LT1071_15 Datasheet, PDF (2/12 Pages) Linear Technology – 5A and 2.5A High Efficiency Switching Regulators

LT1070/LT1071
ABSOLUTE MAXIMUM RATINGS (Note 1)
Supply Voltage
Operating Junction Temperature Range
LT1070/LT1071 (Note 2) .................................... 40V
LT1070HV/LT1071HV (Note 2) .......................... 60V
Switch Output Voltage
LT1070/LT1071 .................................................. 65V
LT1070HV/LT1071HV ........................................ 75V
Feedback Pin Voltage (Transient, 1ms) ................ ±15V
Commercial (Operating) ....................... 0°C to 100°C
Commercial (Short Circuit)................... 0°C to 125°C
Industrial ......................................... – 40°C to 125°C
Military (OBSOLETE) ................. – 55°C to 150°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER INFORMATION
BOTTOM VIEW
V_SW
V_C
ORDER PART
NUMBER
1
2
4
3
LT1070CK
CASE
IS GND
LT1070HVCK
LT1070HVMK
V_IN
FB
K PACKAGE
4-LEAD TO-3 METAL CAN
LT1070IK
LT1070MK
LT1071CK
T_JMAX = 100°C, θ_JA = 35°C/ W, Q_JC = 2°C (LT1070C, I)
T_JMAX = 150°C, θ_JA = 35°C/ W, Q_JC = 2°C (LT1070M)
T_JMAX = 100°C, θ_JA = 35°C/ W, Q_JC = 4°C (LT1071C, I)
T_JMAX = 150°C, θ_JA = 35°C/ W, Q_JC = 4°C (LT1071M)
LT1071HVCK
LT1071HVMK
LT1071MK
OBSOLETE PACKAGE
Consider the T5 Package for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
FRONT VIEW
5
V_IN
4
V_SW
3
GND
2
FB
1
V_C
T PACKAGE
5-LEAD PLASTIC TO-220
T_JMAX = 100°C, θ_JA = 75°C/ W, Q_JC = 2°C (LT1070C, I)
T_JMAX = 100°C, θ_JA = 75°C/ W, Q_JC = 4°C (LT1071C)
ORDER PART
NUMBER
LT1070CT
LT1070HVCT
LT1070HVIT
LT1070IT
LT1071CT
LT1071HVCT
LT1071HVIT
LT1071IT
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T_A = 25°C. V_IN = 15V, V_C = 0.5V, V_FB = V_REF, output pin open unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
V_REF
Reference Voltage
Measured at Feedback Pin, V_C = 0.8V
1.224 1.244 1.264
V
q 1.214 1.244 1.274
V
I_B
Feedback Input Current
V_FB = V_REF
350 750
nA
q
1100
nA
g_m
Error Amplifier Transconductance
∆I_C = ±25µA
3000 4400 6000
q 2400
7000
µmho
µmho
Error Amplifier Source or Sink Current
V_C = 1.5V
150 200 350
µA
q 120
400
µA
Error Amplifier Clamp Voltage
Hi Clamp, V_FB = 1V
Lo Clamp, V_FB = 1.5V
Reference Voltage Line Regulation
3V ≤ V_IN ≤ V_MAX, V_C = 0.8V
A_V
Error Amplifier Voltage Gain
0.9V ≤ V_C ≤ 1.4V
Minimum Input Voltage
1.80
2.30
V
0.25 0.38 0.52
V
q
0.03
%/V
500 800
V/V
q
2.6
3.0
V
I_Q
Supply Current
Control Pin Threshold
3V ≤ V_IN ≤ V_MAX, V_C = 0.6V
Duty Cycle = 0
6
9
mA
0.8
0.9
1.08
V
q 0.6
1.25
V
Normal/Flyback Threshold on Feedback Pin
0.4
0.45 0.54
V
10701fe
2