ISL80083 Datasheet, PDF (1/21 Pages) Intersil Corporation – 2.5MHz Integrated Power Management IC with I2C Compatible Interface

2.5MHz Integrated Power Management IC with I²C
Compatible Interface
ISL80083
ISL80083 is an integrated mini Power Management IC
(mini-PMIC) for powering low-voltage microprocessor, or
applications using a single Li-Ion or Li-Polymer cell battery to
power multiple voltage rails. ISL80083 integrates a
high-efficiency 2.5MHz synchronous step-down converter, a
low-input low-dropout linear regulator, 33MHz oscillator, level
shift, and input supply select.
The 2.5MHz PWM switching frequency allows for the use of
very small external inductors and capacitors. The step-down
converter can enter skip mode under light load conditions to
further improve the efficiency and maximize the battery life.
For noise sensitive applications, it can also be programmed
through I²C interface to operate in forced PWM mode,
regardless of the load current condition. The I²C interface
supports on-the-fly control of the output voltage from 0.625V
to 2.225V at 25mV/step size for dynamic power saving. The
step-down converter can supply up to 800mA load current.
ISL80083 also provides a 300mA low dropout (LDO) regulator.
The input voltage range is from 2.6V to 5.5V allowing it to be
powered from one of the on-chip step-down converters or directly
from the battery. The default LDO output comes with factory
pre-set fixed output voltage options between 0.9V to 3.6V.
ISL80083 is available in a 2.11mm x 2.13mm 25 Ball CSP
package.
Features
• 800mA synchronous step-down converter and 300mA,
general-purpose LDO
• 400kb/s I²C-bus series interface transfers the control data
between the host controller and the ISL80083
• Fixed SMPS output voltage I²C programmability
- At 25mV/step. . . . . . . . . . . . . . . . . . . . . . 0.625V to 2.225V
• LDO output voltage I²C programmability
- At 50mV/step. . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9V to 3.6V
• 33MHz oscillator
• Level shift from 1.8V to 3V with enable
• Input select
• Switcher I²C programmable skip mode under light load or
forced fixed switching frequency PWM mode
Applications
• Power cable
100
90 _{1V - PFM}
80
70
60
50
40
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT LOAD (A)
FIGURE 1. EFFICIENCY vs LOAD (3.3V_IN, T_{A =} +25°C)
May 15, 2013
1
FN7886.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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