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LM3488QMMX Scheda tecnica(PDF) 4 Page - Texas Instruments

Il numero della parte LM3488QMMX
Spiegazioni elettronici  High Efficiency Low-Side N-Channel Controller for Switching Regulators
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LM3488
LM3488-Q1
SNVS089M – JULY 2000 – REVISED MARCH 2013
www.ti.com
Electrical Characteristics (continued)
Specifications in Standard type face are for TJ = 25°C, and in bold type face apply over the full Operating Temperature
Range. Unless otherwise specified, VIN = 12V, RFA = 40kΩ
Symbol
Parameter
Conditions
Typical
Limit
Unit
VOVP(HYS)
Output Over-Voltage Protection
VCOMP = 1.4V
60
mV
Hysteresis(5)
20
mV(min)
110
mV(max)
Gm
Error Ampifier Transconductance
VCOMP = 1.4V
800
µmho
IEAO = 100µA (Source/Sink)
600/ 365
µmho (min)
1000/ 1265
µmho (max)
AVOL
Error Amplifier Voltage Gain
VCOMP = 1.4V
38
V/V
IEAO = 100µA (Source/Sink)
26
V/V (min)
44
V/V (max)
IEAO
Error Amplifier Output Current (Source/
Source, VCOMP = 1.4V, VFB = 0V
110
µA
Sink)
80/ 50
µA (min)
140/ 180
µA (max)
Sink, VCOMP = 1.4V, VFB = 1.4V
−140
µA
−100/ −85
µA (min)
−180/ −185
µA (max)
VEAO
Error Amplifier Output Voltage Swing
Upper Limit
2.2
V
VFB = 0V
1.8
V(min)
COMP Pin = Floating
2.4
V(max)
Lower Limit
0.56
V
VFB = 1.4V
0.2
V(min)
1.0
V(max)
TSS
Internal Soft-Start Delay
VFB = 1.2V, VCOMP = Floating
4
msec
Tr
Drive Pin Rise Time
Cgs = 3000pf, VDR = 0 to 3V
25
ns
Tf
Drive Pin Fall Time
Cgs = 3000pf, VDR = 0 to 3V
25
ns
VSD
Shutdown and Synchronization signal
Output = High
1.27
V
threshold (6)
1.4
V (max)
Output = Low
0.65
V
0.3
V (min)
ISD
Shutdown Pin Current
VSD = 5V
−1
µA
VSD = 0V
+1
IFB
Feedback Pin Current
15
nA
TSD
Thermal Shutdown
165
°C
Tsh
Thermal Shutdown Hysteresis
10
°C
θJA
Thermal Resistance
VSSOP-8 Package
200
°C/W
(6)
The FA/SYNC/SD pin should be pulled to VIN through a resistor to turn the regulator off.
4
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Copyright © 2000–2013, Texas Instruments Incorporated
Product Folder Links: LM3488 LM3488-Q1


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