Datasheet

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TPS659121
SWCS078 –JUNE 2012 www.ti.com
Table 1-1. TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
TPS659121
REFERENCE
VREF1V25 H3 O
AGND F3, C7 - analog ground connection; connect to PGND on the PCB
DRIVERS / LIGHTING
LEDA/GPIO3 B3 I/O general purpose I/O or LED driver output
LEDB/GPIO4 B2 I/O general purpose I/O or LED driver output
LEDC/GPIO5 B1 I/O general purpose I/O or LED driver output
STEP_DOWN CONVERTERS
analog supply input for DCDC converters; needs to be connected to VINDCDC1, VINDCDC2,
VINDCDC_ANA C8 I
VINDCDC3 and VINDCDC4
power input to DCDC1 converter; connect to VINDCDC2, VINDCDC3, VINDCDC4 and
VINDCDC1 H7, J7 I
VINDCDC_ANA
VDCDC1 J4 I voltage sense (feedback) input "+" for DCDC1
VDCDC1_GND H4 I voltage sense (feedback) input "GND" for DCDC1
SW1 H6, J6 O switch node of DCDC1; connect output inductor
PGND1 H5, J5 - power GND connection for DCDC1 converter
VCON_PWM F4 I PWM period signal for dynamic voltage scaling on DCDC1
VCON_CLK F5 I clock signal for dynamic voltage scaling on DCDC1
power input to DCDC2 converter; connect to VINDCDC1, VINDCDC3, VINDCDC4 and
VINDCDC2 C9 I
VINDCDC_ANA
VDCDC2 D7 I voltage sense (feedback) input for DCDC2
SW2 D9 O switch node of DCDC2; connect output inductor
PGND2 E9 - power GND connection for DCDC2 converter
power input to DCDC3 converter; connect to VINDCDC1, VINDCDC2, VINDCDC4 and
VINDCDC3 C1 I
VINDCDC_ANA
VDCDC3 F2 I voltage sense (feedback) input for DCDC3
SW3 D1 O switch node of DCDC3; connect output inductor
PGND3 E1 - power GND connection for DCDC3 converter
power input to DCDC4 converter; connect to VINDCDC1, VINDCDC2, VINDCDC3 and
VINDCDC4 A7, B7 I
VINDCDC_ANA
VDCDC4 A4 I voltage sense (feedback) input "+" for DCDC4
VDCDC4_GND B4 I voltage sense (feedback) input "GND" for DCDC4
SW4 A6, B6 O switch node of DCDC4; connect output inductor
PGND4 A5, B5 - power GND connection for DCDC4 converter
LOAD SWITCH
LSI B8, B9 I input of the load switch
LSO A8, A9 O output of the load switch
EN_LS0 C3 I load switch enable pin; the status is copied to Bit [LOADSWITCH:ENABLE0] in state CONFIG
EN_LS1 C2 I load switch enable pin; the status is copied to Bit [LOADSWITCH:ENABLE1] in state CONFIG
LOW DROPOUT REGULATORS
VINLDO1210 J2 I power input for LDO1, LDO2 and LDO10
VINLDO3 F8 I power input for LDO3
VINLDO4 F1 I power input for LDO4
VINLDO5 G8 I power input for LDO5
VINLDO67 A2 I power input for LDO6 and LDO7
VINLDO8 H8 I power input for LDO8
VINLDO9 J8 I power input for LDO9
4 INTRODUCTION Copyright © 2012, Texas Instruments Incorporated
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