LT1512
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V
C
1
FB 2
I
FB
3
S/S 4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
V
SW
GND
GND S
V
IN
Input Voltage .......................................................... 30V
Switch Voltage ........................................................ 40V
S/S Pin Voltage ....................................................... 30V
FB Pin Voltage (Transient, 10ms) .........................
鹵10V
V
FB
Pin Current .................................................... 10mA
I
FB
Pin Voltage (Transient, 10ms) .........................
鹵10V
Storage Temperature Range ................ 鈥?65擄C to 150擄C
Ambient Temperature Range
LT1512C (Note 3) .................................... 0擄C to 70擄C
LT1512I .............................................. 鈥?40擄C to 85擄C
Operating Junction Temperature Range
LT1512C (Note 3) ............................ 鈥?20擄C to 125擄C
LT1512I ............................................ 鈥?40擄C to 125擄C
Short Circuit ......................................... 0擄C to 150擄C
Lead Temperature (Soldering, 10 sec)................. 300擄C
ORDER PART
NUMBER
LT1512CN8
LT1512CS8
LT1512IN8
LT1512IS8
S8 PART
MARKING
1512
1512I
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 125擄C,
胃
JA
= 100擄C/ W (N)
T
JMAX
= 125擄C,
胃
JA
= 130擄C/ W (S)
NOTE: CONTACT FACTORY CONCERNING 16-LEAD
FUSED-LEAD GN PACKAGE WITH LOWER THERMAL
RESISTANCE
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
V
IN
= 5V, V
C
= 0.6V, V
FB
= V
REF
, I
FB
= 0V, V
SW
and S/S pins open, unless otherwise noted.
SYMBOL
V
REF
PARAMETER
V
FB
Reference Voltage
FB Input Current
FB Reference Voltage Line Regulation
V
IREF
I
FB
Reference Voltage
I
FB
Input Current
I
FB
Reference Voltage Line Regulation
g
m
Error Amplifier Transconductance
Error Amplifier Source Current
Error Amplifier Sink Current
Error Amplifier Clamp Voltage
A
V
f
Error Amplifier Voltage Gain
V
C
Pin Threshold
Switching Frequency
Duty Cycle = 0%
2.7V
鈮?/div>
V
IN
鈮?/div>
25V
0擄C
鈮?/div>
T
J
鈮?/div>
125擄C
鈥?40擄C
鈮?/div>
T
J
< 0擄C (LT1512I)
q
q
CONDITIONS
Measured at FB Pin
V
C
= 0.8V
V
FB
= V
REF
q
q
MIN
1.233
1.228
TYP
1.245
1.245
300
MAX
1.257
1.262
550
600
0.03
鈥?93
鈥?90
35
0.05
1900
2300
350
2400
2.30
0.52
1.25
550
580
580
260
UNITS
V
V
nA
nA
%/V
mV
mV
碌A(chǔ)
%/V
碌mho
碌mho
碌A(chǔ)
碌A(chǔ)
V
V
V/ V
V
kHz
kHz
kHz
%
ns
V
V
2.7V
鈮?/div>
V
IN
鈮?/div>
25V, V
C
= 0.8V
Measured at I
FB
Pin
V
FB
= 0V, V
C
= 0.8V
V
IFB
= V
IREF
(Note 2)
2.7V
鈮?/div>
V
IN
鈮?/div>
25V, V
C
= 0.8V
鈭咺
C
=
鹵25碌A(chǔ)
q
q
q
q
q
0.01
鈥?107
鈥?10
10
1100
700
120
1.70
0.25
0.8
450
430
400
88
40
35
鈥?100
鈥?100
25
0.01
1500
200
1400
1.95
0.40
500
1
500
500
95
130
47
V
FB
= V
REF
鈥?150mV, V
C
= 1.5V
V
FB
= V
REF
+ 150mV, V
C
= 1.5V
High Clamp, V
FB
= 1V
Low Clamp, V
FB
= 1.5V
q
q
Maximum Switch Duty Cycle
Switch Current Limit Blanking Time
BV
Output Switch Breakdown Voltage
0擄C
鈮?/div>
T
J
鈮?/div>
125擄C
鈥?40擄C
鈮?/div>
T
J
< 20擄C (LT1512I)
q
2
U
W
U
U
W W
W
LT1512I相關(guān)型號(hào)PDF文件下載
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