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参数资料
| 型号： | LT1072CP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 1.25 A SWITCHING REGULATOR, 47 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封装： | PLASTIC, DIP-8 |
| 文件页数： | 14/19页 |
| 文件大小： | 294K |
| 代理商： | LT1072CP |
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, VIN = 15 V, VFB = Vref with SW
output open (unless otherwise noted)
reference section
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP§
MAX
UNIT
V f
Output voltage
Measured at FB input
V(C) 06V
25
°C
1.224
1.244
1.264
V
Vref
Output voltage
Measured at FB input,
V(C) = 0.6 V
Full range
1.214
1.274
V
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
MIN
TYP§
MAX
UNIT
I(FB)
Feedback input current
V(FB) =V f
25
°C
350
750
nA
I(FB)
Feedback input current
V(FB) = Vref
Full range
1100
nA
Transconductance
I(C) = ±25 A
25
°C
3000
4400
6000
mho
Transconductance
I(C) = ±25 A
Full range
2400
7000
mho
Source current
V(C) =1 5V
V(FB) =0 8V
25
°C
150
200
350
A
Source current
V(C) = 1.5 V,
V(FB) = 0.8 V
Full range
120
400
A
Sink current
V(C) =1 5V
V(FB) =1 5V
25
°C
150
200
350
A
Sink current
V(C) = 1.5 V,
V(FB) = 1.5 V
Full range
120
400
A
VO(C)
Output voltage
High state,
V(FB) = 1 V
25
°C
1.8
2.3
V
VO(C)
Output voltage
Low state,
V(FB) = 1.5 V
25
°C
0.25
0.38
0.52
V
AV
Voltage amplication
V(C) = 0.7 V to 1.4 V
Full range
500
800
2000
V/V
V(TO)(C) Control threshold voltage
Duty cycle = 0
25
°C
0.8
0.9
1.08
V
V(TO)(C) Control threshold voltage
Duty cycle = 0
Full range
0.6
1.25
V
flyback amplifier section
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP§
MAX
UNIT
VT(FB)
Flyback threshold
voltage
I(FB) = 50 A
25
°C
0.4
0.45
0.54
V
Flyback threshold
I(FB) =50 A
I(C) = 1 to+1A
V(C) =0 6V
25
°C
15
16.3
17.6
V
y
voltage
I(FB) = 50 A,
I(C) = -1 to + 1A,
V(C) = 0.6 V
Full range
14
18
V
Change in flyback
reference
I(FB) = 0.05 to 1 mA,
I(C) = – 1 to + 1 A, V(C) = 0.6 V
25
°C
4.5
6.8
8.5
V
Flyback reference input
regulation
I(FB) = 50 A,
I(C) = – 1 to + 1 A,
V(IN) = 3 V to MAX,
V(C) = 0.6 V
25
°C
0.01
0.03
%/V
Transconductance
I(FB) = 50 A,
I(C) ≤ ±10 A
25
°C
150
300
500
mho
Sink or source current
V(C) = 1.5 V,
I(FB)= 50 A,
Source
Full range
15
32
50
A
Sink or source current
V(SW) = VZ + V(IN) ± 1 V
Sink
Full range
25
40
70
A
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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