LT1738EG#TR Linear Technology, LT1738EG#TR Datasheet - Page 3

• Manufacturer Part Number: LT1738EG#TR
• Description: IC DC/DC CONTRLR LOW NOIS 20SSOP
• Manufacturer: Linear Technology
• Type: Step-Up (Boost), Cuk, Flybackr

Specifications of LT1738EG#TR

• 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: -
• Other names: LT1738EGTR

temperature range, otherwise specifications are at T
other pins open unless otherwise noted.
SYMBOL
Oscillator and Sync
f
f
V
R
Gate Drive
DC
VG
VG
IG
IG
V
Current Sense
t
V
V
Slew Control for the Following Slew Tests See Test Circuit in Figure 1b
V
V
VI
VI
Supply and Protection
V
I
V
I
V5
IV5
Note 1: Absolute Maximum Ratings are those values beyond which the
life of a device may be impaired.
Note 2: Supply current specification includes loads on each gate as in
Figure 1a. Actual supply currents vary with operating frequency, operating
voltages, V5 load, slew rates and type of external FET.
Note 3: The LT1738E is guaranteed to meet performance specifications
from 0 C to 70 C. Specifications from –40 C to 125 C are assured by
ELECTRICAL CHARACTERISTICS
MAX
SYNC
IBL
VIN
SHDN
SYNC
INUVLO
SENSE
SENSEF
SLEWR
SLEWF
INMIN
SHDN
SYNC
V
SO
SK
SLEWR
SLEWF
MAX
ON
OFF
SHDN
SC
PARAMETER
Max Switch Frequency
Synchronization Frequency Range
SYNC Pin Input Threshold
SYNC Pin Input Resistance
Maximum Switch Duty Cycle
Gate On Voltage
Gate Off Voltage
Max Gate Source Current
Max Gate Sink Current
Gate Drive Undervoltage Lockout (Note 5)
Switch Current Limit Blanking Time
Sense Voltage Shutdown Voltage
Sense Voltage Fault Threshold
Output Voltage Slew Rising Edge
Output Voltage Slew Falling Edge
Output Current Slew Rising Edge (CS pin V)
Output Current Slew Falling Edge (CS pin V)
Minimum Input Voltage (Note 4)
Supply Current (Note 3)
Shutdown Turn-On Threshold
Shutdown Turn-On Voltage Hysteresis
Shutdown Input Current Hysteresis
5V Reference Voltage
5V Reference Short-Circuit Current
A
= 25 C. V
The
CONDITIONS
Oscillator Frequency = 250kHz
R
Osc Frequency = 25kHz
V
V
V
V
V
V
V
R
R
R
R
V
R
R
6.5V V
6.5V V
V
V
IN
IN
IN
IN
IN
GCL
C
GCL
IN
IN
VSL
VSL
VSL
VSL
VSL
VSL
VSL
Pulled Low
IN
= 12, GCL = 12
= 12, GCL = 8
= 12V
= 12V
= 12V
= 6.5V Source
= 6.5V Sink
= R
= 6.5V
= R
= R
= R
= R
= V
= R
= R
denotes the specifications which apply over the full operating
= 12V, V
CSL
CSL
CSL
CSL
IN
IN
IN
CSL
CSL
CSL
design, characterization and correlation with statistical process
controls.The LT1738I is guaranteed and tested to meet performance
specifications from – 40 C to 125 C.
Note 4: Output gate drive is enabled at this voltage. The GCL voltage will
also determine driver activity.
Note 5: Gate drive is ensured to be on when V
= 3.9k,
= 17k
= 17k
= 17k
= 17k
= 17k
= 17k
20V, IV5 = 5mA
20V, IV5 = – 5mA
C
= 0.9V, V
V
V
FB
IN
IN
= V
= 12
= 20
REF
, R
VSL
, R
1.31
4.85
4.80
MIN
–10
290
0.7
7.6
0.3
0.3
90
10
86
50
10
10
CSL
= 16.9k, R
IN
93.5
10.4
2.55
1.39
TYP
250
100
103
220
110
1.4
7.9
0.2
7.3
2.1
2.1
is greater than max value.
40
26
19
12
35
24
5
5
T
= 16.9k and
MAX
10.7
0.35
1.48
5.20
5.15
120
300
180
LT1738
8.1
7.5
3.6
40
55
35
2
UNITS
1738fa
3
V/ s
V/ s
V/ s
V/ s
kHz
kHz
mV
mV
mA
mA
mV
mA
mA
k
ns
%
V
V
V
A
A
V
V
V
A
V
V