參數(shù)資料
型號(hào): LT1072
廠商: Texas Instruments, Inc.
元件分類(lèi): 基準(zhǔn)電壓源/電流源
英文描述: 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
中文描述: 射頻放大器
文件頁(yè)數(shù): 3/17頁(yè)
文件大小: 354K
代理商: LT1072
LT1072, LT1072HV
1.25-A HIGH-EFFICIENCY SWITCHING REGULATORS
SLVS071A – NOVEMBER 1989 – REVISED AUGUST 1995
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating virtual junction temperature range (unless otherwise
noted)
Supply voltage, V
I(IN)
(see Note 1):
LT1072
LT1072HV
40 V
60 V
65 V
75 V
±
15 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LT1072HV
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Feedback input voltage, V
(FB)
(transient, 1 ms)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total dissipation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating virtual-junction temperature range, T
J
:
Switch output voltage: LT1072
See Dissipation Rating Tables 1 and 2
LT1072C, LT1072HVC
. . . . . . . . . . . . . . . .
LT1072I, LT1072HVI
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
0
°
C to 125
°
C
–40
°
C to 125
°
C
–65
°
C to 150
°
C
Storage temperature range, T
stg
260
°
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: Minimum switch-on time for the LT1072 in current limit is
0.7
μ
s. This limits the maximum input voltage during short-circuit conditions,
in the step-down and inverting modes only, to
40 V. Normal (unshorted) conditions are not affected. If the LT1072 is being operated
in the step-down or inverting mode at high input voltages and short-circuit conditions are expected, a resistor must be placed in series
with the inductor.
DISSIPATION RATING TABLE 1 – FREE-AIR TEMPERATURE
DISSIPATION RATING TABLE 2 – CASE TEMPERATURE
PACKAGE
TA
25
°
C
POWER
RATING
DERATING
FACTOR
ABOVE TA = 25
°
C
16 mW/
°
C
16 mW/
°
C
8 mW/
°
C
TA = 125
°
C
POWER
RATING
PACKAGE
TC
25
°
C
POWER
RATING
DERATING
FACTOR
ABOVE TC = 70
°
C
250 mW/
°
C
250 mW/
°
C
TC = 125
°
C
POWER
RATING
KC
2000 mW
400 mW
KC
20 W
6.25 W
KV
2000 mW
400 mW
KV
20 W
6.25 W
P
1000 mW
200 mW
recommended operating conditions
MIN
MAX
UNIT
Input Voltage VI(IN)
Input Voltage, VI(IN)
LT1072C, LT1072I
3
40
V
LT1072HVC, LT1072HVI
3
60
Virtual-junction temperature TJ
Virtual-junction temperature, TJ
LT1072C, LT1072HVC
LT1072I, LT1072HVI
0
100
125
°
C
–40
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