LP8720 Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – One Step-Down DC/DC and Five Linear Regulators with I2C Compatible Interface

LP8720
November 30, 2009
One Step-Down DC/DC and Five Linear Regulators with I2C
Compatible Interface
General Description
The LP8720 is a multi-function, programmable Power Man-
agement Unit, optimized for sub block power requirement
solution. This device integrates one highly efficient 400 mA
step-down DC/DC converter with Dynamic Voltage Scale
(DVS), five low noise low dropout (LDO) voltage regulators
and a 400 KHz I²C-compatible interface to allow a host con-
troller access to the internal control registers of the LP8720.
The LP8720 additionally features programmable power-on
sequencing.
LDO regulators provide high PSRR and low noise ideally suit-
ed for supplying power to both analog and digital loads. The
package will be the smallest 2.5 mm x 2.0 mm micro SMD
20–bump package.
Applications
■ ^{Cellular Handsets}
■ ^{Portable hand-held products}
Features
■ ^{5 Low Noise LDO’s for up to 300 mA}
■ ^{One high-efficiency Synchronous Magnetic Buck}
Regulator, I_OUT 400 mA
High efficiency PFM mode @low I_OUT
Auto Mode PFM/PWM switch
Low inductance 2.2 µH @ 2 MHz clock
Dynamic Voltage Scale control
■ ^{I2C-compatible interface for the controlling of internal}
registers
■ ^{20–bump 2.5 x 2.0 mm micro SMD package}
Key Specifications
■ ^{Programmable Vout from 0.8V to 2.3V on DC/DC}
■ ^{Automatic soft start on DC/DC}
■ ^{200 mV typ Dropout Voltage at 300 mA on LDO’s}
■ ^{2% (typ) Output Voltage accuracy on LDO’s}
Typical Application Diagram
© 2009 National Semiconductor Corporation 300675
30067501
www.national.com