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FUNCTIONAL BLOCK DIAGRAMS
ADJUSTABLE VERSION
_
+
Thermal
Shutdown
Bandgap
Reference
1.22V
Current
Sense
R2
GND
EN
SHUTDOWN
V
ref
UVLO
ILIM
External to
the Device
R1
UVLO
2.45V
250 kΩ
NR
FB
59 k
QuickStart
OUTIN
IN
FIXED VERSION
_
+
Thermal
Shutdown
Current
Sense
R1
R2
GND
EN
SHUTDOWN
V
ref
UVLO
ILIM
250 kΩ
NR
QuickStart
Bandgap
Reference
1.22V
UVLO
2.45V
R2 = 40 kΩ
IN
IN OUT
TPS793xx
SLVS348K – JULY 2001 – REVISED OCTOBER 2007
Table 1. Terminal Functions
TERMINAL
SOT23 SOT23 WCSP
NAME ADJ FIXED FIXED DESCRIPTION
Connecting an external capacitor to this pin bypasses noise generated by the internal bandgap.
NR 4 4 B2
This improves power-supply rejection and reduces output noise.
Driving the enable pin (EN) high turns on the regulator. Driving this pin low puts the regulator into
EN 3 3 A3
shutdown mode. EN can be connected to IN if not used.
FB 5 N/A N/A This terminal is the feedback input voltage for the adjustable device.
GND 2 2 A1 Regulator ground
IN 1 1 C3 Input to the device.
OUT 6 5 C1 Output of the regulator.
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