Datasheet

ON/BYP
STAT
VOUT
TPS62732, TPS62733
TPS62730
SLVSAC3C –MAY 2011–REVISED DECEMBER 2012 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
V
IN
= 3.0V, V
OUT
= 2.1V, ON/BYP = V
IN
, T
A
= –40°C to 85°C typical values are at T
A
= 25°C (unless otherwise noted), C
IN
=
2.2μF, L = 2.2μH, C
OUT
= 2.2μF, see parameter measurement information
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
STAT Status Output (Open Drain)
V
TSTAT
Threshold level for STAT OUTPUT in % from V
OUT
ON/BYP = high and regulator is ready, V
IN
95
falling
%
ON/BYP = high and regulator is ready, V
IN
98
rising
(2)
V
OL
Output Low Voltage Current into STAT pin I = 500μA, V
IN
= 2.3V 0.4
V
V
OH
Output High Voltage Open drain output, external pull up resistor V
IN
I
LKG
Leakage into STAT pin ON/BYP = GND, V
IN
= V
OUT
= 3V 0 50 nA
REGULATOR
t
ONmin
Minimum ON time V
IN
= 3.0V, V
OUT
= 2.1V, I
OUT
= 0 mA 180 ns
t
OFFmin
Minimum OFF time V
IN
= 2.3V 50 ns
t
Start
Regulator start up time from transition ON/BYP = high V
IN
= 3.0V, V
OUT
= 3.0V 50 μs
to STAT = low
OUTPUT
V
REF
Internal Reference Voltage 0.70 V
V
IN
= 3.0V T
A
= 25°C –1.5 0 1.5 %
VOUT Feedback Voltage Comparator Threshold
Accuracy
T
A
= –40°C to 85°C –2.5 0 2.5
V
VOUT
DC output voltage load regulation I
OUT
= 1mA to 50mA V
IN
= 3.0V, V
OUT
= 2.1 -0.01 %/mA
V
DC output voltage line regulation I
OUT
= 20 mA, 2.4V ≤ V
IN
≤ 3.9V 0.01 %/V
I
LK_SW
Leakage current into SW pin V
IN
= V
OUT
= V
SW
= 3.0 V, ON/Byp= GND 0.0 100 nA
(3)
(2) The STAT output comparator is enabled once the rising input voltage exceeds the minimum input voltage V
IN
min of 1.9V. In case of the
1.9V output voltage option, the STAT output is active once the rising input voltage V
IN
exceeds 1.9V.
(3) The internal resistor divider network is disconnected from VOUT pin.
PIN FUNCTIONS
PIN
I/O DESCRIPTION
NAME NO
VIN 3 PWR V
IN
power supply pin. Connect this pin close to the VIN terminal of the input capacitor. A ceramic capacitor
of 2.2µF is required.
GND 4 PWR GND supply pin. Connect this pin close to the GND terminal of the input and output capacitor.
ON/BYP 5 IN This is the mode selection pin of the device. Pulling this pin to low forces the device into ultra low power
bypass mode. The output of the DC/DC converter is connected to VIN via an internal bypass switch.
Pulling this pin to high enables the DC/DC converter operation. This pin must be terminated and is
controlled by the system. In case of CC2540, connect this to the power down signal which is output on one
of the P1.x ports (see CC2540 user guide).
SW 2 OUT This is the switch pin and is connected to the internal MOSFET switches. Connect the inductor to this
terminal.
VOUT 6 IN Feedback Pin for the internal feedback divider network and regulation loop. The internal bypass switch is
connected between this pin and VIN. Connect this pin directly to the output capacitor with short trace.
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Product Folder Links: TPS62732 TPS62733 TPS62730