Programmable Current-Limited Load Switch Preliminary DATASHEET (S

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Programmable Current-Limited Load Switch Preliminary DATASHEET (S

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AOZ1360
Programmable Current-Limited Load Switch
Preliminary DATASHEET (Specifications subject change)
AOZ1360 member Alpha Omega Semiconductor's high-side load switch family intended applications that require circuit protection. device operates from voltages between 5.5V 28V, handle continuous current internal current limiting circuit protects input supply voltage from large load current. current limit with external resistor. AOZ1360 provides thermal protection function that limits excessive power dissipation. device employs internal soft-start circuitry control inrush current highly capacitive loads associated with hot-plug events. features quiescent current 220µA supply current reduces less than shutdown. AOZ1360 available SO-8 4x4DFN10 package which operate over -40°C +85°C temperature range.
Features
maximum resistance minimum continuous current. Programmable current limit 5.5V operating input voltage quiescent current Under-voltage lockout Thermal shutdown protection 2.5kV rating Available SO-8 x4mm DFN-10 package
Applications
Notebook swap supplies
Typical Application Circuit
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
Ordering Information
Part Number AOZ1360AI AOZ1360DI Package SO-8 DFN4x4 Temperature Range -40°C +85°C -40°C +85°C Environmental RoHS RoHS
Configuration
VIEW SO-8
VIEW
DFN4X4
Note: Connect pins externally.
Description
SO-8 Number DFN4x4 Number 9,10 Name Function
P-channel MOSFET source. Connect capacitor from GND.
Ground. Soft-Start Pin. Connect capacitor from soft-start time. Connect default soft-start time 100us. Enable Input. options available: active high active low. Ordering Information details. Current Limit Pin. Connect resistor from switch current limit. Connect P-channel MOSFET Drain. Connect 0.1uF capacitor from GND.
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
Absolute Maximum Ratings(1)
.-0.3V +30V SET, GND.-0.3V 0.3V SET.-0.3V Maximum Continuous Current. Maximum Junction Temperature (TJ).+150°C Rating (HBM) .2.5kV
Operating Ratings
Thermal Resistance (SO-8) .82°C/W Thermal Resistance (DFN4X4).63°C/W
Electrical Characteristics
12V, -40°C +85°C unless otherwise stated. Typical values 25°C
Parameter Input Supply Voltage Undervoltage Lockout Threshold Undervoltage Lockout Hysteresis Input Quiescent Current Input Shutdown Current Output Leakage Current Switch Resistance Switch Resistance Current Limit Enable Input Voltage Enable Input High Voltage Enable Input Hysteresis Enable Input Bias Current Turn-On Delay Time EN_50% OUT_10% Turn-On Rise Time OUT_10% Turn-Off Fall Time Thermal Shutdown Threshold Thermal Shutdown Hysteresis
Symbol VUVLO VUVHYS IIN_ON IIN_OFF ILEAK RDS(ON) RDS(ON) ILIM VEN_H VEN_L VEN_HYS IEN_BIAS Td_on
Conditions rising
UNITS
-00, -01, load -00, -01, load -00, -01, load AOZ1360AI AOZ1360AI 5.5V RSET 84.5k (SO8) RSET (DFN)
RL=120, Floated RL=120, Floated RL=120, RL=120, Floated
tOFF TSD_HYS
Stresses beyond Absolute Maximum Ratings cause permanent damage device. Depends gate loading discrete PMOS, confirmed silicon data.
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
Typical Operating Characteristics Functional Characteristics Turn-On
(Vin 12V, 5.6)
Turn-Off
(Vin 12V, 5.6)
2V/div
2V/div
Vout 2V/div
Vout 2V/div
1V/div
1V/div
Iout 0.5A/div 1ms/div Current Limit
(Vin 12V, 3.6)
Iout 0.5A/div 20us/div Over Temperature
(Vin 12V, 3.6)
5V/div
2V/div
Vout 2V/div
Vout 2V/div 1V/div
1V/div Iout 0.5A/div 5ms/div
Iout 0.5A/div 100ms/div
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
Timing Diagram
TD(OFF)
TD(ON)
Figure AOZ1360 Timing Diagram
Functional Block Diagram
Figure Functional Block Diagram
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
Detailed Description Introduction
AOZ1360 P-channel high-side load switch with adjustable soft-start slew-rate control, programmable current limit thermal shutdown. operates with input voltage range from 5.5V handle continuous current Enable Enable ON/OFF control output switch. It's active-high input. active after above UVLO threshold Conversely, Enable will de-activated falls below UVLO 2.0V. must driven logic high logic state guarantee operation. While disabled, AOZ1360 only draws about supply current. high impedance input with protection diode ground should forced below ground. This input level compatible with most microcontroller outputs other logic families. Under-Voltage Lockout (UVLO) under-voltage lockout (UVLO) circuit AOZ1300 monitors input voltage prevents output MOSFET from turning until exceeds 4.9V.
Adjustable Soft-Start Slew-Rate Control
When asserted high, slew rate control circuitry applies voltage gate PMOS switch manner such that output voltage current ramped linearly until reaches steady-state load current level. slew rate adjusted external capacitor connected ground. slew rate rise time, Ton, using following equation:
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
Programmable current Limit
current limit programmed external resistor connected ground. This sets reference voltage current limit error amplifier that compares sensed voltage that generated passing small portion load current through internal amplifier. When sensed load current exceeds current limit, load current then clamped limit Vout drops whatever voltage necessary clamp load current. AOZ1360 will stay this condition until load current longer exceeds current limit thermal shutdown protection engaged. current limit below graph
AOZ1360 Rset Ilimit
Ilimit
1.00E+04
1.00E+05 Rset (ohms)
1.00E+06
1.00E+07
Thermal-Shutdown Protection
During current limit short circuit conditions PMOS resistance increased clamp load current. This increases power dissipation chip causing temperature rise. When temperature reaches 130°C thermal shutdown circuitry will shutdown device. There 30°C hysterisys after which device will turn back thru soft start. thermal shutdown will cycle repeatedly until short circuit condition disappears enable pulled external monitor.
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
Applications Information Input Capacitor Selection
larger capacitor input bypassing. This will limit input voltage drop during output transient conditions. capacitor should adequate most applications; however, higher capacitor values will further reduce voltage drop. Place bypass capacitor close pins feasibly possible.
Output Capacitor Selection
0.1uF larger capacitor between pins. capacitance does affect turn slew rate; however, larger capacitor will make initial turn transient smoother.
Power Dissipation Calculation
Calculate power dissipation normal load condition using following equation: (IOUT)2 worst case power dissipation occurs when load current hits current limit over-current short circuit faults. power dissipation under these conditions calculated using following equation: (VIN VOUT) ILIMIT
Layout Guidelines
Good layout important improving thermal overall performance AOZ1360. optimize switch response time output short-circuit conditions keep traces short possible reduce effect unwanted parasitic inductance. Place input output bypass capacitors close possible pins. input output traces should wide possible given space. ground plane enhance power dissipation capability device.
AOZ1360AI (SO-8) Layout
AOZ1360DI (4x4 DFN) Layout
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
AOZ1360 Package Marking SO-8
DFN4x4
LOGO
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
Package Dimensions, DFN4X4
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential
Alpha Omega Semiconductor
AOZ1360
AOZ1360 Preliminary Data Sheet Rev0
Alpha Omega Semiconductor Confidential

Programmable Current-Limited Load Switch Preliminary DATASHEET (S

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