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LM25088 Datasheet(PDF) 7 Page - Texas Instruments

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Part # LM25088
Description  LM25088, LM25088-Q1 Wide Input Range Non-Synchronous Buck Controller
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LM25088 Datasheet(HTML) 7 Page - Texas Instruments

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LM25088, LM25088-Q1
www.ti.com
SNVS609J – DECEMBER 2008 – REVISED JANUARY 2015
Electrical Characteristics
(1)(2) (continued)
TJ = -40°C to +125°C
TJ = 25°C
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP
MAX
MIN TYP(3)
MAX
SYNC
SYNC positive threshold
2.3
V
SYNC Pulse Width
15
150
ns
CURRENT LIMIT
Cycle by cycle sense voltage
VRAMP = 0V
mV
VCS(TH)
112
136
120
threshold
Cycle by Cycle Current Limit
VRAMP = 2.5V
ns
280
Delay
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
1.3
1.2
V
Vresdown
RES Threshold Lower (falling)
0.1
0.3
0.2
V
Icharge
Charge source current
VCS >= 0.125
40
65
50
µA
Idischarge
Discharge sink current
VCS < 0.125
20
34
27
µA
Discharge sink current -(post
µA
Irampdown
0.8
1.6
1.2
fault)
RAMP GENERATOR
IRAMP1
RAMP Current 1(4)
VVIN = 36V, VOUT = 10V
135
195
165
µA
IRAMP2
RAMP Current 2(4)
VVIN = 10V, VOUT = 10V
18
30
25
µA
VOUT Bias Current
VOUT = 24V
125
µA
RAMP Output Low Voltage(4)
VVIN = 36V, VOUT = 10V
200
mV
HIGH SIDE (HG) GATE DRIVER
VOLH
HG Low-state Output Voltage
IHG = 100 mA
215
115
mV
HG High-state Output Voltage
IHG = -100 mA, VOHH = VBOOT
mV
VOHH
240
- VHG
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
Pre-Charge Switch ON-
IVCC = 1 mA
72
RDS(ON)
resistance
Pre-Charge switch ON time
300
ns
THERMAL
Thermal Shutdown
Junction Temperature Rising
°C
TSD
165
Temperature
Thermal Shutdown Hysterisis
Junction Temperature Falling
25
°C
(4)
RAMP and COMP are output pins. As such they are not specified to have an external voltage applied.
Copyright © 2008–2015, Texas Instruments Incorporated
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Product Folder Links: LM25088 LM25088-Q1


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