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LM5642XMT bảng dữ liệu(PDF) 5 Page - Texas Instruments

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LM5642XMT bảng dữ liệu(HTML) 5 Page - Texas Instruments

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LM5642, LM5642X
www.ti.com
SNVS219K – JUNE 2003 – REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, VIN = 28V, GND = PGND = 0V, VLIN5 = VDD1 = VDD2. Limits appearing in boldface type apply
over the specified operating junction temperature range, (-40°C to +125°C, if not otherwise specified). Specifications
appearing in plain type are measured using low duty cycle pulse testing with TA = 25°C
(1), (2). Min/Max limits are specified by
design, test, or statistical analysis.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
System
ΔVOUT/VOUT
Load Regulation
VIN = 28V, Vcompx = 0.5V to 1.5V
0.04
%
Line Regulation
5.5V
≤ VIN ≤ 36V, Vcompx =1.25V
0.04
%
VFB1_FB2
Feedback Voltage
5.5V
≤ VIN ≤ 36V
1.2154
1.2364
1.2574
V
-20°C to 85°C
1.2179
1.2364
1.2549
IVIN
Input Supply Current
VON_SSx > 2V
1.1
2.0
mA
5.5V
≤ VIN ≤ 36V
Shutdown (3)
50
110
µA
VON_SS1 = VON_SS2= 0V
VLIN5
VLIN5 Output Voltage
IVLIN5 = 0 to 25mA,
4.70
5
5.30
V
5.5V
≤ VIN ≤ 36V
VCLos
Current Limit Comparator
VIN = 6V
±2
±7.0
mV
Offset (VILIMX
−VRSNSX)
ICL
Current Limit Sink Current
8.4
9.9
11.4
µA
Iss_SC1,
Soft-Start Source Current
VON_ss1 = VON_ss2 = 1.5V (on)
0.5
2.4
5.0
µA
Iss_SC2
Iss_SK1,
Soft-Start Sink Current
VON_ss1 = VON_ss2 = 1.5V
2
5.5
10
µA
Iss_SK2
VON_SS1,
Soft-Start On Threshold
0.7
1.12
1.4
V
VON_SS2
VSSTO
Soft-Start Timeout
(4)
3.4
V
Threshold
Isc_uvdelay
UV_DELAY Source Current
UV-DELAY = 2V
2
5
9
µA
Isk_uvdelay
UV_DELAY Sink Current
UV-DELAY = 0.4V
0.2
0.48
1.2
mA
VUVDelay
UV_DELAY Threshold
2.3
V
Voltage
VUVP
FB1, FB2, Under Voltage
As a percentage of nominal output voltage
75
80.7
86
%
Protection Latch Threshold
(falling edge)
Hysteresis
3.7
%
VOVP
VOUT Overvoltage
As a percentage measured at VFB1, VFB2
107
114
122
%
Shutdown Latch Threshold
Swx_R
SW1, SW2 ON-Resistance
VSW1 = VSW2 = 0.4V
420
487
560
(1)
A typical is the center of characterization data measured with low duty cycle pulse tsting at TA = 25°C. Typicals are not ensured.
(2)
All limits are specified. All electrical characteristics having room-temperature limits are tested during production with TA = TJ = 25°C. All
hot and cold limits are specified by correlating the electrical characteristics to process and temperature variations and applying statistical
process control.
(3)
Both switching controllers are off. The linear regulator VLIN5 remains on.
(4)
When SS1 and SS2 pins are charged above this voltage and either of the output voltages at Vout1 or Vout2 is still below the regulation
limit, the under voltage protection feature is initialized.
Copyright © 2003–2013, Texas Instruments Incorporated
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