalum or 100µF, 10V electrolytic
capacitor mounted close to downstream connector
per port should provide transient drop protection.
Printed Circuit Layout
The power circuitry of USB printed circuit boards
requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
AP1201
Single-Channel Power Distribution Switch
Anachip Corp.
www.anachip.com.tw Rev.0.4 Feb 10, 2004
6/9
Marking Information
SOT23-5L
XX Y M X
7
123
45
XX
: Identification code
(See Appendix)
Y
: Year: 0-9
M
: Month: A~L
X
: Blank : normal
L : Lead Free Package
SOT23-6L
7
123
456
XX Y M X
SOT89-5L
1
2
3
5
7
4
XX
YM X
Appendix
Part Number Package Identification Code
AP1201AL SOT23-5/SOT89-5 FL
AP1201CL SOT23-6 FL
AP1201AH SOT23-5/SOT89-5 FH
AP1201CH SOT23-6 FH
AP1201BL SOT23-5/SOT89-5 F1
AP1201BH SOT23-5/SOT89-5 F2
AP1201
Single-Channel Power Distribution Switch
Anachip Corp.
www.anachip.com.tw Rev.0.4 Feb 10, 2004
7/9
Package Information
(1) Package Type: SOT23-5L
θ
Gauge Plane
0.25 mm
L
L1
E1 E
e1
D
123
4
5
b
e
b1
b
CC1
Base
Metal
With
Plating
A2
A1
A
Seating Plane
0.10 C
5x
2(4x)
θ
1(4x)
θ
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 1.05 1.20 1.35 0.041 0.047 0.053
A1 0.05 0.10 0.15 0.002 0.004 0.006
A2 1.00 1.10 1.20 0.039 0.043 0.047
b 0.25 - 0.55 0.010 - 0.022
b1 0.25 0.40 0.45 0.010 0.016 0.018
c 0.08 - 0.20 0.003 - 0.008
c1 0.08 0.11 0.15 0.003 0.004 0.006
D 2.70 2.85 3.00 0.106 0.112 0.118
E 2.60 2.80 3.00 0.102 0.110 0.118
E1 1.50 1.60 1.70 0.059 0.063 0.067
L 0.35 0.45 0.55 0.014 0.018 0.022
L1 0.60 Ref. 0.024 Ref.
e 0.95 Bsc. 0.037 Bsc.
e1 1.90 Bsc. 0.075 Bsc.
θ 0o 5
o 10o 0
o 5
o 10o
θ1 3o 5
o 7
o 3
o 5
o 7
o
θ2 6o 8
o 10o 6
o 8
o 10o
AP1201
Single-Channel Power Distribution Switch
Anachip Corp.
www.anachip.com.tw Rev.0.4 Feb 10, 2004
8/9
Package Information (Continued)
(2) Package Type: SOT23-6L
CB
G
A
H (Ref.)
E
0.20
J (Ref.)
I (Ref.)
K (Ref.)
F
D (Typ.)
LL
13
4
65
2
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 2.70 2.90 3.10 0.106 0.114 0.122
B 2.60 2.80 3.00 0.102 0.110 0.118
C 1.40 1.60 1.80 0.055 0.063 0.071
D 0.30 0.43 0.55 0.012 0.017 0.022
E 0 0.05 0.10 0.000 0.002 0.004
F 0o - 10o 0
o - 10o
G 1.90 Ref. 0.075 Ref.
H 1.20 Ref. 0.047 Ref.
I 0.12 Ref. 0.005 Ref.
J 0.37 Ref. 0.015 Ref.
K 0.60 Ref. 0.024 Ref.
L 0.95 Ref. 0.037 Ref.
AP1201
Single-Channel Power Distribution Switch
Anachip Corp.
www.anachip.com.tw Rev.0.4 Feb 10, 2004
9/9
(3) Package Type: SOT89-5L
D
C
A
I
H
G
EB
K
J
L
F
F
Dimensions In Millimeters Dimensions In Inches
Symbol Min. Nom. Max. Min. Nom. Max.
A 4.40 4.50 4.60 0.173 0.177 0.181
B 4.05 4.15 4.25 0.159 0.163 0.167
C 1.50 1.60 1.70 0.059 0.063 0.067
D 1.30 1.40 1.50 0.051 0.055 0.059
E 2.40 2.50 2.60 0.094 0.098 0.102
F 0.80 - - 0.031 - -
G 3.00 Ref. 0.118 Ref.
H 1.50 Ref. 0.059 Ref.
I 0.40 0.46 0.52 0.016 0.018 0.020
J 1.40 1.50 1.60 0.055 0.059 0.063
K 0.35 0.39 0.43 0.014 0.015 0.017
L 5o Typ. 5o Typ.
