Datasheet

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Current
Limit
Thermal
Shutdown
V
REF
1.225 V
UVLO
30
µ
A
90 k
Ω
EN1
OUT1IN
Current
Limit
OUT2
NR
EN2
250 k
Ω
Quickstart
5 pF
TPS713xx
Fixed/Fixed
FB2
RESET
0.95
×
V
REF
100 ms
Delay
(V
FB2
Rising)
TPS71319
TPS71334
SBVS055A – DECEMBER 2004 – REVISED JANUARY 2005
FUNCTIONAL BLOCK DIAGRAM
Table 1. TERMINAL FUNCTIONS
TERMINAL
DESCRIPTION
NAME DRC
IN 1 Unregulated input supply. A 0.1 µF capacitor should be connected from IN to GND.
GND 5, Pad Ground
Output of the regulator. A small 2.2 µF ceramic capacitor is required from this pin to ground to assure
OUT1 3
stability.
OUT2 4 Same as OUT1 but for LDO2.
Driving the enable pin (EN) high turns on LDO1. Driving this pin low puts LDO1 into shutdown mode,
EN1 10
reducing operating current. The enable pin should be connected to IN if not used.
EN2 8 Same as EN1 but controls LDO2.
NC 9 No connection.
FB2/NC 7 Feedback for CH2 adjustable version; no connection for non-adjustable CH2.
NR 6 Noise reduction pin; connect an external bypass capacitor to reduce LDO output noise.
Open-drain reset output; monitors OUT2. A 10 k Ω to 1 M Ω pull-up resistor is suitable for most
RESET 2
applications. The open-drain RESET pull-up voltage should not exceed V
DD
+ 0.3 V.
4