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LM25088-Q1 Scheda tecnica(PDF) 6 Page - Texas Instruments

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Il numero della parte LM25088-Q1
Spiegazioni elettronici  LM25088, LM25088-Q1 Wide Input Range Non-Synchronous Buck Controller
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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LM25088-Q1 Scheda tecnica(HTML) 6 Page - Texas Instruments

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LM25088, LM25088-Q1
SNVS609J – DECEMBER 2008 – REVISED JANUARY 2015
www.ti.com
7.5 Electrical Characteristics
(1) (2)
TJ = -40°C to +125°C
TJ = 25°C
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
MIN TYP(3)
MAX
VIN SUPPLY
IBIAS
VIN Operating Current
VFB = 1.3V
4.5
3.2
mA
ISTANDBY
VIN Standby Current
VEN = 1V
3.0
2.5
mA
ISHUTDOWN VIN Shutdown Current
VEN = 0V
24
14
µA
VCC REGULATOR
VVCC(Reg)
VCC Regulation
VVCC = open
7.4
8.2
7.8
V
VVCC(Reg)
VCC Regulation
VVIN = 4.5V,VVCC=open
4.3
4.5
V
VCC Sourcing Current Limit
VVCC = 0
25
30
mA
VCC Under-Voltage Lockout
Positive going VVCC
V
VVCC(UV)
3.7
4.2
4
Threshold
VCC Under-Voltage Hysteresis
200
mV
ENABLE THRESHOLDS
EN Shutdown Threshold
VEN Rising
320
480
400
mV
EN Shutdown Hysteresis
VEN Falling
100
mV
EN Standby Threshold
VEN Rising
1.1
1.3
1.2
V
EN Standby Hysteresis
VEN Falling
120
mV
EN Pull-up Current Source
VEN = 0V
5
µA
SOFT- START
SS Pull-up Current Source
VSS = 0V
8
13
11
µA
FB to SS Offset
VFB = 1.3V
150
mV
ERROR AMPLIFIER
FB Reference Voltage
Measured at FB Pin
V
VREF
1.187
1.223
1.205
FB = COMP
FB Input Bias Current
VFB = 1.2V
100
18
nA
COMP Sink/Source Current
3
mA
AOL
DC Gain
60
dB
FBW
Unity gain bandwidth
3
MHz
PWM COMPARATORS
THG(OFF)
Forced HG Off-time
185
365
280
ns
TON(MIN)
Minimum HG On-time
VVIN = 36V
55
ns
COMP to PWM comparator
mV
930
offset
OSCILLATOR (RT Pin)
LM25088-2 (Non-Dithering)
Fnom1
Nominal Oscillator Frequency
RRT =31.6 kΩ
180
220
200
kHz
Fnom2
RRT = 11.3 kΩ
430
565
500
kHz
LM25088-1 (Dithering)
Dithering Range
Minimum Dither Frequency
Fnom-
kHz
Fmin
5%
Maximum Dither Frequency
Fnom+
kHz
Fmax
5%
(1)
Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent at TJ = 25°C, and are
provided for reference purposes only.
(2)
Unless otherwise stated the following conditions apply: VVIN = 24V, VVCC= 8V, VEN = 5V RRT = 31.6 kΩ. No load on HG.
(3)
Typical specifications represent the most likely parametric norm at 25°C operation.
6
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