Datasheet

DEF_1
FB1
MODE/DATA
VIN
EN1
SW2
ADJ2
GND
EN2
Pow
e
r
PAD
SW1
1
2
3
4
5
10
9
8
7
6
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TPS62400, TPS62401
TPS62402, TPS62403, TPS62404
www.ti.com SLVS681E –JUNE 2006–REVISED APRIL 2010
PIN ASSIGNMENTS
TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NO.
NAME
(QFN)
Input to adjust output voltage of converter 2. In adjustable version (TPS62400) connect a external resistor
divider between VOUT2, this pin and GND to set output voltage between 0.6V and VIN. At fixed output
ADJ2 1 I
voltage version (TPS62401) this pin MUST be directly connected to the output. If EasyScale Interface is
used for converter 2, this pin must be directly connected to the output, too.
This Pin has 2 functions:
1. Operation Mode selection: With low level, Power Save Mode is enabled where the device operates
in PFM mode at light loads and enters automatically PWM mode at heavy loads. Pulling this PIN to
high forces the device to operate in PWM mode over the whole load range.
MODE/DATA 2 I/0
2. EasyScale™ Interface function: One wire serial interface to change the output voltage of both
converters. The pin has an open drain output to provide an acknowledge condition if requested. The
current into the open drain output stage may not exceed 500mA. The interface is active if either EN1
or EN2 is high.
VIN 3 Supply voltage, connect to VBAT, 2.5V to 6V
Direct feedback voltage sense input of converter 1, connect directly to Vout 1. An internal feed forward
FB1 4 I capacitor is connected between this pin and the error amplifier. In case of fixed output voltage versions or
when the Interface is used, this pin is connected to an internal resistor divider network.
This pin defines the output voltage of converter 1. The pin acts either as analog input for output voltage
setting via external resistors (TPS62400), or digital input to select between two fixed default output
voltages (TPS62401, TPS62402, TPS62403).
For the TPS62400, an external resistor network needs to be connected to this pin to adjust the default
DEF_1 5 I
output voltage.
Using the fixed output voltage device options this pin selects between two fixed default output voltages,
see table ordering information
SW1 6 I/O Switch Pin of Converter1. Connect to Inductor
EN1 7 I Enable Input for Converter1, active high
GND 8 GND for both converters; connect this pin to the PowerPAD™
EN2 9 I Enable Input for Converter 2, active high
SW2 10 I/O Switch Pin of Converter 2. Connect to Inductor.
PowerPAD™ Connect to GND
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Product Folder Link(s): TPS62400 TPS62401 TPS62402 TPS62403 TPS62404