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參數(shù)資料
| 型號： | LT1072 |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 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 |
| 文件頁數(shù)： | 4/17頁 |
| 文件大小： | 354K |
| 代理商： | LT1072 |
LT1072, LT1072HV
1.25-A HIGH-EFFICIENCY SWITCHING REGULATORS
SLVS071A – NOVEMBER 1989 – REVISED AUGUST 1995
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at specified virtual junction temperature, V
IN
= 15 V, V
FB
= V
ref
with SW
output open (unless otherwise noted)
reference section
PARAMETER
TEST CONDITIONS
TJ
25
°
C
Full range
MIN
1.224
TYP§
1.244
MAX
1.264
UNIT
Vref
Output voltage
Measured at FB input,
V(C) = 0.6 V
0 6 V
V
1.214
1.274
Input regulation
V(IN) = 3 V to MAX,
V(C) = 0.6 V
Full range
0.03
%/V
error amplifier section
PARAMETER
TEST CONDITIONS
TJ
25
°
C
Full range
25
°
C
Full range
25
°
C
Full range
25
°
C
Full range
MIN
TYP§
MAX
UNIT
I(FB)
Feedback input current
V(FB)= Vref
V(FB) = Vref
350
750
nA
1100
Transconductance
I(C)=
±
μ
I(C) =
25
A
3000
4400
6000
μ
mho
2400
7000
Source current
V(C)= 1 5 V
V(C) = 1.5 V,
V(FB)= 0 8 V
V(FB) = 0.8 V
150
200
350
μ
A
120
400
Sink current
V(C)= 1 5 V
V(C) = 1.5 V,
V(FB)= 1 5 V
V(FB) = 1.5 V
150
200
350
μ
A
120
400
VO(C)
Output voltage
High state,
V(FB) = 1 V
V(FB) = 1.5 V
25
°
C
1.8
2.3
V
Low state,
0.25
0.38
0.52
AV
Voltage amplication
V(C) = 0.7 V to 1.4 V
Full range
25
°
C
Full range
500
800
2000
V/V
V(TO)(C)
Control threshold voltage
Duty cycle = 0
0.8
0.6
0.9
1.08
1.25
V
flyback amplifier section
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP§
MAX
UNIT
VT(FB)
Flyback threshold
voltage
I(FB) = 50
μ
A
25
°
C
0.4
0.45
0.54
V
Flyback threshold
voltage
μ
I(FB)= 50
A
I(C)= -1 to + 1
I(C) = -1 to + 1
μ
A
V(C)= 0 6 V
V(C) = 0.6 V
25
°
C
Full range
15
16.3
17.6
V
14
18
Change in flyback
reference
I(FB) = 0.05 to 1 mA,
I(C) = –1 to +1
μ
A,
V(C) = 0.6 V
25
°
C
4.5
6.8
8.5
V
Flyback reference input
regulation
I(FB) = 50
μ
A,
I(C) = –1 to +1
μ
A,
I(FB) = 50
μ
A,
V(C) = 1.5 V,
V(SW) = VZ + V(IN)
±
1 V
V(IN) = 3 V to MAX,
V(C) = 0.6 V
I(C)
≤
±
10
μ
A
I(FB)= 50
μ
A,
25
°
C
0.01
0.03
%/V
Transconductance
25
°
C
150
300
500
μ
mho
Sink or source current
Source
Full range
15
32
50
μ
A
Sink
25
40
70
For conditions shown as MIN or MAX, use the appropriate value specified under the recommended operating conditions.
Full range virtual junction temperature is 0
°
C to 100
°
C for LT1072C and LT1072HVC and –40
°
C to 125
°
C for LT1072I and LT1072HVI.
§All typical values are TA = 25
°
C.
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