LP3913 Datasheet, PDF (47/70 Pages) Texas Instruments – Power Management IC for Flash Memory-Based Portable Media Players

LP3913
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IMR Register (0c)h Interrupt Mask Register
SNVS489I – NOVEMBER 2006 – REVISED SEPTEMBER 2013
Access
Data
Reset
D7–0
r/w
1: Enable INTn (n=0…7) to pull IRQB low
0: Mask Interrupt source INTn
8’h00
IRQ Register (0d)h Interrupt Request Register
Access
Data
Reset
D7–0
Read only
1: Interrupt IRQn (n=0…7) requested
0: No interrupt requested
8’h00
DC/DC Converters
Overview
The LP3913 provides the DC/DC converters that supply the various power needs of the application by means of
one Buck3 (HDD driver), two Linear Low Drop Regulators (LDO1, LDO2) and two Buck converters (BUCK1,
BUCK2).
The following table lists the output characteristics of the various regulators.
Supply Specification
Supply
LDO1
LDO2
BUCK1
BUCK2
BUCK3
Load
various
analog
CPU, DSP
IO, Logic,
Memories
Flash
Default (V)
2.0
3.3
1.2
3.3
3.3
V_OUT (Volts)
Range (V)
1.2 to 3.3
1.3 to 3.3
0.8 to 2.0
1.8 to 3.3
1.8 to 3.3
Resolution (mV)
100
100
50
100
50
I_MAXMaximum Output
Current (mA)
150
150
600
600
500
Linear Low Dropout Regulators (LDOS)
LDO1 is a regulator that can respond to fast transients and is slated for digital loads and high bandwidth analog
loads. LDO2 is a linear regulator with a similar architecture but has a slower transient response time with a lower
noise performance to supply analog loads. The output voltages of both LDOs are register programmable through
the I²C interface. The default output voltages are factory programmed during Final Test.
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