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LM3017 датащи(PDF) 4 Page - Texas Instruments

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номер детали LM3017
подробное описание детали  High Efficiency Low-Side Controller with True Shutdown
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домашняя страница  http://www.ti.com
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LM3017
SNOSC66C – MARCH 2012 – REVISED MARCH 2013
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Limits in standard type are for TJ = 25°C only; limits 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 the most
likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the following
conditions apply: VIN = 12V.
SYMBOLS
PARAMETER
TEST CONDITIONS
MIN(1)
TYP(2)
MAX(1)
UNIT
Supply Current in Boost Mode - No
IQ-boost
EN/MODE = 1.6V, FB = 1.4V
5.2
9
mA
switching
IQ-SD
Supply Current in Shutdown Mode
EN/MODE pin = 0.4V
0.025
1
µA
Supply Current in Pass-Through
IQ-pass
EN/MODE = 2.6V, FB = 1.4V
1.4
2.3
mA
mode
Ven-pass
Pass-Through Mode Threshold (3)
Rising
2.19
2.4
2.56
V
Vmode-hyst
Mode change hysteresis, falling(3)
Falling
65
107
165
V
Ven-shutdown
Shut-down Mode Threshold (3)
Falling
0.2
0.4
0.59
V
Ven-boost
Boost Mode Enable Window(3)
Rising
0.65
1.22
1.6
V
Ien
EN/MODE pin bias current (4)
EN/MODE = 1.6V
±1.0
µA
Cycle-by-Cycle Current Limit
EN/MODE = 1.6V
VSENSE
142
170
182
mV
Threshold during boost mode
FB = 50V
Short Circuit Current Limit
ΔVSC
EN/MODE = 1.6 V, FB = 0 V
18
30
42
mV
Threshold during boost mode
Internal Ramp Compensation
VSL
90
mV
Voltage
Input Current Limit Threshold
VLIM1
Voltage in Pass-Through mode
EN/MODE = 2.6V
70
85
95
mV
during TLIM1
(3)
Input Current Limit Threshold
ΔVLIM2
Voltage in Pass-Through mode
EN/MODE = 2.6V
14.5
18
21
mV
during TLIM2
(3)
TLIM1
Curent Limit Time at TLIM1
(3)
900
µs
TLIM2
Current Limit Time at TLIM2
(3)
3.6
ms
TSC
Current Limit Time at TSC
(3)
900
µs
Rising threshold measured at FB pin with
Upper Output-Over Voltage
respect to FB pin,
40
mV
Protection Threshold
VCOMP = 1.45V
VOVP
Falling threshold measured at FB pin with
Lower Output-Over Voltage
respect to FB pin,
26
mv
Protection Threshold
VCOMP = 1.45V
VGS-on
On State Drive voltage at VG pin (5)
VIN = 5V, ISEN = 5V, IG = 0A
3.8
4.9
V
Vin = 5V, ISEN = VIN – 200mV
VGS-off
Off State Drive voltage at VG pin(6)
5
mV
IG = 0A
VIN = 5V, ISEN = 5V
IG
Maximum Drive current at VG pin
20
µA
VG = VIN
Gm
Error Amplifier Transconductance
VCOM = 1.4 V, ICOMP = ±50µA
340
522
900
µA/V
Error Amplifier Open Loop Voltage
AVOL
VCOM = 1.2 V to 1.8V, ICOMP = 0A
190
313
450
V/V
Gain
Error Amplifier Open Loop Output
RO
600
k
Ω
Resistance (7)
SOURCING:
27
66
115
µA
VCOMP = 1.4V, VFB = 1.1V
Error Amplifier Output Current
IEAO
Swings
SINKING:
49
68
125
µA
VCOMP = 1.4V, VFB = 1.4V
(3)
See sections on operational modes and short circuit protection.
(4)
The bias current flowing through this pin is compensated and can flow either into or out-of this pin.
(5)
This is the gate-to-source voltage drive of Q2, when the controller turns on this FET.
(6)
This voltage is measured from the VG pin to AGND, when the controller fully turns off Q2.
(7)
This parameter is calculated from the error amplified Gm and AVOL, and is not tested.
4
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