MAX77801 Datasheet, PDF (1/25 Pages) Maxim Integrated Products – Flexibility Supports Various Designs

MAX77801
EVALUATION KIT AVAILABLE
High-Efficiency Buck-Boost Regulator
General Description
The MAX77801 is a high-current, high-efficiency buck-
boost targeted to mobile applications that use a Li-ion bat-
tery or similar chemistries. The MAX77801 utilizes a four-
switch H-bridge configuration to support buck and boost
operating modes. Buck-boost provides 2.60V to 4.1875V
of output voltage range and up to 2A output current.
A unique control algorithm allows high efficiency, out-
standing performances in line/load transient response,
and seamless transition between buck and boost modes.
DVS (dynamic voltage scaling) input allows the host
processor to switch between two preprogrammed output
voltages. This feature minimizes power loss for given load
conditions. The ramp-up and ramp-down slew rates are
programmable through I²C.
The MAX77801 features I²C-compatible, 2-wire serial
interface consisting of a bidirectional serial-data line
(SDA) and a serial-clock line (SCL). It supports SCL clock
rates up to 3.4MHz.
Applications
●● Smartphones and Tablets
●● Battery-Powered Applications
Benefits and Features
●● 2A High-Efficiency Buck and Boost Operation
Including Seamless Transition Between Buck
and Boost Mode
●● Flexibility Supports Various Designs
• V_OUT Range from 2.60V to 4.1875V with 12.5mV Step
• High-Speed (Up to 3.4MHz) I²C Serial Interface
●● Low Quiescent Current, High Efficiency, and Dynamic
Voltage Scaling Enable System to Be More Efficient
• DVS Input
• Up to 97% of Peak Efficiency
• 55µA Quiescent Current
●● High Switching Frequency and Small Package
Reduce Solution Size
• 2.5MHz Switching Frequency
• 20-Bump WLP (0.4mm Pitch)
●● Safety Features Enhance Device and System Reliability
• POK Output
• Soft-Start
• True Shutdown™
• Thermal Shutdown and Short-Circuit Protection
Typical Application Circuit
1µH
VIN
10µF
1µF
VIO
1.5kΩ
POK
SDA
SCL
1.5kΩ
100kΩ
0.1µF
LXBB1
INBB
VSYS
LXBB2
OUTBB
FB_BB
PGNDBB
VIO ^MAX77801
POK
EN
SDA
DVS
SCL
GND
VOUT
47µF
EN
DVS
Ordering Information appears at end of data sheet.
True Shutdown is a trademark of Maxim Integrated Products, Inc.
19-7515; Rev 0; 2/15