MAX20003 Datasheet – Fully Integrated Step-Down Converter
2A/3A Fully Integrated Step-Down Converter
MAX20003 overview
The MAX20003 is a 2A/3A Fully Integrated Step-Down Converter made by Maxim Integrated, supplied in a TQFN 20 Pin Type ( 5mm x 5mm ) package. The absolute maximum ratings table on this page lists the 9 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the MAX20003 pinout and maximum ratings, with the full datasheet PDF to preview below or download.
The MAX20002/MAX20003 are small, synchronous buck converters with integrated high-side and low-side MOSFETs. Each device is designed to deliver up to 2A/3A with input voltages from 3.5V to 36V, while using only 15µA quiescent current at no load. Voltage quality can be monitored by observing the PGOOD signal. The devices can operate in dropout by running at 98% duty cycle, making them ideal for automotive applications.
The devices offer fixed output voltages of 5V/3.3V, along with the ability to program the output voltage between 1V to 10V. Frequency can be programmed using a resistor to ground on the FOSC pin from 220kHz to 2.2MHz. The devices offer a forced fixed-frequency mode and skip mode with ultra-low quiescent current of 15µA. They have a pin that can be programmed to turn on/off the spread spectrum, further helping systems designers with better EMC management.
The MAX20002/MAX20003 are available in a small 5mm x 5mm 20-pin TQFN package with exposed pad and use very few external components.
Datasheet
MAX20003 features
- Synchronous DC-DC Converter with Integrated FETsMAX20002 = 2AMAX20003 = 3A 15µA Quiescent Current When in Standby Mode
- MAX20002 = 2A
- MAX20003 = 3A
- 15µA Quiescent Current When in Standby Mode
- Small Solution Size Saves Space220
- kHz to 2.2MHz Adjustable Frequency
- Programmable 1V to 10V Output for the Buck or Fixed 5V/3.3V Options Available
- Fixed 8ms Internal Soft-Start
- Fixed Output Voltage with ±2% Output Accuracy (5V/3.3V) or Externally Resistor Adjustable (1V to 10V) with ±1% FB Accuracy
- PGOOD Output and High-Voltage EN Input Simplify Power Sequencing
- Operating VIN Range of 3.5V to 36V
- 42V Load-Dump Protection
- 99% Duty-Cycle Operation with Low Dropout
- -40°C to +125°C Automotive Temperature Range
- AEC-Q100 Qualified
- Fast and Accurate Overvoltage Protection
- Enables Fast Recovery from Automotive Transients (MAX20002C/D and MAX20003C/D)
MAX20003 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | FOSC | Resistor-Programmable Switching-Frequency-Setting Control Input. Connect a resistor from FOSC to AGND to set the switching frequency. |
| 2 | OUT | Switching-Regulator Output. OUT also provides power to the internal circuitry when the output voltage of the converter is set between 3V to 5V during standby mode. |
| 3 | FB | Feedback Input. Connect an external resistive divider from OUT to FB and AGND to set the output voltage. Connect to BIAS to set the output voltage to 5V or 3.3V. |
| 4 | COMP | Error-Amplifier Output. Connect an RC network from COMP to AGND for stable operation. See the Compensation Network section for more details. |
| 5 | BIAS | Linear Regulator Output. BIAS powers up the internal circuitry. Bypass with a minimum of 2.2µF ceramic capacitor to ground. |
| 6 | AGND | Analog Ground |
| 7 | EN | SUP Voltage-Compatible Enable Input. Drive EN low to disable the devices. Drive EN high to enable the devices. |
| 8, 9 | SUPSW | Internal High-Side Switch Supply Input. SUPSW provides power to the internal switch. Bypass SUPSW to PGND with a 0.1µF and 4.7µF ceramic capacitors. |
| 10 | SUP | Voltage-Supply Input. SUP powers up the internal linear regulator. Bypass SUP to PGND with a 2.2µF ceramic capacitor. |
| 11 | PGOOD | Open-Drain, PGOOD Output. PGOOD asserts when VOUT is above 95% regulation point. PGOOD goes low when VOUT is below 92% regulation point. |
Absolute maximum ratings
| Parameter | Value |
|---|---|
| SPS, FOSC, COMP to AGND | 0.3V to (VBIAS + 0.3V) |
| FSYNC, PGOOD, FB to AGND | 0.3V to (VBIAS + 0.3V) |
| Output Short-Circuit Duration | Continuous |
| Continuous Power Dissipation (TA = +70°C) 20-Pin TQFN (derate 33.3mW/°C above +70°C) | 2666.7mW |
| Operating Temperature Range | -40°C to +125°C |
| Junction Temperature | +150°C |
| Storage Temperature Range | -65°C to +150°C |
| Lead Temperature (soldering, 10s) | +300°C |
| Soldering Temperature (reflow) | +260°C |
MAX20003 applications
- Point-of-Load Applications in Automotive
- Distributed DC Power Systems
- Navigation and Radio Head Units
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