Datasheet

TPS62125
SLVSAQ5C –MARCH 2012–REVISED DECEMBER 2013 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
T
A
= –40°C to 85°C, typical values are at T
A
= 25°C (unless otherwise noted), V
IN
= 12V
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Internal reference voltage of error
V
REF_FB
0.808 V
amplifier
Feedback voltage accuracy Referred to internal reference (V
REF_FB
) –2.5 0 2.5 %
V
FB
Feedback voltage line regulation I
OUT
= 100mA, 5V ≤ V
IN
≤ 17V, V
OUT
= 3.3V
(3)
-0.05 %/V
Feedback voltage load regulation V
OUT
= 3.3V; I
OUT
= 1mA to 300mA, V
IN
= 12V
(3)
-0.004 %/mA
I
IN_FB
Input bias current into FB pin V
FB
= 0.8 V 0 50 nA
Time from EN high to device starts switching,
t
Start
Regulator start-up time 50
V
IN
= 5V
µs
t
Ramp
Output voltage ramp time Time to ramp up V
OUT
= 1.8V, no load 200
I
LK_SW
Leakage current into SW pin
(4)
1.8 2.85 µA
VOS = V
IN
= V
SW
= 1.8 V, EN = GND, device in
shutdown mode.
I
IN_VOS
Bias current into VOS pin 0 50 nA
POWER GOOD OUTPUT (PG)
Rising V
FB
feedback voltage 93 95 97
V
TH_PG
Power Good threshold voltage %
Falling V
FB
feedback voltage 87 90 93
V
OL
PG pin Output low voltage Current into PG pin I
PG
= 0.4mA 0.3 V
V
OH
PG pin Output high voltage Open drain output, external pull up resistor 10 V
I
IN_PG
Bias current into PG pin V
(PG)
= 3V, EN = 1.3V, FB = 0.85 V 0 50 nA
(3) VOUT = 3.3V, L = 15µH, C
OUT
= 10µF
(4) An internal resistor divider network with typ. 1MΩ total resistance is connected between SW pin and GND.
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