SparkFun BabyBuck Regulator Breakout - 3.3V (AP63203) - Datasheet

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Table Of Contents

AP63200/AP63201/AP63203/AP63205

3.8V TO 32V INPUT, 2A LOW IQ SYNCHRONOUS BUCK WITH ENHANCED EMI REDUCTION

Description

The AP63200/AP63201/AP63203/AP63205

is a 2A, synchronous

buck converter with a wide input voltage

range of 3.8V to 32V and

fully integrates a 125mΩ high-side power MOSFET and a 68mΩ low-

side power MOSFET to provide high-efficiency step-

down DC/DC

conversion.

The AP63200/AP63201/AP63203/AP63205 device is

easily used by

minimizing the external component count due to its adoption of peak

current mode control along with its integrated compensation network.

The AP63200/AP63201/AP63203/AP63205 has optimized designs for

Electromagnetic Interference (EMI) reduc

tion. The converter features

Frequency Spread Spectrum (FSS) with a switching frequency jitter of

±6%, which

reduces EMI by not allowing emitted energy to stay in any

one frequency for a significant period of time.

It also has a proprietary

gate driver scheme to resist switching node ringing

without sacrificing

MOSFET turn-on and turn-off times, which further erases high-

frequency radiated EMI noise caused by MOSFET switching.

The device is available in a low-profile, TSOT26 package.

Features

• V

3.8V to 32V

• 2A Continuous Output Current

• 0.8V ± 1% Reference Voltage

• 22µA Ultralow Quiescent Current

• Switching Frequency

o 500kHz: AP63200 and AP63201

o 1.1MHz: AP63203 and AP63205

• Pulse Width Modulation (PWM) Regardless of Output Load

o AP63201

• Supports Pulse Frequency Modulation (PFM)

o AP63200, AP63203, and AP63205

o Up to 80% Efficiency at 1mA Light Load

o Up to 88% Efficiency at 5mA Light Load

• Fixed Output Voltage

o 3.3V: AP63203

o 5.0V: AP63205

• Proprietary Gate Driver Design for Best EMI Reduction

• Frequency Spread Spectrum (FSS) to Reduce EMI

• Precision Enable Threshold to Adjust UVLO

• Protection Circuitry

o Overvoltage Protection

o Cycle-by-Cycle Peak Current Limit

o Thermal Shutdown

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

3 4

VIN GND

BST

TSOT26

TOP VIEW

Applications

• 12V and 24V Distributed Power Bus Supplies

• Flat Screen TV Sets and Monitors

• Power Tools and Laser Printers

• White Goods and Small Home Appliances

• FPGA, DSP, and ASIC Supplies

• Home Audio

• Network Systems

• Set Top Boxes

• Gaming Consoles

• Consumer Electronics

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

AP63200/AP63201/AP63203/AP63205

Document number: DS41326 Rev. 2 - 2

1 of 18

www.diodes.com

January 2019

Summary of content (18 pages)

PAGE 1
AP63200/AP63201/AP63203/AP63205 3.8V TO 32V INPUT, 2A LOW IQ SYNCHRONOUS BUCK WITH ENHANCED EMI REDUCTION Description Pin Assignments The AP63200/AP63201/AP63203/AP63205 is a 2A, synchronous buck converter with a wide input voltage range of 3.8V to 32V and fully integrates a 125mΩ high-side power MOSFET and a 68mΩ lowside power MOSFET to provide high-efficiency step-down DC/DC conversion.
PAGE 2
AP63200/AP63201/AP63203/AP63205 Typical Application Circuit INPUT 3 VIN 6 BST C3 100nF L 4.7µH 2 EN AP63205 VOU T 5V 1 FB C1 10μF OUTPUT 5 SW C2 2x22μF 4 GND Figure 1. Typical Application Circuit Figure 2. Efficiency vs. Output Current Pin Descriptions Pin Number Pin Name 1 FB 2 EN 3 VIN 4 GND 5 SW 6 BST Function Feedback sensing terminal for the output voltage. Connect this pin to the resistive divider of the output. See Setting the Output Voltage section for more details.
PAGE 3
AP63200/AP63201/AP63203/AP63205 Functional Block Diagram EN 2 1.18V 20kΩ + ON - 0.4V 0.8V 1.1V Internal Reference VCC Regulator 3 VIN 1.5µA 4µA 1 + 0.6V - UVP Oscillator SE = 0.84V/T + - FB CSA + RT = 0.2V/A 6 BST Ref OCP - 0.8V Internal SS + gm + Error Amplifier VSUM COMP + - 18kΩ Logic Q1 PWM Comparator 7.6nF 5 SW Q2 4 GND Figure 3. Functional Block Diagram AP63200/AP63201/AP63203/AP63205 Document number: DS41326 Rev. 2 - 2 3 of 18 www.diodes.
PAGE 4
AP63200/AP63201/AP63203/AP63205 Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.) Symbol Parameter Rating Unit VIN Supply Voltage -0.3 to +35.0 (DC) -0.3 to +40.0 (400ms) V V VSW Switch Node Voltage -1.0 to VIN + 0.3 V VBST Bootstrap Voltage VSW - 0.3 to VSW + 6.0 V V VFB Feedback Voltage -0.3V to +6.0 VEN Enable/UVLO Voltage -0.3V to +35.
PAGE 5
AP63200/AP63201/AP63203/AP63205 Electrical Characteristics (TA = +25°C, VIN = 12V, unless otherwise specified. Min/Max limits apply across the recommended ambient temperature range, -40°C to +85°C, and input voltage range, 3.8V to 32V). Symbol ISHDN IQ UVLO Parameter Test Conditions Shutdown Supply Current VEN = 0V Supply Current (Quiescent) AP63201: VEN = OPEN, VFB = 1.0V AP63200/AP63203/AP63205: VEN = OPEN, VFB = 1.
PAGE 6
AP63200/AP63201/AP63203/AP63205 Typical Performance Characteristics (AP63200 @TA = +25°C, VIN = 12V, VOUT = 5V, unless otherwise specified.) Figure 4. Efficiency vs. Output Current, VIN = 12V Figure 5. Efficiency vs. Output Current, VIN = 24V Figure 6. Load Regulation, VOUT = 5V Figure 7. Line Regulation, VOUT = 5V Figure 8. Feedback Voltage vs. Temperature Figure 9. Power Switch RDS(ON) vs. Temperature AP63200/AP63201/AP63203/AP63205 Document number: DS41326 Rev. 2 - 2 6 of 18 www.diodes.
PAGE 7
AP63200/AP63201/AP63203/AP63205 Typical Performance Characteristics (continued) Figure 10. IQ vs. Temperature Figure 11. ISHDN vs. Temperature Figure 12. FSW vs. Temperature Figure 13. VIN POR and UVLO vs. Temperature EN (5V/div) EN (5V/div) VOUT (2V/div) IL (2A/div) VOUT (2V/div) IL (2A/div) SW (10V/div) SW (10V/div) 2ms/div 50µs/div Figure 14. Startup using EN, Iout = 2A Figure 15. Shutdown using EN, Iout = 2A AP63200/AP63201/AP63203/AP63205 Document number: DS41326 Rev. 2 - 2 7 of 18 www.
PAGE 8
AP63200/AP63201/AP63203/AP63205 Typical Performance Characteristics (continued) VOUT Ripple (20mV/div) VOUT Ripple (500mV/div) IL (1A/div) SW (10V/div) IOUT (1A/div) 2µs/div 1ms/div Figure 16. Output Ripple, Iout = 2A Figure 17. Load Transient, Iout = 1A to 2A VOUT (2V/div) VOUT (2V/div) IL (2A/div) SW (10V/div) IL (2A/div) 10ms/div SW (10V/div) Figure 18. Output Short Protection, Iout = 2A AP63200/AP63201/AP63203/AP63205 Document number: DS41326 Rev. 2 - 2 10ms/div Figure 19.
PAGE 9
AP63200/AP63201/AP63203/AP63205 Application Information INPUT 3 VIN 2 EN 6 BST AP63200 AP63201 5 SW C3 100nF L 2.2μH VOUT 1.2V C4 100pF 1 FB C1 10μF OUTPUT R1 30.9kΩ C2 2x22μF R2 62kΩ 4 GND Figure 20. Typical Application Circuit of AP63200/AP63201 INPUT 3 VIN 6 BST 2 EN 5 AP63203 SW AP63205 C3 100nF OUTPUT L VOUT 1 FB C1 10μF C2 2x22μF 4 GND Figure 21. Typical Application Circuit of AP63203/AP63205 1 PWM Operation Control The AP63200/AP63201/AP63203/AP63205 device is a 3.
PAGE 10
AP63200/AP63201/AP63203/AP63205 Application Information (continued) In order to provide a small output ripple in light load conditions, the AP63201 offers a fixed 500kHz switching frequency with FSS and Pulse Width Modulation (PWM). The hiccup mode minimizes power dissipation during prolonged output overcurrent or short conditions. The hiccup wait time is 512 cycles and the hiccup restart time is 8192 cycles.
PAGE 11
AP63200/AP63201/AP63203/AP63205 Application Information (continued) Alternatively, a small ceramic capacitor can be added from EN to GND. This delays the output startup voltage, which is useful when sequencing multiple power rails to minimize input inrush current. The amount of capacitance is calculated by equation Eq.3. Where: • • 𝑪𝒅 [𝐧𝐅] = 𝟏. 𝟐𝟕 ∙ 𝒕𝑺 [𝒎𝒔] Eq.
PAGE 12
AP63200/AP63201/AP63203/AP63205 Application Information (continued) 8 Power Derating Characteristics To prevent the regulator from exceeding the maximum junction temperature, some thermal analysis is required. The temperature rise is given by: 𝐓𝐑𝐈𝐒𝐄 = 𝐏𝐃 ∙ (𝛉𝑱𝑨 ) Eq. 4 𝐓𝑱 = 𝐓𝑨 + 𝐓𝑹𝑰𝑺𝑬 Eq. 5 Where PD is the power dissipated by the regulator and θJA is the thermal resistance from the junction of the die to the ambient temperature.
PAGE 13
AP63200/AP63201/AP63203/AP63205 Application Information (continued) Table 1 shows a list of recommended component selections for common output voltages for AP6300 and AP63201 referencing Figure 20. Output Voltage (V) 1.2 1.5 1.8 2.5 3.3 5 12 AP63200/AP63201 L (µH) R2 (kΩ) 62 2.2 62 2.2 62 3.3 62 3.3 62 6.8 30 10 18 10 R1 (kΩ) 30.9 54.2 77.
PAGE 14
AP63200/AP63201/AP63203/AP63205 Application Information (continued) 12 Output Capacitor The output capacitor keeps the output voltage ripple small, ensures feedback loop stability, and reduces the overshoot/undershoot of the output voltage during load transients. During the first few milliseconds of a load transient, the output capacitor supplies the current to the load. The converter recognizes the load transient and sets the duty cycle to maximum but the current slope is limited by the inductor value.
PAGE 15
AP63200/AP63201/AP63203/AP63205 Layout PCB Layout 1. 2. 3. 4. 5. 6. The AP63200/AP63201/AP63203/AP63205 device works at 2A current load, so heat dissipation is a major concern in the layout of the PCB. 2oz copper for both the top and bottom layers is recommended. Provide sufficient vias for the input and output capacitors’ GND side to dissipate heat to the bottom layer. Make the bottom layer under the device as the GND layer for heat dissipation.
PAGE 16
AP63200/AP63201/AP63203/AP63205 Ordering Information Please see http://www.diodes.com/package-outlines.html for additional latest information such as Mechanical Data and Device Tape Orientation. AP6320X XX - X Product Version Package Packing 0: AP63200 1: AP63201 3: AP63203 5: AP63205 WU : TSOT26 7 : Tape & Reel Part Number Mode Frequency VOUT Package Code AP63200WU-7 AP63201WU-7 AP63203WU-7 AP63205WU-7 PWM/PFM PWM Only PWM/PFM PWM/PFM 500kHz 500kHz 1100kHz 1100kHz Adjustable Adjustable 3.
PAGE 17
AP63200/AP63201/AP63203/AP63205 Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. TSOT26 D e1 01( 4x) E1/2 E/2 E1 c E Gauge Plane 0 L 01( 4x) b e L2 A2 A1 A Seating Plane Seating Plane TSOT26 Dim Min Max Typ A  1.00 — A1 0.010 0.100 — A2 0.840 0.900 — D 2.800 3.000 2.900 E 2.800 BSC E1 1.500 1.700 1.600 b 0.300 0.450 — c 0.120 0.200 — e 0.950 BSC e1 1.900 BSC L 0.30 0.50 — L2 0.
PAGE 18
AP63200/AP63201/AP63203/AP63205 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).