Datasheet

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Thermal
Shutdown
Bandgap
Reference
1.225 V
V
IN
Current
Sense
R
2
IN
GND
EN
OUT
SHUTDOWN
V
ref
UVLO
ILIM
External to
the Device
FB
R
1
UVLO
250 kΩ
NR
(1)
(1) Not Available on DCQ (SOT223) options.
Quickstart
_
+
Thermal
Shutdown
V
IN
Current
Sense
R
1
R
2
IN
GND
EN
OUT
SHUTDOWN
V
ref
UVLO
ILIM
Bandgap
Reference
1.225 V
UVLO
250 kΩ
NR
Quickstart
R
2
= 40k
TPS794xx
SLVS349E – NOVEMBER 2001 – REVISED DECEMBER 2005
FUNCTIONAL BLOCK DIAGRAM—ADJUSTABLE VERSION
FUNCTIONAL BLOCK DIAGRAM—FIXED VERSION
Terminal Functions
TERMINAL
DESCRIPTION
DGN DCQ
NAME
(MSOP) (SOT223)
Connecting an external capacitor to this pin bypasses noise generated by the internal bandgap, which
NR 4 5
improves power-supply rejection and reduces output noise.
The EN terminal is an input that enables or shuts down the device. When EN is a logic high, the device
EN 6 1
is enabled. When the device is a logic low, the device is in shutdown mode.
FB 3 5 Feedback input voltage for the adjustable device.
GND 5, PAD 3, 6 Regulator ground
IN 8 2 Unregulated input to the device.
NC 2, 7 No internal connection.
OUT 1 4 Regulator output
4
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