TPS62355DRCR Datasheet, PDF (31/46 Pages) Texas Instruments – 800-mA / 1000-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER

TPS62350, TPS62351
TPS62352, TPS62353
TPS62354, TPS62355, TPS62356
www.ti.com .............................................................................................................................................................. SLVS540E – MAY 2006 – REVISED APRIL 2008
REGISTER DESCRIPTION
VSEL0 REGISTER (READ/WRITE)
MSB
7
65
4
32
LSB
Memory location: 00
1
0 _{Reset state: X1XX XXXX – See the Ordering}
Information Table
VOLTAGE STEP MULTIPLIER, VSM0
6-bit unsigned binary linear coding.
Code effective from 0 to 63 decimal
LIGHTPFM OPTIMIZE
0 : LightPFM optimized for 2.2-mH inductor
1 : LightPFM optimized for 1-mH inductor (default)
This bit is internally mapped by VSEL1[6]. Writing a
value in VSEL0[6] automatically updates VSEL1[6].
EN_DCDC
This bit gates the external EN pin signal
0 : Device in shutdown regardless of EN signal
1 : Device enabled when EN pin tied high (default)
This bit is internally mapped by VSEL1[7]. Writing a
value in VSEL0[7] automatically updates VSEL1[7].
A. TPS62350, 51, 52, 53, 54, 55: Output Voltage = Minimum Output Voltage + (Voltage Step Multiplier 0 x 12.5 mV)
B. TPS62356: Output Voltage = Minimum Output Voltage + (Voltage Step Multiplier 0 x 25 mV)
VSEL1 REGISTER (READ/WRITE)
MSB
7
65
4
32
LSB
Memory location: 01
1
0 _{Reset state: X1XX XXXX – See the Ordering}
Information Table
VOLTAGE STEP MULTIPLIER, VSM1
6-bit unsigned binary linear coding.
Code effective from 0 to 63 decimal
LIGHTPFM OPTIMIZE
0 : LightPFM optimized for 2.2-mH inductor
1 : LightPFM optimized for 1-mH inductor (default)
This bit is internally mapped by VSEL0[6]. Writing a
value in VSEL1[6] automatically updates VSEL0[6].
EN_DCDC
This bit gates the external EN pin signal
0 : Device in shutdown regardless of EN signal
1 : Device enabled when EN pin tied high (default)
This bit is internally mapped by VSEL0[7]. Writing a
value in VSEL1[7] automatically updates VSEL0[7].
A. TPS62350, 51, 52, 53, 54, 55: Output Voltage = Minimum Output Voltage + (Voltage Step Multiplier 1 x 12.5 mV)
B. TPS62356: Output Voltage = Minimum Output Voltage + (Voltage Step Multiplier 1 x 25 mV)
Copyright © 2006–2008, Texas Instruments Incorporated
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Product Folder Link(s): TPS62350, TPS62351 TPS62352, TPS62353 TPS62354, TPS62355, TPS62356