LT1738 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Lista de partido
LT1738 Datasheet PDF : 20 Pages
| |||
LT1738
ABSOLUTE AXI U RATI GS
(Note 1)
Supply Voltage (VIN) ................................................ 20V
Gate Drive Current ..................................... Internal Limit
V5 Current ................................................. Internal Limit
SHDN Pin Voltage .................................................... 20V
Feedback Pin Voltage (Trans. 10ms) ...................... ±10V
Feedback Pin Current ............................................ 10mA
Negative Feedback Pin Voltage (Trans. 10ms) ........ ±10V
CS Pin .......................................................................... 5V
GCL Pin ..................................................................... 16V
SS Pin .......................................................................... 3V
Operating Junction Temperature Range
(Note 3) ............................................ – 40°C to 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
GATE 1
CAP 2
GCL 3
CS 4
V5 5
SYNC 6
CT 7
RT 8
FB 9
NFB 10
TOP VIEW
20 PGND
19 NC
18 NC
17 VIN
16 RVSL
15 RCSL
14 SHDN
13 SS
12 VC
11 GND
ORDER PART
NUMBER
LT1738EG
LT1738IG
G PACKAGE
20-LEAD PLASTIC SSOP
TJMAX = 150°C, θJA = 110°C/ W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VC = 0.9V, VFB = VREF, RVSL, RCSL = 16.9k, RT = 16.9k and
other pins open unless otherwise noted.
SYMBOL PARAMETER
Error Amplifiers
VREF
IFB
FBREG
VNFR
Reference Voltage
Feedback Input Current
Reference Voltage Line Regulation
Negative Feedback Reference Voltage
INFR
NFBREG
gm
Negative Feedback Input Current
Negative Feedback Reference Voltage Line Regulation
Error Amplifier Transconductance
CONDITIONS
Measured at Feedback Pin
VFB = VREF
2.7V ≤ VIN ≤ 20V
Measured at Negative Feedback Pin
with Feedback Pin Open
VNFB = VNFR
2.7V ≤ VIN ≤ 20V
∆IC = ±50µA
IESK
IESRC
VCLH
VCLL
AV
FBOV
ISS
Error Amp Sink Current
Error Amp Source Current
Error Amp Clamp Voltage
Error Amp Clamp Voltage
Error Amplifier Voltage Gain
FB Overvoltage Shutdown
Soft-Start Charge Current
VFB = VREF + 150mV, VC = 0.9V
VFB = VREF – 150mV, VC = 0.9V
High Clamp, VFB = 1V
Low Clamp, VFB = 1.5V
Outputs Drivers Disabled
VSS = 1V
MIN TYP MAX UNITS
q 1.235 1.250 1.265
V
q
250 1000
nA
q
0.012 0.03
%/V
q –2.56 – 2.50 –2.45
V
–37 – 25
q
0.009 0.03
1100 1500 2200
q 700
2500
q 120
200
350
q 120
200
350
1.27
0.12
180
250
1.47
9.0
12
µA
%/V
µmho
µmho
µA
µA
V
V
V/V
V
µA
1738fa
2
Share Link: 