The APW8820 offers a compact power supply solution to provide 2 voltages required by notebook application. The 2 PWM controllers use current-mode scheme with phase shift 180 degrees control scheme

FeaturesmRa嘉泰姆

Built in 2 PWM Controller into single chipmRa嘉泰姆

High Input Battery Voltage Range from 5.5V to 28VmRa嘉泰姆

Fixed 1.0MHz Switching Frequency for IndividualmRa嘉泰姆

ChannelmRa嘉泰姆

Built in Programmable Inductor DCR Sense FormRa嘉泰姆

Inductor Current Sense FunctionmRa嘉泰姆

Built in Current Mode Control with fully SupportmRa嘉泰姆

MLCC Output CapacitormRa嘉泰姆

Built in 180 degrees Phase Shift FunctionmRa嘉泰姆

Built in PWM/PSM/Ultra Sonic PFM (25kHz) ControlmRa嘉泰姆

SchemesmRa嘉泰姆

Built in Internal 5V/175mA and 3.3V/50mA LinearmRa嘉泰姆

RegulatorsmRa嘉泰姆

0.5V Reference VoltagemRa嘉泰姆

Built in Digital Soft-startmRa嘉泰姆

Latch Off Mode for Both ChannelsmRa嘉泰姆

Over-Temperature ProtectionmRa嘉泰姆

Built in SYSPOK Report function for 2 PWMmRa嘉泰姆

ChannelsmRa嘉泰姆

Available in TQFN4x4-24 and QFN3x3-20 PackagemRa嘉泰姆

Halogen and Lead Free Available (RoHS Compliant)mRa嘉泰姆

General Description mRa嘉泰姆

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The APW8820 offers a compact power supply solution tomRa嘉泰姆

provide 2 voltages required by notebook application. ThemRa嘉泰姆

2 PWM controllers use current-mode scheme with phasemRa嘉泰姆

shift 180 degrees control scheme allow to use MLCCmRa嘉泰姆

output capacitors. The higher fixed 1MHz switching fre-mRa嘉泰姆

quency allows to use thin and small filtered components.mRa嘉泰姆

The APW8820 provides good transient response andmRa嘉泰姆

accurate DC output voltage in either PSM or PWM Mode.mRa嘉泰姆

In Pulse Skipping Modulation Mode (PSM), the APW8820mRa嘉泰姆

provides high efficiency over light to heavy loads with load-mRa嘉泰姆

ing modulated switching frequencies. The unique ultra-mRa嘉泰姆

sonic mode maintains the switching frequency abovemRa嘉泰姆

25kHz, which eliminates noise in audio applications. ThemRa嘉泰姆

APW8820 built in individual enable control input on 2 chan-mRa嘉泰姆

nels for flexible power sequence adjustment. The power-mRa嘉泰姆

good outputs (SYSPOK) indicate the operating mode ofmRa嘉泰姆

the PWMx.mRa嘉泰姆

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The APW8820 has been equipped with excellent protec-mRa嘉泰姆

tion functions: Power-on-RESET (POR), over-current pro-mRa嘉泰姆

tection (OCP), over-voltage protection OVP, under-volt-mRa嘉泰姆

age protection (UVP) and over-temperature protectionmRa嘉泰姆

(OTP) to prevent the device operate under abnormal con-mRa嘉泰姆

dition or adjacent pin shortage.mRa嘉泰姆

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