LT1107_15 Datasheet, PDF (2/16 Pages) Linear Technology – Micropower DC/DC Converter Adjustable and Fixed 5V, 12V

LT1107
ABSOLUTE AXI U RATI GS (Note 1)
Supply Voltage (V_IN) ............................................... 36V
SW1 Pin Voltage (V_SW1) ......................................... 50V
SW2 Pin Voltage (V_SW2) ............................ – 0.5V to V_IN
Feedback Pin Voltage (LT1107) ................................ 5V
Sense Pin Voltage (LT1107-5, LT1107-12) ............ 36V
Maximum Power Dissipation ............................ 500mW
Set Pin Voltage ...................................................... 5.5V
Maximum Switch Current ...................................... 1.5A
Operating Temperature Range
LT1107C ................................................ 0°C to 70°C
LT1107I ............................................ –45°C to 85°C
LT1107M(OBSOLETE) ............... – 55°C to 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER I FOR ATIO
I_LIM 1
V_IN 2
SW1 3
SW2 4
TOP VIEW
8 FB (SENSE)*
7 SET
6 AO
5 GND
ORDER PART
NUMBER
LT1107CN8
LT1107CN8-5
LT1107CN8-12
N8 PACKAGE
8-LEAD PLASTIC DIP
* FIXED VERSIONS
T_JMAX = 90°C, θ_JA = 130°C/W (N)
J8 PACKAGE
8-LEAD CERAMIC DIP
T_JMAX = 150°C, θ_JA = 120°C/W (J)
LT1107MJ8
LT1107MJ8-5
LT1107MJ8-12
OBSOLETE PACKAGE
Consider the N8 Package for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TOP VIEW
I_LIM 1
V_IN 2
SW1 ₃
SW2 ₄
8 FB(SENSE)*
7 SET
6 AO
5 GND
S8 PACKAGE
8-LEAD PLASTIC SO
*FIXED VERSIONS
T_JMAX = 90°C, θ_JA = 150°C/W
ORDER PART
NUMBER
LT1107CS8
LT1107CS8-5
LT1107CS8-12
LT1107IS8
S8 PART MARKING
1107
11075
110712
1107I
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, V_IN = 3V, military or commercial version, T_A = 25°C, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
UNITS
I_Q
Quiescent Current
Switch OFF
Quiescent Current, Step-Up Mode Configuration
No Load
LT1107-5
LT1107-12
320 450
µA
360
µA
550
µA
V_IN
Input Voltage
Step-Up Mode
Step-Down Mode
q
2
q
12.6
V
30.0
V
Comparator Trip Point Voltage
LT1107 (Note 2)
q 1.2 1.25 1.3
V
V_OUT
Output Sense Voltage
LT1107-5 (Note 3)
LT1107-12 (Note 3)
q 4.75 5
5.25
V
q 11.40 12 12.60
V
Comparator Hysteresis
LT1107
q
8 12.5
mV
Output Hysteresis
LT1107-5
LT1107-12
q
32
50
mV
q
75 120
mV
f_OSC
Oscillator Frequency
Duty Cycle, Step-Up Mode
Full Load
50
63
77
kHz
64
70
76
%
t_ON
Switch ON Time, Step-Up Mode
I_LIM Tied to V_IN
8.8
11 12.7
µs
1107fa
2