LT1738EG Linear Technology, LT1738EG Datasheet - Page 8
![IC DC/DC CONTRLR LOW NOIS 20SSOP](/photos/6/69/66947/lt1683eg_pbf_sml.jpg)
LT1738EG
Manufacturer Part Number
LT1738EG
Description
IC DC/DC CONTRLR LOW NOIS 20SSOP
Manufacturer
Linear Technology
Type
Step-Up (Boost), Cuk, Flybackr
Datasheet
1.LT1738EGPBF.pdf
(20 pages)
Specifications of LT1738EG
Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5 ~ 100 V
Frequency - Switching
20kHz ~ 250kHz
Voltage - Input
2.55 ~ 20 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
20-SSOP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Output
-
Power - Output
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1738EG#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
PI FU CTIO S
LT1738
V
compensation and current limiting. It is the output of the
error amplifier and the input of the current comparator.
Loop frequency compensation can be performed with an
RC network connected from the V
voltage on V
The normal range of voltage on this pin is 0.25V to 1.27V.
However, during slope compensation the upper clamp
voltage is allowed to increase with the compensation.
During a short-circuit fault the V
ground.
BLOCK DIAGRA
8
C
U
(Pin 12): The compensation pin is used for frequency
U
NFB
C
SS
FB
V
R
C
C
T
T
is proportional to the switch peak current.
10
12
13
9
8
7
100k
U
OSCILLATOR
W
SYNC
–
+
NEGATIVE
FEEDBACK
6
AMP
50k
C
pin will be discharged to
1.25V
C
pin to ground. The
+
+
–
S
R
ERROR
SHDN
AMP
FF
REGULATOR
14
COMP
Q
V
–
+
17
IN
V
REG
Figure 1a. Typical Test Circuitry
TEST CIRCUITS
V5
GATE
5
CAP
TO
DRIVERS
5pF
2
R
20mA
15
ZVN3306A
CSL
CONTROL
IN5819
SLEW
GND
11
10
R
16
1738 F01a
VSL
SUB
+
–
SENSE
AMP
+
–
Figure 1b. Test Circuit for Slew
GATE
CAP
CS
1738 BD
5pF
20
3
2
1
4
0.1
GCL
CAP
GATE
PGND
CS
0.9A
Si4450DY
IN5819
10
1738 F01b
+
–
1738fa