LTC1697 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1697 Datasheet PDF : 8 Pages
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LTC1697
ABSOLUTE AXI U RATI GS
(Notes 1, 2)
VIN Voltage .................................................. –0.5V to 6V
VC, OVSEN, CDIM, RPROG, SW
Voltages ................................... –0.5V to (VIN + 0.3V)
SHDN, VDIM Pins ......................................... –0.5V to 6V
LAMP Pin ................................................. –0.5V to 0.5V
Operating Temperature Range (Note 5) ...–40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
CDIM 1
VDIM 2
0VSEN 3
SW 4
GND 5
TOP VIEW
10 SHDN
9 RPROG
8 VC
7 VIN
6 LAMP
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 125°C,
θJA = 160°C/W 1 LAYER BOARD
ORDER PART
NUMBER
LTC1697EMS
MS PART MARKING
LTZR
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. 2.8V < VIN ≤ 5.5V unless otherwise specified.
SYMBOL
VIN
VUVLO
IQ-SHDN
IQ-Active
ILEAK
RON
IMAX
% DC
fSWITCH
fDIM
VDIM
IDIM
RLAMP
IL(ERROR)
RP(RANGE)
VSHDN-H
VSHDN-L
ISHDN
IOVSEN
VOVSEN
VDIM(SD-I)
VDIM(SD-H)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Operating Supply Voltage Range
(Note 2)
● 2.8
5.5
V
Undervoltage Lockout
●
2.77
V
Quiescent Current - SHDN
Quiescent Current - Active
Switch Leakage
SHDN = 0V; VDIM = 0V
VC = 0V, SHDN = VIN = VDIM = 4.2V (Note 4)
1
2
µA
0.9
1.5
mA
0.1
1
µA
Switch On Resistance
Switch Current Limit
VIN = 4V
0.18
Ω
● 0.9
1.6
A
Duty Cycle
●0
95
%
Switching Frequency
● 240
300
370
kHz
Dimming PWM Frequency
VDIM Input Voltage
CDIM = 0.022µF (Note 3)
Dimming PWM Duty Cycle = 0%
Dimming PWM Duty Cycle = 100%
● 190
250
310
Hz
1.0
V
2.0
V
VDIM Input Bias Current
Internal RLAMP Resistance
Lamp Current Accuracy
Programming Resistor Range
VDIM = 2V
±1
µA
LAMP Pin to GND
50
60
Ω
|1– ILAMP(AVG)/(32/6.4k)| • 100% (Note 6) ●
ILAMP = 5mA
2
6
%
(Note 10)
● 6.4
16
kΩ
SHDN Input High
1.2
V
SHDN Input Low (Note 9)
0.4
V
SHDN Input Current
Overvoltage Sense Protect Current (Note 7)
Overvoltage Sense Pin Voltage
VSHDN = VIN
ILAMP = 5mA, RPROG = 6.4k
●
0.1
1
µA
● 16.65 21.5 26.35
µA
● 0.95
1.2
1.5
V
Passive Shutdown Voltage (Note 8)
●
0.4
V
Not in Passive Shutdown
● 1.05
V
1697f
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