AOSMD AOZ1321DI

AOZ1321DI
Load Switch with Controlled Slew Rate
General Description
Features
The AOZ1321DI is a P-channel high-side load switch
with controlled slew rate. Three slew rate options are
available. The AOZ1321DI-01L and AOZ1321DI-04L
have slew rates of 800us. The AOZ1321DI-02L and
AOZ1321DI -05L feature fast Slew Rate (less than 1µs).
The slew rate of AOZ1321DI-03L and AOZ1321DI-06L is
100µs. The AOZ1321DI-03L, AOZ1321DI-04L, and
AOZ1321DI-05L provide an output discharge circuit to
quickly discharge the output when the switch is disabled.
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The P-channel MOSFET has typical on resistance of
60mΩ. The very low RDS(ON) significantly reduces the
power path dissipation. The input voltage range of
AOZ1321DI is from 1.6V to 5.5V. The control input is
compatible with both TTL and CMOS logic. Ultra low
quiescent current makes this product suitable for any
portable applications.
The AOZ1321DI is available in 4-pin 1.2x1.6 DFN
package and is rated over the -40°C to +85°C ambient
temperature range.
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●
●
1.6V to 5.5V input voltage range
Low RDS(ON) (60mΩ typical at 5V)
Controlled turn-on slew rate
◗ 800µs (AOZ1321DI-01L, -04L)
◗ 100µs (AOZ1321DI-03L, -06L)
◗ 1µs (AOZ1321DI-02L, -05L)
Output discharge function (-03L, -04L, -05L)
Low quiescent current (1.0µA typical)
Low shutdown current (<1µA)
4kV ESD Rating
Tiny 1.2x1.6 DFN package
Applications
●
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Cellular phones
MP3 players
Personal media players
Notebook computers
Digital still cameras
Hot-swap applications
Typical Application
VIN
VOUT
OUT
IN
C1
AOZ1321DI
EN
OFF ON
C2
1µF/10µF
GND
R1
Rev. 1.1 August 2008
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Page 1 of 15
AOZ1321DI
Ordering Information
Part Number
Slew Rate
Output Discharge
AOZ1321DI-04L
800µs
Yes
AOZ1321DI-01L
800µs
No
AOZ1321DI-05L
1µs
Yes
AOZ1321DI-02L
1µs
No
AOZ1321DI-03L
100µs
Yes
AOZ1321DI-06L
100µs
No
Package
Environmental
1.2 x 1.6 DFN-4
Green Product
• All AOS products are offered in packages with Pb-free plating and compliant to RoHS standards.
• Parts marked as Green Products (with “L” suffix) use reduced levels of Halogens, and are also RoHS compliant.
Please visit www.aosmd.com/web/quality/rohs_compliant.jsp for additional information.
Pin Configuration
VOUT 1
4
EN
3
VIN
Pad is
GND
GND 2
DFN-4 1.2mm x 1.6mm
(Top View)
Pin Description
Pin Name
Pin Number
IN
3
Input. IN is the drain of the P-channel MOSFET. It is the supply input of the IC.
GND
2
Ground.
OUT
1
Output. OUT is the source of the P-channel MOSFET.
EN
4
Enable. The P-channel MOSFET turns on when EN is logic HIGH.
Pin Function
Absolute Maximum Ratings
Recommend Operating Ratings
Exceeding the Absolute Maximum ratings may damage the device.
The device is not guaranteed to operate beyond the Maximum
Operating Ratings.
Parameter
Rating
Input Voltage (VIN)
6V
Enable Voltage (VIN)
6V
Continuous Drain Current (ID)
TA = 25°C
TA = 85°C
Pulsed Drain Current (IDP)
Continuous Diode Current (IS)
Storage Temperature (TS)
±2A
±1.4A
±6A
–50mA
Parameter
Input Voltage (VIN)
Junction Temperature (TJ)
Package Thermal Resistance
1.2 x 1.6 DFN-4 (ΘJA)
1.2 x 1.6 DFN-4 (ΘJC)
Rating
1.6V to 5.5V
-40°C to +125°C
143.17°C/W
128.1°C/W
–55°C to +150°C
ESD Rating(1)
4kV
Note:
1. Devices are inherently ESD sensitive, handling precautions are
required. Human body model is a 100pF capacitor discharging
through a 1.5kΩ resistor.
Rev. 1.1 August 2008
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Page 2 of 15
AOZ1321DI
Electrical Characteristics
TA = 25°C, VIN = VEN = 5V, unless otherwise specified.
Symbol
Parameter
Conditions
VEN_TH
Enable Threshold Voltage
VIN = 1.6V to 4.5V, ID = –250uA
IIN
Quiescent Supply Current
AOZ1321DI -02L/05L
VIN = VEN = 5.5V
Min.
IOFF
RSHUTDOWN
Max.
Units
1.2
V
1
3
µA
1.6
3
0.3
AOZ1321DI -01L/03L/04L/06L
RDS(ON)
Typ.
1
µA
OFF State Leakage Current
VIN = +5.5V, VEN = 0V
Switch On-Resistance
VIN = 5.0V, ID = –100mA, VEN = 1.5V
60
85
VIN = 4.5V, ID = –100mA, VEN = 1.5V
62
90
VIN = 3.6V, ID = –100mA, VEN = 1.5V
65
95
VIN = 2.5V, ID = –100mA, VEN = 1.5V
75
120
VIN = 1.8V, ID = –100mA, VEN = 1.5V
95
180
VIN = 1.7V, ID = –100mA, VEN = 1.5V
101
195
VIN = 1.6V, ID = –100mA, VEN = 1.5V
114
223
VIN = 3.6V, ITEST = 1mA, VEN = 0V
162
220
Ω
1.3
2.5
µs
1.7
4.0
µs
100
200
ns
20
100
ns
1.3
2.5
µs
Turn-Off Resistance
mΩ
AOZ1321DI–05L (TR = 1µs with Output Discharge)
TD(ON)
TR
TD(OFF)
TF
Output Turn-on delay
Output Rise-time
Output Turn-off delay
VIN = 3.6V, ID = –100mA, VEN = 1.5V
0.5
Output Fall-time
AOZ1321DI–02L (TR = 1µs without Output Discharge)
TD(ON)
TR
TD(OFF)
TF
Output Turn-On Delay
Output Rise-time
Output Turn-Off Delay
VIN = 3.6V, ID = –100mA, VEN = 1.5V
0.5
Output Fall-time
1.7
4.0
µs
100
200
ns
20
100
ns
320
700
µs
800
1500
µs
60
200
ns
20
100
ns
320
700
µs
800
1500
µs
60
200
ns
20
100
ns
120
220
µs
100
200
µs
AOZ1321DI–04L (TR = 800µs with Output Discharge)
TD(ON)
TR
TD(OFF)
TF
Output Turn-On Delay
Output Rise Time
Output Turn-Off Delay
VIN = 3.6V, ID = –100mA, VEN = 1.5V
500
Output Fall-time
AOZ1321DI–01L (TR = 800µs without Output Discharge)
TD(ON)
TR
TD(OFF)
TF
Output Turn-On Delay
Output Rise Time
Output Turn-Off Delay
VIN = 3.6V, ID = –100mA, VEN = 1.5V
500
Output Fall-time
AOZ1321DI–03L (TR = 100µs with Output Discharge)
TD(ON)
TR
TD(OFF)
TF
Output Turn-On Delay
Output Rise Time
Output Turn-Off Delay
VIN = 3.6V, ID = –100mA, VEN = 1.5V
50
Output Fall-time
110
200
ns
20
100
ns
120
220
µs
100
200
µs
110
200
ns
20
100
ns
AOZ1321DI–06L (TR = 100µs without Output Discharge)
TD(ON)
TR
TD(OFF)
TF
Output Turn-On Delay
Output Rise Time
Output Turn-Off Delay
VIN = 3.6V, ID = –100mA, VEN = 1.5V
Output Fall-time
Rev. 1.1 August 2008
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50
Page 3 of 15
AOZ1321DI
Typical Operating Characteristics
RDS(ON) Variance with Temperature
EN Threshold Voltage vs. Input Voltage
90
1
Vds = 3.6V, Id = 0.1A
85
EN Threshold Votlage (V)
80
RDS(ON) (MΩ)
VIH, Id = -250uA
VIL, Id = -250uA
0.9
75
70
65
60
0.8
0.7
0.6
0.5
55
50
-40
0.4
-20
0
20
40
60
80
100 120 140 160
1.5
2.5
Temperature (°C)
ON Resistance vs. Input Voltage
4.5
5.5
ON Resistance vs. Input Voltage
500
120
IL = 1.2A
IL = 0.9A
IL = 0.1A
110
450
Vin=1.8V
Vin=2.5V
Vin=4.5V
400
100
350
VDROP) (mV)
RDS(ON) (MΩ)
3.5
Input Voltage (V)
90
80
300
250
200
150
70
100
60
50
50
0
1.5
2.5
3.5
Input Voltage (V)
4.5
5.5
0
0.5
Turn-on Delay vs. Input Voltage
(AOZ1321DI-02L/05L)
1
1.5
2
Load Current (A)
2.5
3
Rise Time vs. Input Voltage
(AOZ1321DI-02L/05L)
12
8
7
10
6
Rise Time (µs)
Turn-On (µs)
8
6
4
5
4
3
2
2
1
0
1.5
2
Rev. 1.1 August 2008
2.5
3
3.5
Input Voltage (V)
4
4.5
5
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0
1.5
2
2.5
3
3.5
Input Voltage (V)
4
4.5
5
Page 4 of 15
AOZ1321DI
Typical Operating Characteristics (Continued)
Turn-off Delay vs. Input Voltage
(AOZ1321DI-02L/05L)
Fall Time vs. Input Voltage
(AOZ1321DI-02L/05L)
200
40
180
35
140
Fall Time (µs)
Turn-Off (µs)
160
120
100
80
30
25
20
15
60
10
40
5
20
0
1.5
2
2.5
3
3.5
Input Voltage (V)
4
4.5
0
1.5
5
2
2.5
3
3.5
Input Voltage (V)
4
4.5
5
4.5
5
4.5
5
Rise Time vs. Input Voltage
(AOZ1321DI-01L/04L)
Turn-on Delay vs. Input Voltage
(AOZ1321DI-01L/04L)
1200
450
400
1000
Rise Time (µs)
Turn-On (µs)
350
300
250
200
800
600
400
150
100
200
50
0
1.5
0
2
2.5
3
3.5
Input Voltage (V)
4
4.5
5
1.5
2
Turn-off Delay vs. Input Voltage
(AOZ1321DI-01L/04L)
3
3.5
Input Voltage (V)
4
Fall Time vs. Input Voltage
(AOZ1321DI-01L/04L)
180
45
160
40
140
35
120
Fall Time (µs)
Turn-Off (µs)
2.5
100
80
30
25
20
60
15
40
10
20
5
0
0
1.5
2
Rev. 1.1 August 2008
2.5
3
3.5
Input Voltage (V)
4
4.5
5
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1.5
2
2.5
3
3.5
Input Voltage (V)
4
Page 5 of 15
AOZ1321DI
Typical Operating Characteristics (Continued)
Turn-on Delay vs. Input Voltage
(AOZ1321DI-03L/06L)
Rise Time vs. Input Voltage
(AOZ1321DI-03L/06L)
350
120
300
100
Rise Time (µs)
Turn-on (µs)
250
200
150
80
60
40
100
20
50
0
0
1.5
2
2.5
3
3.5
Input Voltage (V)
4
4.5
5
1.5
2
2.5
3
3.5
Input Voltage (V)
4
4.5
5
4.5
5
Fall Time vs. Input Voltage
(AOZ1321DI-03L/06L)
Turn-off Delay vs. Input Voltage
(AOZ1321DI-03L/06L)
300
50
45
40
35
200
Fall Time (µs)
Turn-off (µs)
250
150
100
30
25
20
15
10
50
5
0
1.5
0
2
Rev. 1.1 August 2008
2.5
3
3.5
Input Voltage (V)
4
4.5
5
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1.5
2
2.5
3
3.5
4
Input Voltage (V)
Page 6 of 15
AOZ1321DI
Functional Characteristics
AOZ1321DI-02L, AOZ1321DI-05L
Turn-On Timing
Turn-Off Timing
ENABLE
2V/div
ENABLE
2V/div
VOUT
2V/div
VOUT
2V/div
IOUT
500mA/div
IOUT
100mA/div
Time: 4µs/div
Time: 40µs/div
Turn-On Timing
Turn-Off Timing
ENABLE
2V/div
ENABLE
2V/div
VOUT
2V/div
VOUT
2V/div
IOUT
2A/div
IOUT
100mA/div
Time: 400µs/div
Time: 10µs/div
Rev. 1.1 August 2008
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Page 7 of 15
AOZ1321DI
Functional Characteristics (Continued)
AOZ1321DI-01L, AOZ1321DI-04L
Turn-On/Turn-Off Timing
ENABLE
2V/div
Turn-Off Timing
ENABLE
2V/div
VOUT
2V/div
VOUT
2V/div
IOUT
100mA/div
IOUT
100mA/div
Time: 1ms/div
Time: 40µs/div
Turn-On/Turn-Off Timing
Turn-Off Timing
ENABLE
2V/div
ENABLE
2V/div
VOUT
2V/div
VOUT
2V/div
IOUT
100mA/div
IOUT
100mA/div
Time: 400µs/div
Time: 1ms/div
Rev. 1.1 August 2008
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Page 8 of 15
AOZ1321DI
Functional Characteristics (Continued)
AOZ1321DI-03L, AOZ1321DI-06L
Turn-On/Turn-Off Timing
ENABLE
2V/div
Turn-Off Timing
ENABLE
2V/div
VOUT
2V/div
VOUT
2V/div
IOUT
100mA/div
IOUT
100mA/div
Time: 1ms/div
Time: 40µs/div
Turn-On/Turn-Off Timing
ENABLE
2V/div
Turn-Off Timing
ENABLE
2V/div
VOUT
2V/div
VOUT
2V/div
IOUT
100mA/div
IOUT
100mA/div
Time: 1ms/div
Rev. 1.1 August 2008
Time: 400µs/div
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Page 9 of 15
AOZ1321DI
Timing Diagram
VIH
EN
VIL
90%
90%
10%
OUT
TD(ON)
TD(OFF)
TR
Figure 1. AOZ1321 Timing Diagram
Functional Block Diagram
IN
OUT
Gate Driver &
Slew Rate
Control
160Ω
AOZ1321DI
EN
GND
Figure 2. Functional Block Diagram
Rev. 1.1 August 2008
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Page 10 of 15
AOZ1321DI
Detailed Description
Internal Discharge Resistor
The AOZ1321DI has an internal 160Ω resistor to
discharge any remaining voltage from the system to
the ground that is store in a capacitive load. This provides
a safe shutdown of the system to prevent any damages
to the devices. This function is controlled from the
Enable pin.
Slew Rate Control
The AOZ1321DI is a family of P-channel high-side load
switches with controlled slew rate. The device is enabled
when the EN pin is high. Once enabled, the gate driver
and slew-rate control circuitry immediately raises the
source-to-gate voltage of the P-channel MOSFET to its
threshold level, and then gradually turns on the MOSFET
by linearly increasing the source-to-gate voltage. This
slow turn-on action effectively limits the input inrush
current and provides a nice ramp for the output voltage.
After the MOSFET is fully enhanced, the AOZ1321DI
quickly increases the source-to-gate voltage to the full
input voltage to minimize on resistance and reduce
power dissipation.
Three slew-rate options are available. AOZ1321DI-01L
and AOZ1321DI-04L have slew rate of 800us. This
option significantly reduces the inrush current when the
MOSFET turns on, allowing the use of very small input
capacitor. AOZ1321DI-02L and -05L have no slew rate
control and the MOSFET can be turned on within 1us.
This option is suitable for applications that require very
fast switching. AOZ1321DI-03L and -06L have moderate
slew rate to 100µs. The AOZ1321DI-03L, -04L and -05L
options include an internal output discharge circuit that
quickly discharges the output to ground when the device
is disabled.
On/Off Control
The AOZ1321DI is enabled when the EN pin is asserted
high. The device is disabled when the EN pin is asserted
low. The EN input is compatible with both TTL and CMOS
logic.
Applications Information
Input Capacitor Selection
Use a 1µF or larger capacitor for input bypassing.
Place the capacitor close to the IN pins of AOZ1321DI.
Rev. 1.1 August 2008
Output Capacitor Selection
Use a 0.1µF or larger capacitor between OUT and GND.
The capacitance does not affect the turn-on slew rate.
However, a larger capacitor makes the initial turn-on
transient smoother.
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Page 11 of 15
AOZ1321DI
Layout Guidelines
Good PCB is important for improving the thermal performance of AOZ1321DI. Place the input and output bypass
capacitors close to the IN and OUT pins. The input and
output PCB traces should be as wide as possible for the
given PCB space. Use a ground plane to enhance the
power dissipation capability of the device. The
AOZ1321DI evaluation board can be used as a layout
example. The PCB layout of AOZ1321DI evaluation
board is shown in Figure 3.
Figure 3. AOZ1321DI PCB Layout
Rev. 1.1 August 2008
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Page 12 of 15
AOZ1321DI
Pin 1 Dot
E
Seating
Plane
Package Dimensions, DFN 1.2 x 1.6 4L
Pin #1 ID
R0.100
E1
A3
b
D
D1
e
A1
Exposed
Pad
TOP VIEW
A
BOTTOM VIEW
SIDE VIEW
Dimensions in millimeters
RECOMMENDED LAND PATTERN
1.30
0.65
0.86
0.275
0.30
0.55
0.40
0.50
UNIT: mm
Nom. Max.
0.55
0.60
—
0.05
0.152 REF.
0.20
0.25
0.30
1.55
1.60
1.65
0.45
0.50
0.55
1.15
1.20
1.25
Dimensions in inches
Symbols
A
A1
A3
b
E
E1
D
Min.
0.50
0
Symbols
A
A1
A3
b
E
E1
D
D1
e
L
0.81
D1
e
L
0.032
aaa
bbb
—
—
0.15
0.10
—
—
aaa
bbb
—
—
0.006
0.004
—
—
ccc
—
0.10
—
ccc
—
0.004
—
0.86
0.91
0.5 BSC
0.30
0.35
0.40
Min.
Nom. Max.
0.020 0.022 0.024
0
—
0.002
0.006 REF.
0.008 0.010 0.012
0.061 0.063 0.065
0.018 0.020 0.022
0.045 0.047 0.049
0.034 0.036
0.020 BSC
0.012 0.014 0.016
Notes:
1. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact.
2. Coplanarity ccc applies to the terminals and all other bottom surface metallization.
Rev. 1.1 August 2008
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Page 13 of 15
AOZ1321DI
Tape and Reel Dimensions, DFN 1.2 x 1.6 4L
Carrier Tape
P1
P2
D0
D1
E1
K0
B0
E2
5°
P0
T
E3
5°
A0
E
B–B' Section
Feeding Direction
A–A' Section
UNIT: mm
Package
T
DFN 1.2x1.6 0.254
±0.02
B0
1.78
±0.05
Reel
65°
A0
1.38
±0.05
K0
0.78
±0.05
D0
D1
E
ø1.5 ø0.6
8.00
±0.10 ±0.05 +0.30/-0.10
45°
E1
1.75
±0.10
E2
3.50
±0.05
P0
4.00
±0.10
P1
4.00
±0.10
P2
2.00
±0.05
W1
S
K
N
M
E
Section: B–B'
Section: A–A'
H
Arbor Hole Detail A
Scale 2:1
Front View
UNIT: mm
Tape Size Reel Size
8mm
ø149
M
N
W
W1
H
S
K
E
ø179.0
±0.50
ø55.0
±0.5
8.4
+1.5/-0.0
14.4
Max.
ø13.0
+0.5/-0.2
1.5
Min.
10.1
Min.
2.70
±0.2
Leader / Trailer & Orientation
Trailer Tape
300mm Min.
Rev. 1.1 August 2008
Components Tape
Orientation in Pocket
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Leader Tape
500mm Min.
Page 14 of 15
AOZ1321DI
Package Marking
DFN 1.2 x 1.6
$P $W $L
Part Number Code
Underline Denotes Green Product
Lot Number
Week
Alpha & Omega Semiconductor reserves the right to make changes at any time without notice.
LIFE SUPPORT POLICY
ALPHA & OMEGA SEMICONDUCTOR PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL
COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS.
As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant into
the body or (b) support or sustain life, and (c) whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of
the user.
Rev. 1.1 August 2008
2. A critical component in any component of a life
support, device, or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
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Page 15 of 15