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AOZ1320
Load Switch with Controlled Slew Rate
General Description
The AOZ1320 is a P-channel high-side load switch with controlled slew rate. Three slew rate options are available. The AOZ1320-01 and AOZ1320-04 have a slew rate of 1ms, and the AOZ1320-07 has a slew rate of 4.5ms. The AOZ1320-02 and AOZ1320-05 feature fast Slew Rate (less than 500ns). The slew rate of AOZ1320-03 and AOZ1320-06 is 100s. The AOZ1320-03, AOZ1320-04, AOZ1320-05, and AOZ1320-07 provide an output discharge circuit to quickly discharge the output when the switch is disabled. The P-channel MOSFET has typical on resistance of 75m. The very low RDS(ON) significantly reduces the power path dissipation. The input voltage range of AOZ1320 is from 1.8V 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 AOZ1320 is available in a 6-pin SOT23 or 8-pin 2mm X 2mm DFN package and is rated over the -40C to +85C ambient temperature range.
Features

1.8V to 5.5V Input Voltage Range Input Under-Voltage Lockout Low RDS(ON) (75m Typical at 5V) Controlled Turn-On Slew Rate - 1ms (AOZ1320-01, -04) - 0.5s (AOZ1320-02, -05) - 100s (AOZ1320-03, -06) - 4.5ms (AOZ1320-07) Output Discharge Function (-03, -04, -05) Low Quiescent Current (1.2A typical) Low Shutdown Current (<1A) 4.5kV ESD Rating Tiny SOT23 or 2mm x 2mm DFN Package

Applications

Cellular Phones MP3 Players Personal Media Players Notebook Computers Digital Still Cameras Hot-Swap Applications
Typical Application
VIN IN
C2 1F
VOUT OUT
AOZ1320
EN GND
C1 0.1F
OFF ON
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AOZ1320
Ordering Information
Part Number
AOZ1320CI-01* AOZ1320CI-02 AOZ1320CI-03* AOZ1320CI-04 AOZ1320CI-05 AOZ1320CI-06* AOZ1320CI-07 AOZ1320DI-01 AOZ1320DI-02 AOZ1320DI-03 AOZ1320DI-04 AOZ1320DI-05 AOZ1320DI-06
Slew Rate
1ms 0.5s 100s 1ms 0.5s 100s 4.5ms 1ms 0.5s 100s 1ms 0.5s 100s
Output Discharge
No No Yes Yes Yes No Yes No No Yes Yes Yes No
Package
SOT23-6 SOT23-6 SOT23-6 SOT23-6 SOT23-6 SOT23-6 SOT23-6 2x2 DFN-8 2x2 DFN-8 2x2 DFN-8 2x2 DFN-8 2x2 DFN-8 2x2 DFN-8
Environmental
RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant
* Contact manufacturer for availability.
* 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
OUT GND EN
1 6
IN GND NC NC OUT EN GND
1 2 3 4 8 7 6 5
2
5
3
4
IN IN IN NC
SOT23-6
(Top View)
2mm x 2mm DFN-8
(Top View)
Pin Description
Pin Number Pin Name
IN GND OUT EN NC
DFN-8
6, 7, 8 4 2 3 1, 5
SOT23-6
6 2, 5 1 3 4 Ground.
Pin Function
Input. IN is the drain of the P-channel MOSFET. It is the supply input of the IC. Output. OUT is the source of the P-channel MOSFET. Enable. The P-channel MOSFET turns on when EN is logic HIGH. No Connect. This pin is not internally connected.
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AOZ1320
Absolute Maximum Ratings
Exceeding the Absolute Maximum ratings may damage the device.
Recommend Operating Ratings
Rating
-0.3V to 6V -0.3V to 6V -0.3V to VIN + 0.3V 1.6A 2.3A 6A 3A -65C to +150C 4.5kV The device is not guaranteed to operate beyond the Maximum Operating Ratings.
Parameter
IN to GND EN to GND OUT to GND Maximum Continuous Switch Current SOT23-6 2x2 DFN-8 Maximum Pulsed Current (VIN > 2.5V) Maximum Pulsed Current (VIN < 2.5V) Storage Temperature (TS) ESD Rating(1)
Parameter
Operating Junction Temperature (TJ) Power Dissipation SOT23-6 2x2 DFN-8 Package Thermal Resistance SOT23-6 (JA) 2x2 DFN-8 (JA)
Rating
-40C to +150C 0.65W 1.54W 191C/W 81C/W
Note: 1. Devices are inherently ESD sensitive, handling precautions are required. Human body model is a 100pF capacitor discharging through a 1.5k resistor.
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AOZ1320
Electrical Characteristics
Symbol
VIN VUVLO IIN IOUT(OFF) RDS(ON)
TA = 25C, VIN = VEN = 5V, unless otherwise specified. Specifications in BOLD indicate an ambient temperature range of -40C to +85C.
Parameter
Operating Voltage Range Under-Voltage Lockout Threshold Input Quiescent Current Switch Leakage Current Switch On-Resistance
Conditions
VIN Falling VIN Rising EN = 5.0V EN = GND VEN < VIL(max), VOUT = 0V VIN = 5.0V VIN = 4.2V VIN = 3.0V VIN = 1.8V VIN = 1.8V to 2.0V VIN = 2.0V to 4.2V VIN = 4.2V to 5.5V VEN = 5.5V RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 RL = 10, See Figure 1 VEN < VIL(max)
Min.
1.8 0.7 1.0
Typ.
5 0.9 1.2 1.2
Max.
5.5 1.3 1.6 4 1 1 100 105 110 150 0.8
Units
V V A A m
75 78 81 109 1.8 2.0 2.4
VIL VIH
Enable Input-Low Voltage Enable Input-High Voltage
V V
IEN TD(ON) TR TD(OFF) TD(ON) TR TD(OFF) TD(ON) TR TD(OFF) AOZ1320-07 TD(ON) TR TD(OFF) RDIS
Enable Input Leakage Current Output Turn-on delay Output Rise-time Output Turn-off delay Output Turn-On Delay Output Rise-Time Output Turn-Off Delay Output Turn-On Delay Output Rise Time Output Turn-Off Delay Output Turn-On Delay Output Rise Time Output Turn-Off Delay Output Pull-Down Resistance in Shutdown
1 200 1000 20 2 0.5 20 20 100 20 450 4500 20 180 300 1500 30 4 1 30 130 150 30 850 7500 30 250
A s s s s s s s s s s s s
AOZ1320-01, -04
AOZ1320-02, -05
AOZ1320-03, -06
AOZ1320-03, -04, -05, -07
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AOZ1320
Typical Performance Characteristics
Quiescent Current vs. Temperature
2.00 Quiescent Current (A) 1.60
VIN = 5V
Quiescent Current vs. Input Voltage
1.6 Quiescent Current (A) 1.4 1.2 1.0 0.8 0.6 0.4 0.2
1.20 0.80 0.40 0.00 -40
VIN = 3V
0 -20 0 20 40 60 80 100 0 1 2 3 4 5 6 Temperature (C) Input Voltage (V)
RDS(ON) vs. Input Voltage
180 160 RDS(ON) (m) 140 120 100 80 60 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
1.6A
RDS(ON) vs. Temperature
110 100 RDS(ON) (m)
1A 500mA
90
VIN = 3V
80 70 60 50 -40 -20 0 20
VIN = 5V
100mA
40
60
80
100
Input Voltage (V)
Temperature (C)
ON/OFF Threshold vs. Input Voltage
2.00 ON/OFF Threshold (V) 1.80 IOFF-SW (A) 1.60 1.40
VIH
OFF-Switch Current vs. Temperature
0.30 0.25 0.20 0.15 0.10 0.05 0 -40
1.20 1.00 0.80 0.60 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIL
-20
0
20
40
60
80
100
Input Voltage (V)
Temperature (C)
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AOZ1320
Typical Characteristics
AOZ1320-01, AOZ1320-04 Turn-On (VIN = 3V, R = 6) Turn-On (VIN = 5V, R = 10)
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
Turn-Off (VIN = 3V, R = 6)
Turn-Off (VIN = 5V, R = 10)
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
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AOZ1320
Typical Characteristics (Continued)
AOZ1320-02, AOZ1320-05 Turn-On (VIN = 3V, R = 6) Turn-On (VIN = 5V, R = 10)
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
Turn-Off (VIN = 3V, R = 6)
Turn-Off (VIN = 5V, R = 10)
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
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AOZ1320
Typical Characteristics (Continued)
AOZ1320-03, AOZ1320-06 Turn-On (VIN = 3V, R = 6) Turn-On (VIN = 5V, R = 10)
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
Turn-Off (VIN = 3V, R = 6)
Turn-Off (VIN = 5V, R = 10)
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 50S/div
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AOZ1320
Typical Characteristics (Continued)
AOZ1320-07
Turn-On (VIN = 3V, R = 6) Turn-On (VIN = 5V, R = 10)
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 4mS/div
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 4mS/div
Turn-Off (VIN = 3V, R = 6)
Turn-Off (VIN = 5V, R = 10)
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 4ms/div
CH1: On/Off (5V/div) CH3: IIN (200mA/div)
CH2: VOUT (2V/div) Time: 4mS/div
AOZ1320-03, AOZ1320-04, AOZ1320-05, AOZ1320-07
Turn-Off Output Discharge (VIN = VEN = 5V, VOUT = 5V, COUT = 4.7F, TA = 25C)
CH1: VEN (2V/div) Time: 400s/div
CH2: VOUT (2V/div)
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AOZ1320
Timing Diagram
VIH
EN
90%
VIL 90%
OUT TD(ON)
10%
TD(OFF) TR
Figure 1. AOZ1320 Timing Diagram
Functional Block Diagram
IN
OUT
UVLO Comparator
+
Gate Driver & Slew Rate Control
180
0.9V EN
-
AOZ1320 -3, -4, -5
GND
Figure 2. Functional Block Diagram
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AOZ1320
Detailed Description
Slew Rate Control The AOZ1320 is a family of P-channel high-side load switches with controlled slew rate. The device is enabled when the input voltage is above the Under-Voltage Lockout (UVLO) threshold and 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 increases 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 AOZ1320 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. AOZ1320-01 and -04 have a slew rate of 1ms, and the AOZ1320-07 has a slew rate of 4.5ms. This option significantly reduces the inrush current when the MOSFET turns on, allowing the use of very small input capacitor. AOZ1320-02 and -05 have no slew rate control and the MOSFET can be turned on within 500ns. This option is suitable for applications that require very fast switching. AOZ1320-03 and -06 have a moderate slew rate to 100s. The AOZ1320-03, -04, -05, and -07 options include an internal output discharge circuit that quickly discharges the output to ground when the device is disabled. Input Under-Voltage Lockout The operating voltage range of AOZ1320 is from 1.8V to 5.5V. An internal UVLO comparator monitors the input voltage. The device is disabled if the input voltage falls below the UVLO threshold (0.9V typical). The UVLO comparator has about 300mV hysteresis. On/Off Control The AOZ1320 is enabled when the input voltage is above the UVLO threshold and the EN pin is asserted high. The device is disabled when the input voltage is below the UVLO threshold or the EN pin is asserted low. The EN input is compatible with both TTL and CMOS logic. Internal Discharge Resistor The AOZ1320 has an internal 180 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.
Applications Information
Input Capacitor Selection Use a 1F or larger capacitor for input bypassing. Place the capacitor close to the IN pins of AOZ1320. Output Capacitor Selection Use a 0.1F 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. Thermal Considerations To ensure proper operation, the maximum junction temperature (TJ(MAX)) of AOZ1320 should not exceed 150C. Several factors attribute to the junction temperature rise: load current, MOSFET on resistance (RDS(ON)), onresistance temperature coefficient (TC), junction-to-ambient thermal resistance (JA), and ambient temperature (TA). Use the following equation to determine the maximum continuous load current ILOAD(MAX):
I LOAD ( MAX ) = T J ( MAX ) - T A ------------------------------------------------------------------------------------------------------------------ JA * R DS ( ON ) * [ 1 + T C * ( T J ( MAX ) - T A ) ]
Rev. 1.6 August 2008
where RDS(ON) is the maximum value of the MOSFET on resistance at 25C. Please note the maximum load current should not exceed the absolute maximum current rating of the switch. For the SOT-23 package, the absolute maximum current rating is 1.6A. For the 2x2 DFN package, the absolute maximum current rating is 2.3A. For example, when VIN = 5V, the maximum continuous load current of SOT-23 package at room temperature is:
I LOAD ( MAX ) = 150C - 25C --------------------------------------------------------------------------------------------------------------------------------------------- = 2.78A 120C W * 100m * [ 1 + 0.0028 * ( 150C - 25C ) ]
Since the calculated current is greater than the absolute maximum current rating, the maximum load current at VIN = 5V and room temperature is 1.6A. Exceeding the maximum continuous load current may cause damage to the device. Figure 3 and Figure 4 show the maximum load current as a function of the ambient temperature for SOT23 and 2x2 DFN packages respectively. To ensure proper operation, the load current should not exceed the limits in these two figures.
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AOZ1320
Maximum Load Current (IO)
Maximum Load Current (IO)
2.5 2.0 1.5
VIN = 3V VIN = 5V
2.5 2.0
VIN = 3V
VIN = 5V
1.5 1.0 0.5 0 0 20 40 60 80 100
1.0 0.5 0 0 20 40 60 80 100
Ambient Temperature (C)
Ambient Temperature (C)
Figure 3. Maximum Load Current Thermal Derating for SOT23 Package
Figure 4. Maximum Load Current Thermal Derating for 2x2 DFN Package
Layout Guidelines
Good PCB is important for improving the thermal performance of AOZ1320. 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 AOZ1320 evaluation board can be used as a layout example. The PCB layout of AOZ1320 evaluation board is shown in Figure 5 and 6.
Figure 5. AOZ1320 (SOT23-6) PCB Layout
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AOZ1320
Figure 6. AOZ1320 (DFN2X2) PCB Layout
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AOZ1320
Package Dimensions, SOT23-6 LP
Gauge Plane D e1
6
Seating Plane L2
c L
E E1
1
e b
A
A2 aaa A1
Dimensions in millimeters
Symbols A A1 A2 b c D E E1 e e1 L L2 aaa Min. -- 0.00 0.70 0.35 0.10 2.80 2.60 1.50 Nom. -- -- 0.88 0.40 0.13 2.90 2.80 1.60 Max. 1.00 0.10 0.95 0.50 0.20 3.00 3.00 1.70
Dimensions in inches
Symbols A A1 A2 b c D E E1 e e1 L L2 aaa Min. -- 0.00 0.028 0.014 0.004 0.110 0.102 0.059 Nom. -- -- 0.035 0.016 0.005 0.114 0.110 0.063 Max. 0.039 0.004 0.037 0.020 0.008 0.118 0.118 0.067
RECOMMENDED LAND PATTERN
2.40 0.80 0.95 0.63
UNIT: mm
0.95 BSC 1.90 BSC 0.30 0.40 0.60 0.25 BSC 0.10 0 -- 8
0.037 BSC 0.075 BSC 0.012 0.016 0.024 0.010 BSC 0.004 0 -- 8
Notes: 1. Package body sizes exclude mold flash and gate burrs. Mold flash at the non-lead sides should be less than 5 mils each. 2. Dimension "L" is measured in gauge plane. 3. Tolerance 0.100mm (4 mil) unless otherwise specified. 4. Refer to JEDEC MO-193C AB. 6. Controlling dimension is millimeter. Converted inch dimensions are not necessarily exact.
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AOZ1320
Tape and Reel Dimensions, SOT23-6
Tape
P2 P1 D0 D1 E1 K0 E2 B0 E
T
P0
A0
Feeding Direction
UNIT: mm
Package SOT-23 5 & 6L LP
A0 3.15 0.10
B0 3.20 0.10
K0 1.40 0.10
D0
D1
E 8.00 0.30
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
T 0.23 0.03
1.00 1.50 0.05 +0.10/-0.00
Reel
W1
S K M J N
R
H
UNIT: mm
Tape Size 8mm
Reel Size o177.8
M o177.8 Max.
N 55.0 Min.
W1
H
S 1.5 Min
K 10.1 Min.
R 12.7
J 4.0 0.1
8.4 13.0 +1.50 / -0.0 +0.5 / -0.2
Leader/Trailer and Orientation
Trailer Tape 300mm min.
Components Tape Orientation in Pocket
Leader Tape 500mm min.
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AOZ1320
Package Dimensions, DFN 2x2 8L
D R b
E
E
E1
L D1
TOP VIEW
BOTTOM VIEW
A
c
A1 Seating Plane
SIDE VIEW
Dimensions in millimeters
RECOMMENDED LAND PATTERN
0.50 0.25 Symbols A A1 b c D D1 E E1 e L R aaa bbb ccc ddd Min. 0.70 0.00 0.18 0.15 Nom. 0.75 0.02 0.25 0.20 2.00 BSC 1.35 1.50 2.00 BSC 0.75 0.90 0.50 BSC 0.20 0.30 0.20 0.15 0.10 0.10 0.08 Max. 0.80 0.05 0.30 0.25 1.60 1.00 0.40
Dimensions in inches
Symbols A A1 b c D D1 E E1 e L R aaa bbb ccc ddd Nom. Max. 0.030 0.031 0.001 0.002 0.010 0.012 0.008 0.010 0.079 BSC 0.053 0.059 0.063 0.079 BSC 0.030 0.035 0.039 0.020 BSC 0.008 0.012 0.008 0.006 0.004 0.004 0.003 0.016 Min. 0.028 0.000 0.007 0.006
0.90
1.70
0.30 1.50 UNIT: mm
Notes: 1. Dimensions and tolerances conform to ASME Y14.5M-1994. 2. Controlling dimension is millimeter, converted inch dimensions are not necessarily exact. 3. Dimension b applied to metallized terminal and is measured between 0.10mm and 0.30mm from the terminal tip. If the terminal has the optional radius on the other end of the terminal, dimension b should not be measured in that radius area. 4. Coplanarity ddd applies to the terminals and all other bottom surface metallization.
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AOZ1320
Tape and Reel Dimensions, DFN 2 x 2
Carrier Tape
P1 K0 E2 B0 P2 D0 D1 E1 E
T
P0
A0 Feeding Direction
UNIT: mm
Package DFN 2x2
A0 2.25 0.05
B0 2.25 0.05
K0
D0
D1
E
E1
E2 3.50 0.05
P0 4.00 0.10
P1 4.00 0.10
P2 2.00 0.10
T 0.254 0.02
1.00 1.50 1.00 8.00 1.75 0.05 +0.1/-0 0.25/-0 +0.30/-0.10 0.10
Reel
W1
S R K M N
H
UNIT: mm
Tape Size Reel Size M 8mm o180 o180.00 0.50
N 60.0 0.50
W1 8.4 +1.5/-0.0
H 13.0 0.20
S 1.5 Min.
K 13.5 Min.
R 3.0 0.50
Leader / Trailer & Orientation
Trailer Tape 300mm Min.
Components Tape Orientation in Pocket
Leader Tape 500mm Min.
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AOZ1320
Package Marking
SOT-23
DFN2x2
$P $N $O $W
$L $T
$P $N: major part number $P $N: underbar = Green part $O: option/assembly location $W: week & year $L $T: assembly lot number
$P $N $O $A $Y $W $L $T
$P $N: major part number $P $N: underbar = Green part $O: options $A: assembly location $Y: year $W: week $L $T: assembly lot number
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. 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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