Reverse Voltage ......................................................–15V
Output Short-Circuit Duration, T
A
= 25°C ................5 sec
Specified Temperature Range ...................... 0°C to 70°C
TOP VIEW
4
1
OUT
2
GND
3
IN
DC PACKAGE
3-LEAD (2mm
×
2mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 102°C/W
EXPOSED PAD IS GND, MUST BE SOLDERED TO PCB
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
AVAILABLE OPTIONS
OUTPUT VOLTAGE
(V)
2.5
2.5
2.5
3
3
3
3.3
3.3
3.3
SPECIFIED TEMPERATURE
RANGE
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
ACCURACY
(%)
0.2
0.4
0.5
0.2
0.4
0.5
0.2
0.4
0.5
TEMPERATURE
COEFFICIENT (ppm/°C)
20
20
50
20
20
50
20
20
50
PART ORDER
NUMBER
LT6660HCDC-2.5
LT6660JCDC-2.5
LT6660KCDC-2.5
LT6660HCDC-3
LT6660JCDC-3
LT6660KCDC-3
LT6660HCDC-3.3
LT6660JCDC-3.3
LT6660KCDC-3.3
2
U
PACKAGE/ORDER I FOR ATIO
W
U
U
W W
W
ABSOLUTE
AXI U RATI GS
Operating Temperature Range
(Note 2) ............................................... –40°C to 85°C
Storage Temperature Range (Note 3)..... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
ORDER PART NUMBER
LT6660HCDC-2.5
LT6660JCDC-2.5
LT6660KCDC-2.5
LT6660HCDC-3
LT6660JCDC-3
LT6660KCDC-3
LT6660HCDC-3.3
LT6660JCDC-3.3
LT6660KCDC-3.3
LT6660HCDC-5
LT6660JCDC-5
LT6660KCDC-5
LT6660HCDC-10
LT6660JCDC-10
LT6660KCDC-10
DFN PART MARKING*
LBXN
LBXN
LBXN
LBYV
LBYV
LBYV
LBYW
LBYW
LBYW
LBYT
LBYT
LBYT
LBYX
LBYX
LBYX
6660fa
LT6660
AVAILABLE OPTIONS
OUTPUT VOLTAGE
(V)
5
5
5
10
10
10
SPECIFIED TEMPERATURE
RANGE
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
0°C to 70°C
ACCURACY
(%)
0.2
0.4
0.5
0.2
0.4
0.5
TEMPERATURE
COEFFICIENT (ppm/°C)
20
20
50
20
20
50
PART ORDER
NUMBER
LT6660HCDC-5
LT6660JCDC-5
LT6660KCDC-5
LT6660HCDC-10
LT6660JCDC-10
LT6660KCDC-10
ELECTRICAL CHARACTERISTICS
PARAMETER
Output Voltage Tolerance
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= V
OUT
+ 2.5V, I
OUT
= 0 unless otherwise specified.
CONDITIONS
LT6660HCDC
LT6660JCDC
LT6660KCDC
LT6660HCDC
LT6660JCDC
LT6660KCDC
V
OUT
+ 0.9V ≤ V
IN
≤ V
OUT
+ 2.5V
V
OUT
+ 2.5V ≤ V
IN
≤ 20V
MIN
–0.2
–0.4
–0.5
●
●
●
●
50
●
1000
●
50
●
20
●
2.5
●
●
●
40
0.5
4
4
100
50
250
115
●
LT6660-3
●
LT6660-3.3
●
LT6660-5
●
LT6660-10
●
215
160
145
145
145
175
180
220
180
220
200
240
270
350
TYP
MAX
0.2
0.4
0.5
20
20
50
800
1000
100
130
3000
4000
200
300
70
100
10
0.9
1.3
1.4
10
UNITS
%
%
%
ppm/°C
ppm/°C
ppm/°C
ppm/V
ppm/V
ppm/V
ppm/V
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mA
ppm/mW
V
V
V
mA
µA
ppm (P-P)
ppm (RMS)
ppm/√kHr
ppm
ppm
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
6660fa
Output Voltage Temperature Coefficient (Note 4)
Line Regulation
10
10
25
150
Load Regulation Sourcing (Note 5)
I
OUT
= 100µA
I
OUT
= 10mA
I
OUT
= 20mA
Thermal Regulation (Note 6)
Dropout Voltage (Note 7)
ΔP
= 200mW
V
IN
– V
OUT
,
ΔV
OUT
≤ 0.2%, I
OUT
= 0
V
IN
– V
OUT
,
ΔV
OUT
≤ 0.2%, I
OUT
= 10mA
Output Current
Reverse Leakage
Output Voltage Noise (Note 8)
Long-Term Stability of Output Voltage (Note 9)
Hysteresis (Note 10)
Supply Current
Short V
OUT
to GND
V
IN
= –15V
0.1Hz ≤ f ≤ 10Hz
10Hz ≤ f ≤ 1kHz
ΔT
= 0°C to 70°C
ΔT
= –40°C to 85°C
LT6660-2.5
●
●
3
LT6660
ELECTRICAL CHARACTERISTICS
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LT6660 is guaranteed functional over the operating
temperature range of –40°C to 85°C.
Note 3:
If the parts are stored outside of the specified temperature range,
the output may shift due to hysteresis.
Note 4:
Temperature coefficient is measured by dividing the change in
output voltage by the specified temperature range. Incremental slope is
also measured at 25°C.
Note 5:
Load regulation is measured on a pulse basis from no load to the
specified load current. Output changes due to die temperature change
must be taken into account separately.
Note 6:
Thermal regulation is caused by die temperature gradients created
by load current or input voltage changes. This effect must be added to
normal line or load regulation. This parameter is not 100% tested.
Note 7:
Excludes load regulation errors.
Note 8:
Peak-to-peak noise is measured with a single pole highpass filter
at 0.1Hz and 2-pole lowpass filter at 10Hz. The unit is enclosed in a still-air
environment to eliminate thermocouple effects on the leads. The test time
is 10 sec. RMS noise is measured with a single pole highpass filter at
10Hz and a 2-pole lowpass filter at 1kHz. The resulting output is full wave
rectified and then integrated for a fixed period, making the final reading an
average as opposed to RMS. A correction factor of 1.1 is used to convert
from average to RMS and a second correction of 0.88 is used to correct
for the nonideal bandpass of the filters.
Note 9:
Long-term stability typically has a logarithmic characteristic
and therefore, changes after 1000 hours tend to be much smaller than
before that time. Total drift in the second thousand hours is normally less
than one third that of the first thousand hours with a continuing trend
toward reduced drift with time. Long-term stability will also be affected by
differential stresses between the IC and the board material created during
board assembly.
Note 10:
Hysteresis in output voltage is created by package stress that
differs depending on whether the IC was previously at a higher or lower
temperature. Output voltage is always measured at 25°C, but the IC
is cycled to 70°C or 0°C before successive measurements. Hysteresis
is roughly proportional to the square of the temperature change. For
instruments that are stored at well-controlled temperatures (within 20 or
30 degrees of operational temperature) hysteresis is not a problem.
Characteristic curves are similar for all voltage
options of the LT6660. Curves from the LT6660-2.5 and the LT6660-10 represent the extremes of the voltage options. Characteristic
curves for other output voltages fall between these curves, and can be estimated based on their voltage output.
2.5V Minimum Input-Output
Voltage Differential
100
OUTPUT VOLTAGE CHANGE (mV)
0
OUTPUT VOLTAGE CHANGE (mV)
– 0.5
– 1.0
– 1.5
– 2.0
– 2.5
– 3.0
– 3.5
– 4.0
0.1
1
10
OUTPUT CURRENT (mA)
100
6660 G02
TYPICAL PERFOR A CE CHARACTERISTICS
U W
2.5V Load Regulation, Sourcing
120
100
80
60
40
20
0
2.5V Load Regulation, Sinking
OUTPUT CURRENT (mA)
10
125°C
– 55°C
25°C
1
– 55°C
25°C
125°C
25°C
125°C
– 55°C
0.1
0
0.5
1.0
1.5
2.0
INPUT-OUTPUT VOLTAGE (V)
2.5
6660 G01
0
1
2
3
4
OUTPUT CURRENT (mA)
5
6660 G03
6660fa
4
LT6660
Characteristic curves are similar for all voltage
options of the LT6660. Curves from the LT6660-2.5 and the LT6660-10 represent the extremes of the voltage options. Characteristic
curves for other output voltages fall between these curves, and can be estimated based on their voltage output.
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Embedded System
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