Datasheet

TPS53315
SLUSAE6 –DECEMBER 2010 www.ti.com
ELECTRICAL CHARACTERISTICS
Over recommended free-air temperature range, VDD = 12 V (Unless otherwise noted)
PARAMETER CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE AND SUPPLY CURRENT
VIN pin power conversion input
V
VIN
3 15 V
voltage
V
DD
Supply input voltage 4.5 25 V
I
VIN(leak)
VIN pin leakage current V
EN
= 0 V 1 µA
VDD current, T
A
= 25°C, No Load, V
EN
= 5 V,
I
VDD
VDD supply current 420 590 µA
V
VFB
= 0.630 V
I
VDDSDN
VDD shutdown current VDD current, T
A
= 25°C, No Load, V
EN
= 0 V 10 µA
INTERNAL REFERENCE VOLTAGE
VFB voltage, CCM condition
(1)
0.6000 V
T
A
= 25°C 0.597 0.600 0.603
V
VFB
VFB regulation voltage
T
A
= 0°C to 85°C 0.5952 0.600 0.6048 V
T
A
= -40°C to 85°C 0.594 0.600 0.606
I
VFB
VFB input current V
VFB
= 0.630 V, T
A
= 25°C 0.002 0.2 µA
LDO OUTPUT
V
VREG
LDO output voltage 0 mA ≤ I
VREG
≤ 30 mA 4.77 5.0 5.35 V
I
VREG
LDO output current
(1)
Maximum current allowed from LDO 30 mA
V
DO
LDO drop out voltage V
DD
= 4.5 V, I
VREG
= 30 mA 295 mV
BOOT STRAP SWITCH
V
FBST
Forward voltage V
VREG-VBST
, I
F
= 10 mA, T
A
= 25°C 0.1 0.2 V
I
VBSTLK
VBST leakage current V
VBST
= 23 V, V
LL
= 17 V, T
A
= 25°C 0.01 1.5 µA
DUTY AND FREQUENCY CONTROL
t
OFF(min)
Minimum off time T
A
= 25°C 150 260 400
ns
V
VIN
= 17 V, V
OUT
= 0.6 V, R
RF
= 0 Ω to VREG,
t
ON(min)
Minimum on time 35
T
A
= 25°C
(1)
SOFTSTART
R
MODE
= 39 kΩ 0.7
R
MODE
= 100 kΩ 1.4
Internal SS time from V
OUT
= 0 to
t
SS
ms
V
OUT
= 95%
R
MODE
= 200 kΩ 2.8
R
MODE
= 470 kΩ 5.6
POWERGOOD
PG in from lower 92.5% 96% 98.5%
V
THPG
PG threshold PG in from higher 107.5% 110% 112.5%
PG hysteresis 2.5% 5% 7.8%
R
PG
PG transistor on-resistance 15 30 55 Ω
t
PGDEL
PG Delay after soft-start 0.8 1 1.2 ms
(1) Ensured by design. Not production tested.
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