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LM25141RGER bảng dữ liệu(PDF) 6 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  Wide Input Range Synchronous Buck Controller
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LM25141RGER bảng dữ liệu(HTML) 6 Page - Texas Instruments

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LM25141
SNVSAU1 – MARCH 2017
www.ti.com
Product Folder Links: LM25141
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
(1)
All minimum and maximum limits are specified by correlating the electrical characteristics to process and temperature variations and
applying statistical process control.
(2)
The junction temperature (TJ in ºC) is calculated from the ambient temperature (TA in ºC) and power dissipation (PD in Watts) as follows:
TJ = TA + (PD × RθJA) where RθJA (in °C/W) is the package thermal impedance provided in the Thermal Information section.
6.5 Electrical Characteristics
TJ = –40°C to +125°C, Typical values TJ = 25°C, VIN = 12 V, VCCX = 5 V, VOUT = 5 V, EN = 5 V, OSC = VDD, FSW = 2.2
MHz, no-load on the Drive Outputs (HO, HOL, LO, and LOL outputs), over operating free-air temperature range (unless
otherwise noted)
(1) (2)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN SUPPLY VOLTAGE
ISHUTDOWN
Shutdown mode current
VIN = 8–18 V, EN = 0 V, VCCX = 0 V
10
12.5
µA
ISTANDBY
Standby current
EN = 5 V, FB = VDD, VOUT in
regulation, no-load, not switching,
DEMB = GND.
35
45
µA
EN = 5 V, FB = 0 V, VOUT in
regulation, no-load, not switching,
VCCX = 5 V, DEMB = GND.
42
55
VCC REGULATOR
VCC(REG)
VCC regulation voltage
VIN = 6–18 V, 0–75 mA, VCCX = 0 V
4.75
5
5.25
V
VCC(UVLO)
VCC under voltage threshold
VCC rising, VCCX = 0 V
3.25
3.4
3.55
V
VCC(HYST)
VCC hysteresis voltage
VCCX = 0 V
175
mV
ICC(LIM)
VCC sourcing current limit
VCCX = 0 V
85
125
mA
VDDA
VDDA(REG)
Internal bias supply power
VCCX = 0 V
4.75
5
5.25
V
VDDA(UVLO)
VCC rising, VCCX = 0 V
3.1
3.2
3.3
V
VDDA(HYST)
VCCX = 0 V
125
mV
RVDDA
VCCX = 0 V
55
Ω
VCCX
VCCX(ON)
VCC rising
4.1
4.3
4.4
V
VCCX(HYST)
80
mV
R(VCCX)
VCCX = 5 V
2
Ω
OSCILLATOR SELECT THRESHOLDS
Oscillator select threshold 2.2 MHz
(OSC pin)
2.0
V
Oscillator select threshold 440 kHz
(OSC pin)
0.8
V
CURENT LIMIT
V(CS)
Current limit threshold
ILSET = VDDA, measure from CS to
VOUT
68
75
82
mV
tdly
Current sense delay to output
40
ns
Current sense amplifier gain
11.4
12
12.6
V/V
ICS(BIAS)
Amplifier input bias
10
nA
RES
I(RES)
RES current source
20
µA
V(RES)
RES threshold
1.2
V
Timer
Timer hiccup mode fault
512
cycles
RDS(ON)
RES pull-down
4
Ω
OUTPUT VOLTAGE REGULATION
3.3 V
VIN = 3.8–42 V
3.273
3.3
3.327
V
5 V
VIN = 5.5–42 V
4.96
5.0
5.04
V
FEEDBACK
VOUT select threshold 3.3 V
VDD - 0.3
V
Regulated feedback voltage
1.193
1.2
1.207
V
FB(LOWRES)
Resistance to ground on FB for FB
= 0 detection
500
Ω


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