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LM25088 Datenblatt(PDF) 5 Page - Texas Instruments

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Teilenummer LM25088
Bauteilbeschribung  Wide Input Range Non-Synchronous Buck Controller
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Hersteller  TI1 [Texas Instruments]
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LM25088
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SNVS609G – DECEMBER 2008 – REVISED MARCH 2011
Electrical Characteristics (continued)
Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C
to +125°C. 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. Unless otherwise stated the following conditions apply: VVIN =
24V, VVCC= 8V, VEN = 5V RRT = 31.6 kΩ, No load on HG. See note
(1).
Symbol
Parameter
Conditions
Min
Typ(1)
Max
Units
Buck Switch VDS protection
VIN to SW
1.5
V
CURRENT LIMIT RESTART (RES Pin)
Vresup
RES Threshold Upper (rising)
VCS = 0.125
1.1
1.2
1.3
V
Vresdown
RES Threshold Lower (falling)
0.1
0.2
0.3
V
Icharge
Charge source current
VCS >= 0.125
40
50
65
µA
Idischarge
Discharge sink current
VCS < 0.125
20
27
34
µA
Irampdown
Discharge sink current -(post fault)
0.8
1.2
1.6
µA
RAMP GENERATOR
IRAMP1
RAMP Current 1(2)
VVIN = 36V, VOUT = 10V
135
165
195
µA
IRAMP2
RAMP Current 2(2)
VVIN = 10V, VOUT = 10V
18
25
30
µA
VOUT Bias Current
VOUT = 24V
125
µA
RAMP Output Low Voltage(2)
VVIN = 36V, VOUT = 10V
200
mV
HIGH SIDE (HG) GATE DRIVER
VOLH
HG Low-state Output Voltage
IHG = 100 mA
115
215
mV
VOHH
HG High-state Output Voltage
IHG = -100 mA, VOHH = VBOOT - VHG
240
mV
HG Rise Time
Cload = 1000 pF
12
ns
HG Fall Time
Cload = 1000 pF
6
ns
IOHH
Peak HG Source Current
VHG = 0V
1.5
A
IOLH
Peak HG Sink Current
VHG = VVCC
2
A
BOOT UVLO
BOOT to SW
3
V
Pre RDS(ON)
Pre-Charge Switch ON- resistance
IVCC = 1 mA
72
Pre-Charge switch ON time
300
ns
THERMAL
TSD
Thermal Shutdown Temperature
Junction Temperature Rising
165
°C
Thermal Shutdown Hysterisis
Junction Temperature Falling
25
°C
θJC
Thermal Resistance
Junction to Case
6
°C /W
θJA
Thermal Resistance
Junction to Ambient
40
°C /W
(2)
RAMP and COMP are output pins. As such they are not specified to have an external voltage applied.
Copyright © 2008–2011, Texas Instruments Incorporated
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