AP61100Q/AP61102Q AUTOMOTIVE-COMPLIANT, 5.5V INPUT, 1A LOW IQ SYNCHRONOUS BUCK CONVERTER Description Pin Assignments The AP61100Q/AP61102Q is an automotive-compliant, 1A, T(TOop P VVieIEwW) synchronous buck converter with a wide input voltage range of 2.3V to 5.5V. The device fully integrates a 110m high-side power MOSFET and an 80m low-side power MOSFET to provide high-efficiency FB 1 6 OUT FB 1 6 PG step-down DC-DC conversion. GND 2 5 EN GND 2 5 EN AP61100Q AP61102Q The AP61100Q/AP61102Q device is easily used by minimizing the external component count due to its adoption of Constant On-Time VIN 3 4 SW VIN 3 4 SW (COT) control to achieve fast transient response, easy loop stabilization, and low output voltage ripple. SOT563 SOT563 The device is available in a SOT563 package. Features Applications Qualified for Automotive Applications 5V Automotive Distributed Power Bus Supplies AEC-Q100 Qualified with the Following Results Automotive Infotainment Device Temperature Grade 1: -40C to +125C T Range Automotive Clusters A Device HBM ESD Classification Level H3A Automotive Telematics Device CDM ESD Classification Level C5 Advanced Driver Assistance Systems VIN: 2.3V to 5.5V Output Voltage (VOUT): 0.6V to 3.6V 1A Continuous Output Current 0.6V 2% Reference Voltage 15A Low Quiescent Current (Pulse Frequency Modulation) 2.2MHz Switching Frequency (VIN = 5V, VOUT = 1.8V) Up to 89% Efficiency at 5mA Light Load Programmable Operation Mode Through EN Pulse Frequency Modulation Pulse Width Modulation Regardless of Output Load Power-Good Indicator AP61102Q Protection Circuitry Undervoltage Lockout (UVLO) VIN Overvoltage Protection (OVP) Peak Current Limit Valley Current Limit Thermal Shutdown Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) The AP61100Q and AP61102Q are suitable for automotive applications requiring specific change control these parts are AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. AP61100Q/AP61102Q Typical Application Circuit INPUT INPUT VIN OUT VIN PG L L OUTPUT OUTPUT 1H 1H VOUT VOUT EN SW EN SW 1.8V 1.8V R1 C3 R1 200k 33pF 200k C1 AP61100Q C1 AP61102Q C2 C2 FB FB 10F 10F 10F 10F R2 R2 100k 100k GND GND Figure 1. Typical AP61100Q Application Circuit Figure 2. Typical AP61102Q Application Circuit VIN = 5V, VOUT = 3.3V, L = 1H VIN = 5V, VOUT = 1.8V, L = 1H VIN = 3.3V, VOUT = 2.5V, L = 1H VIN = 3.3V, VOUT = 1.8V, L = 1H 100 90 80 70 60 50 40 30 20 10 0 0.001 0.010 0.100 1.000 10.000 IOUT (A) Figure 3. PFM Efficiency vs. Output Current VIN = 5V, VOUT = 3.3V, L = 1H VIN = 5V, VOUT = 1.8V, L = 1H VIN = 3.3V, VOUT = 2.5V, L = 1H VIN = 3.3V, VOUT = 1.8V, L = 1H 100 90 80 70 60 50 40 30 20 10 0 0.001 0.010 0.100 1.000 10.000 IOUT (A) Figure 4. PWM Efficiency vs. Output Current 2 of 21 AP61100Q/AP61102Q August 2020 Diodes Incorporated www.diodes.com Document number: DS42743 Rev. 2 - 2 Efficiency (%) Efficiency (%)