LT1952IGN#PBF Linear Technology, LT1952IGN#PBF Datasheet - Page 3

• Manufacturer Part Number: LT1952IGN#PBF
• Description: IC CTLR PWM SGL SWITCH 16-SSOP
• Manufacturer: Linear Technology

Specifications of LT1952IGN#PBF

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 560kHz
• Duty Cycle: 90%
• Voltage - Supply: 9.25 V ~ 25 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SSOP
• Frequency-max: 560kHz
• Number Of Pwm Outputs: 1
• On/off Pin: No
• Adjustable Output: No
• Topology: Flyback/Forward
• Switching Freq: 80 TO 560kHz
• Operating Supply Voltage (max): 25V
• Synchronous Pin: Yes
• Rise Time: 50ns
• Fall Time: 30ns
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 16
• Package Type: SSOP N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifi cations are at T
= 0.1μF , SD_V
PARAMETER
V
V
V
V
V
V
V
Output Voltage
Line Regulation
Load Regulation
OSCILLATOR
Frequency: f
Minimum Programmable f
Maximum Programmable f
SYNC Input Resistance
SYNC Switching Threshold
SYNC Frequency/f
f
V
ERROR AMPLIFIER
FB Reference Voltage
FB Input Bias Current
Open Loop Voltage Gain
Unity Gain Bandwidth
COMP Source Current
COMP Sink Current
COMP Current (Disabled)
COMP High Level: V
COMP Active Threshold
COMP Low Level: V
CURRENT SENSE
I
I
I
OC Threshold
OC Input Current
Default Blanking Time
Adjustable Blanking Time
V
OSC
SENSE
SENSE
SENSE
IN ON
IN OFF
IN HYSTERESIS
IN ON
IN OFF
IN HYSTERESIS
REF
ROSC
BLANK
Line Reg
(LT1952)
(LT1952-1)
Maximum Threshold
Input Current (Duty Cycle = 0%)
Input Current (Duty Cycle = 80%)
(LT1952)
(LT1952-1)
OSC
(LT1952-1)
(LT1952)
SEC
OSC
= 2V, BLANK = 121k, DELAY = 121k, I
OL
OH
OSC
OSC
CONDITIONS
I(V
I(V
0μA < I(V
R
R
R
FB = 1V
FB = 1V (Note 7)
FB = 1V, R
SS_MAXDC = 1.84V
R
10V < V
FB = FB Reference Voltage
V
(Note 6)
FB = 1V, COMP = 1.6V
COMP = 1.6V
FB = V
FB = 1V, I
FB = 1V, SOUT Duty Cycle > 0 %
I
COMP = 2.5V, FB = 1V
COMP = 2.5V, FB = 1V (Note 4)
COMP = 2.5V, FB = 1V (Note 4)
COMP = 2.5V, FB = 1V
(OC = 100mV)
COMP = 2.5V, FB = 1V, R
COMP = 2.5V, FB = 1V, R
(COMP)
OL
OSC
OSC
OSC
OSC
A
REF
REF
= 25°C. COMP = open, FB = 1.4V, R
SENSE
+ 0.2V < COMP < V
= 178k, FB = 1V, SS_MAXDC = 1.84V
= 365k, FB = 1V
= 64.9k, COMP = 2.5V, SD_V
Pin voltage
) = 0μA
) = 0μA, 10V < V
REF
= 250μA
IN
REF
, COMP = 1.6V
(COMP)
< 25V, V
The
= 0V, OC = 0V, OUT = 1nF , V
OSC
) < 2.5mA
= 178k; 10V < V
l
= –250μA
denotes the specifi cations which apply over the full operating
OL
+ 0.2V < COMP < V
IN
OH
< 25V
BLANK
BLANK
– 0.2
IN
= 40k (Note 10)
= 120k
< 25V,
SEC
= 2.64V
IN
OH
OSC
= 15V, SOUT = open, unless otherwise specifi ed.
– 0.2
= 178k, SYNC = 0V, SS_MAXDC = V
l
l
l
l
l
l
l
l
l
LT1952/LT1952-1
2.425
1.201
3.75
0.95
MIN
165
440
197
2.7
0.7
–4
80
65
18
98
4
14.25
1.226
8.75
7.75
1.25
1.25
0.05
0.15
TYP
200
100
500
–75
220
–35
107
–50
180
540
5.5
6.5
2.5
1.5
3.2
0.8
–9
–8
18
85
10
23
1
1
1
3
1
15.75
2.575
1.250
–200
–100
MAX
9.25
6.75
8.13
6.82
0.33
240
120
560
243
116
2.2
1.5
0.4
10
10
28
REF
, V
UNITS
19521fd
3
REF
MHz
%/V
kHz
kHz
kHz
mV
mV
mA
mA
mV
mV
kΩ
nA
dB
μA
μA
μA
nA
ns
ns
V
V
V
V
V
V
V
V
V
V
V
V
V
V