Analog Devices / Maxim Integrated MAX77511 & MAX77711 Quad-Phase Buck Converters

Analog Devices MAX77511 and MAX77711 Quad-Phase Buck Converters are four-phase, 3A/phase, configurable step-down buck regulators for 1s/2s Li+ battery inputs. The output voltage of the MAX77511 and MAX77711 is programmable through an I²C interface between 0.25V and 5.2V. Soft-start, soft-stop, and DVS slew times are also programmable. These devices feature six GPIOs which can be purposed for I/O expansion or buck status and control. Pseudo-random spread-spectrum modulation suppresses EMI.

The MAX77511 and MAX77711 Buck Converters have four combinable 3A switching phases (Φ) for up to four regulated outputs. Phases are configurable to higher-current multiphase outputs:

4Φ (single 12A output)
3Φ + 1Φ (9A output + 3A output)
2Φ + 2Φ (6A output + 6A output)
2Φ + 1Φ + 1Φ (6A output + 3A output + 3A output)
1Φ + 1Φ + 1Φ + 1Φ (four 3A outputs)

The MAX77711 integrates a 300mA PMOS low-dropout linear voltage regulator (LDO). A 100Ω active-discharge resistor is available to quickly discharge the LDOs output after the regulator has been disabled. The LDO is not available in the MAX77511.

Analog Devices MAX77511 and MAX77711 Quad-Phase Buck Converters are available in a 3.54mm x 3.54mm Wafer-Level Package (WLP) and feature a wide -40°C to +125°C operating temperature range.

Features

3A/phase configurable buck regulator
- 3A, 6A, 9A, or 12A output current capability
3V to 10V input voltage range
25V to 5.2V output voltage range
- 25V to 1.3V (5mV steps) in low-range
- 1V to 2V (20mV steps) in high-range
Pin programmable output/phase (Φ) configuration
- 4Φ, (3+1)Φ, (2+2)Φ, (2+1+1)Φ, (1+1+1+1)Φ
High-efficiency and low-heat with 2520 inductor
- 94% peak (3.3V_OUT,4V_IN)
- 85% peak (1.1V_OUT,4V_IN)

1MHz nominal switching frequency per phase
- Pseudo-random spread-spectrum options
Six multi-function GPIOs for hardware buck control
- Enable, DVS, FPWM, and Power-OK
300mA pMOS LDO (MAX77711 Only)
Built-in flexible sequencing with soft-start/stop
Protection Features
- Hard and soft-short protection, UVLO, and thermal protection
-40°C to +125°C operating temperature range
3.54mm x 3.54mm WLP-64 package

Applications

DSLR, HD video mirrorless, and action cameras
2-cell Li+/Li-ion equipment
Notebook computers and tablets

Robotics
Embedded microprocessors, FPGAs, and ASICs

Analog Devices / Maxim Integrated MAX77511 & MAX77711 Quad-Phase Buck Converters

Features

Applications

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