Datasheet

Undervoltage
Lockout
Thermal
Shutdown
Softstart
Control
Logic
Gate Driver
PMOS
Valley
Current
Sense
Error
Amplifier
V
REF
VOUT
GND
SW
VIN
NMOS
Modulator
BP
EN
A1 A2
A3
B2
C2
B3
C3
B1
C1
A1A2
A3
B2
C2
B3
C3
B1
C1
BOTTOM VIEW
TOP VIEW
TPS61253, TPS61254, TPS61256
TPS61258, TPS61259
SLVSAG8C –SEPTEMBER 2011–REVISED AUGUST 2012 www.ti.com
PIN ASSIGNMENTS
Table 1. TERMINAL FUNCTIONS
TERMINAL
I/O DESCRIPTION
NAME NO.
This is the mode selection pin of the device and is only of relevance when the device is disabled
(EN = Low). This pin must not be left floating and must be terminated. Refer to Table 3 for more
details.
BP C3 I
BP = Low: The device is in true shutdown mode.
BP = High: The output is biased at the input voltage level with a maximum load current capability of
ca. 150mA. In standby mode, the device only consumes a standby current of 22µA (typ).
This is the enable pin of the device. Connecting this pin to ground forces the device into shutdown
EN B3 I mode. Pulling this pin high enables the device. This pin must not be left floating and must be
terminated.
GND C1, C2 Ground pin.
SW B1, B2 I/O This is the switch pin of the converter and is connected to the drain of the internal Power MOSFETs.
VIN A3 I Power supply input.
VOUT A1, A2 O Boost converter output.
FUNCTIONAL BLOCK DIAGRAM
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