LT1512C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LT1512C' PDF : 12 Pages View PDF
LT1512
ABSOLUTE AXI U RATI GS
Input Voltage .......................................................... 30V
Switch Voltage ........................................................ 40V
S/S Pin Voltage ....................................................... 30V
FB Pin Voltage (Transient, 10ms) ......................... ±10V
VFB Pin Current .................................................... 10mA
IFB Pin Voltage (Transient, 10ms) ......................... ±10V
Storage Temperature Range ................ – 65°C to 150°C
Ambient Temperature Range
LT1512C (Note 3) .................................... 0°C to 70°C
LT1512I .............................................. – 40°C to 85°C
Operating Junction Temperature Range
LT1512C (Note 3) ............................ – 20°C to 125°C
LT1512I ............................................ – 40°C to 125°C
Short Circuit ......................................... 0°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VC 1
FB 2
IFB 3
S/S 4
8 VSW
7 GND
6 GND S
5 VIN
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 125°C, θJA = 100°C/ W (N)
TJMAX = 125°C, θJA = 130°C/ W (S)
NOTE: CONTACT FACTORY CONCERNING 16-LEAD
FUSED-LEAD GN PACKAGE WITH LOWER THERMAL
RESISTANCE
ORDER PART
NUMBER
LT1512CN8
LT1512CS8
LT1512IN8
LT1512IS8
S8 PART
MARKING
1512
1512I
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
VIN = 5V, VC = 0.6V, VFB = VREF, IFB = 0V, VSW and S/S pins open, unless otherwise noted.
SYMBOL PARAMETER
VREF
VFB Reference Voltage
FB Input Current
CONDITIONS
Measured at FB Pin
VC = 0.8V
VFB = VREF
FB Reference Voltage Line Regulation
VIREF
IFB Reference Voltage
IFB Input Current
IFB Reference Voltage Line Regulation
gm
Error Amplifier Transconductance
2.7V ≤ VIN ≤ 25V, VC = 0.8V
Measured at IFB Pin
VFB = 0V, VC = 0.8V
VIFB = VIREF (Note 2)
2.7V ≤ VIN ≤ 25V, VC = 0.8V
∆IC = ±25µA
Error Amplifier Source Current
Error Amplifier Sink Current
Error Amplifier Clamp Voltage
AV
Error Amplifier Voltage Gain
VC Pin Threshold
f
Switching Frequency
Maximum Switch Duty Cycle
Switch Current Limit Blanking Time
BV
Output Switch Breakdown Voltage
VFB = VREF – 150mV, VC = 1.5V
VFB = VREF + 150mV, VC = 1.5V
High Clamp, VFB = 1V
Low Clamp, VFB = 1.5V
Duty Cycle = 0%
2.7V ≤ VIN ≤ 25V
0°C ≤ TJ ≤ 125°C
– 40°C ≤ TJ < 0°C (LT1512I)
0°C ≤ TJ ≤ 125°C
– 40°C ≤ TJ < 20°C (LT1512I)
MIN
1.233
q 1.228
q
q
– 107
q –110
q 10
q
1100
q 700
q 120
q
1.70
0.25
0.8
450
q 430
400
q 88
q 40
35
TYP
1.245
1.245
300
0.01
– 100
– 100
25
0.01
1500
200
1400
1.95
0.40
500
1
500
500
95
130
47
MAX
1.257
1.262
550
600
0.03
– 93
– 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
µA
%/V
µmho
µmho
µA
µA
V
V
V/ V
V
kHz
kHz
kHz
%
ns
V
V
2
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