LT1247 Linear Technology, LT1247 Datasheet - Page 3

• Manufacturer Part Number: LT1247
• Description: 1MHz Off-Line Current Mode PWM and DC/DC Converter
• Manufacturer: Linear Technology

PARAMETER
Error Amplifier Section
Output Voltage High Level
Output Voltage Low Level
Current Sense Section
Gain
Maximum Current Sense Input Threshold
Power Supply Rejection Ratio
Input Bias Current
Delay to Output
Blanking Time
Blanking Override Voltage
Output Section
Output Low Level
Output High Level
Rise Time
Fall Time
Output Clamp Voltage
Undervoltage Lockout
Start-Up Threshold
Minimum Operating Voltage
Hysteresis
PWM
Maximum Duty Cycle
Minimum Duty Cycle
Total Device
Start-Up Current
Operating Current
ELECTRICAL C
The
temperature range.
Note 1: Unless otherwise specified, V
denotes those specifications which apply over the full operating
HARA TERISTICS
CC
= 15V, R
C
CONDITIONS
V
V
V
I
I
I
I
C
C
I
LT1246
LT1247
LT1246
LT1247
LT1246
LT1247
T
T
OUT
OUT
OUT
OUT
O
J
J
PIN 2
PIN 2
PIN 3
L
L
= 1mA
= 25 C
= 25 C
= 1nF, T
= 1nF, T
T
= 20mA
= 200mA
= 20mA
= 200mA
= 10k, C
= 2.3V, R
= 2.7V, R
< 1.1V
J
J
= 25 C
= 25 C
T
L
L
= 3.3nF.
= 15k to GND
= 15k to Pin 8
(Notes 1, 2)
Note 2: Low duty cycle pulse techniques are used during test to maintain
junction temperature close to ambient.
11.75
2.85
0.90
12.0
MIN
7.8
9.0
7.0
5.5
0.4
15
94
5
3.00
1.00
0.25
0.75
TYP
170
5.6
0.2
1.5
8.4
7.6
6.0
0.8
70
–1
30
60
30
20
18
16
10
13
0
LT1246/LT1247
MAX
3.15
1.10
–10
100
250
1.1
0.4
2.2
9.0
8.2
70
60
19
17
11
20
UNITS
3
V/V
mA
dB
ns
ns
ns
ns
%
%
V
V
V
A
V
V
V
V
V
V
V
V
V
V
V
V
A