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TPS54308DDCR 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
封装:
TSOT-23-6
描述:
TPS54308DDCR 编带
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TPS54308DDCR数据手册
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5
TPS54308
www.ti.com
SLUSCV2 –JUNE 2017
Product Folder Links: TPS54308
Submit Documentation FeedbackCopyright © 2017, Texas Instruments Incorporated
(1) Not production tested
6.5 Electrical Characteristics
The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These
specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of
the product containing it. T
J
= –40°C to +125°C, V
IN
= 4.5 V to 28 V, (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT SUPPLY
V
IN
Input voltage range 4.5 28 V
I
Q
Non switching quiescent current EN =5 V, VFB = 1 V 300 µA
I
OFF
Shut down current EN = GND 2 µA
V
IN(UVLO)
VIN under voltage lockout
Rising V
IN
3.8 4.1 4.45 V
Falling V
IN
3.3 3.6 3.9 V
Hysteresis 400 480 600 mV
ENABLE (EN PIN)
V
(EN_RISING)
Enable threshold
Rising 1.21 1.28 V
V
(EN_FALLING)
Falling 1.1 1.19 V
I
(EN_INPUT)
Input current V
EN
= 1 V 0.7 μA
I
(EN_HYS)
Hysteresis current V
EN
= 1.5 V 1.55 μA
FEEDBACK AND ERROR AMPLIFIER
V
FB
Feedback Voltage V
IN
= 12 V 0.581 0.596 0.611 V
POWER STAGE
R
(HSD)
High-side FET on resistance T
A
= 25°C, V
BST
– SW = 6 V 85 mΩ
R
(LSD)
Low-side FET on resistance T
A
= 25°C, V
IN
= 12 40 mΩ
CURRENT LIMIT
I
(LIM_HS)
High side current limit Maximum inductor peak current 4 5 5.9 A
I
(LIM_LS)
Low side source current limit Maximum inductor valley current 3.1 4 5.5 A
I
(LIM_LSSOC)
Low side sink current limit 1.75 2.8 3.85 A
OSCILLATOR
F
sw
Centre switching frequency 255 350 445 kHz
OVER TEMPERATURE PROTECTION
Thermal
Shutdown
(1)
Rising temperature 165 °C
Hysteresis 10 °C
Hiccup time 32768 Cycles
(1) Not production tested
6.6 Timing Requirements
MIN TYP MAX UNIT
OVER CURRENT PROTECTION
t
HIC_WAIT
Hiccup wait time 512 Cycles
t
HIC_RESTART
Hiccup time before restart 16384 Cycles
t
SS
Soft-start time 5 ms
ON TIME CONTROL
t
MIN_ON
(1)
Minimum on time, measured at 90% to 90% and 1-A loading 110 ns
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