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. ● ● ● ● ● 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. ● ● ● 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 ● ● ● ● ● ● 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 www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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. www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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 www.aosmd.com 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. www.aosmd.com Page 15 of 15