PDF AAT1107 Data sheet ( Hoja de datos )

Número de pieza	AAT1107
Descripción	BUCK BOOST & BOOST PWM CONTROLLER
Fabricantes	Advanced Analog Technology
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No Preview Available ! Advanced Analog Technology, Inc. Details are subject to change without notice. AAT1107 BUCK_BOOST & BOOST PWM CONTROLLER WITH ADJUSTABLE LDO www.DataShFeEet4AU.cTomURES z Complete PWM Power Control Circuitry CH1: Buck_Boost, CH2: Boost z Adjustable Low Dropout (LDO) Regulator z Under-Voltage Lockout (UVLO) Protection z Totem Pole Output z Output Short Circuit Protection z Dead Time Control : 0% to 100% z Wide Operating Frequency: 10kHz to 800kHz PIN CONFIGURATION TOP VIEW Ct 1 Rt 2 16 VREF 15 SCP IE3 3 14 OUT3 IE1 4 13 IE2 OE1 5 12 OE2 DTC1 OUT1 GND 6 11 7 10 89 TSSOP-16 PACKAGE DTC2 OUT2 VDD GENERAL DESCRIPTION The AAT1107 provides an integrated two-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system. This device offers system engineers the flexibility to tailor-make the power supply circuitry for the specific applications. Each channel contains its own error amplifier, PWM comparator, dead-time control (DTC) and output driver. The two channels share common features of under-voltage protection, oscillator, short circuit protection and voltage reference circuit. Two dead-time control inputs are assigned for channel (CH1) and channel 2 (CH2) individually, and dead-time control inputs can be used to control on/off operation. The AAT1107 contains one step-up (boost) circuit at CH2 and one inverting (buck_boost) circuit at CH1. In addition, DTC can be set to provide 0% to 100% dead-time through a resistive divider network and soft-start can be implemented by paralleling the DTC resistor with a capacitor. The Maximum output current of LDO regulator can be enlarged by connecting an nMOSFET (or NPN bipolar) as a source follower stage at OUT3 pin. –– – Advanced Analog Technology, Inc. – Page 1 of 16 V 1.0 1 page Advanced Analog Technology, Inc. AAT1107 ELECTRICAL CHARACTERISTICS, VDD = 5.0V (UNLESS OTHERWISE SPECIFIED) (SEE NOTE 1) (CONT.) Reference Voltage Parameter www.DataSheet4IUn.tceormnal Reference Voltage Reference Voltage Input Voltage Regulation Output Regulation Symbol VREFi VREF VRI VRO Test Condition IREF = −1mA , TC = 25o C IREF = −1mA , TC = 25o C IREF = −1mA , VDD =4.0V to 6.0V IREF = −0.1mA to −1mA Min Typ 1.220 1.233 2.430 2.505 -1 -1 Max 1.246 2.580 5 - Unit V mV mV EA (Error Amplifier) Parameter Input Offset Voltage Input Bias Current Input Voltage Range Open-Loop Voltage Gain Output Voltage Swing Output Sink Current Output Source Current Common-Mode Rejection Ratio VIO I IB VIR A VO VOS+ VOS− IOS+ IOS− Test Condition CH1, CH2 CH1, CH2 OE=1.25V OE=1.25V CMRR Min Typ Max Unit - - 6 mV - ± 15 ± 100 nA 0.5 - 1.6 V 70 85 - dB 2.3 2.5 - V - 0.7 0.9 3 20 - mA - − 75 − 45 µA 60 80 - dB Operating Current Parameter Supply Current IDD−OFF I DD−ON Test Condition Output ”OFF” State R OSC = 10kΩ Min Typ Max Unit - 1.8 - mA - 2.0 - mA –– – Advanced Analog Technology, Inc. – Page 5 of 16 V 1.0 5 Page Advanced Analog Technology, Inc. BOOST STEP-UP TIMING CHART CH-2 AAT1107 www.DataSheet4U.com Note: t scp ≅ CSCP Vr2 ISCP –– – Advanced Analog Technology, Inc. – Page 11 of 16 V 1.0 11 Page

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