(Notes 2, 3) ............................................– 40°C to 125°C
Storage Temperature Range
DH .....................................................– 65°C to 125°C
S8 ......................................................– 65°C to 150°C
Lead Temperature (Soldering, 10 sec, S8) ............ 300°C
PIN CONFIGURATION
TOP VIEW
NC
NC
OUT
OUT
NC
NC
ADJ
AGND
1
2
3
4
5
6
7
8
17
16 NC
15 NC
14 IN
13 NC
12 IN
11 NC
10 PGND
9
SHDN
NC
NC
OUT
OUT
NC
NC
SENSE
AGND
1
2
3
4
5
6
7
8
17
TOP VIEW
16 NC
15 NC
14 IN
13 NC
12 IN
11 NC
10 PGND
9
SHDN
LT3021-ADJ
DH PACKAGE
16-LEAD (5mm
×
5mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 35°C/ W*,
θ
JC
= 3°C/W**
EXPOSED PAD IS GND (PIN 17) CONNECT TO PINS 8, 10
EXPOSED PAD MUST BE SOLDERED TO THE PCB
*SEE THE APPLICATIONS INFORMATION SECTION
**MEASURED JUNCTION TO PIN 17
TOP VIEW
NC 1
OUT 2
ADJ 3
AGND 4
8
7
6
5
IN
NC
PGND
SHDN
LT3021-FIXED
DH PACKAGE
16-LEAD (5mm
×
5mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 35°C/ W*,
θ
JC
= 3°C/W**
EXPOSED PAD IS GND (PIN 17) CONNECT TO PINS 8, 10
EXPOSED PAD MUST BE SOLDERED TO THE PCB
*SEE THE APPLICATIONS INFORMATION SECTION
**MEASURED JUNCTION TO PIN 17
TOP VIEW
NC 1
OUT 2
SENSE 3
AGND 4
8
7
6
5
IN
NC
PGND
SHDN
LT3021-ADJ
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 125°C/ W*,
θ
JC
= 40°C/W**
*SEE THE APPLICATIONS INFORMATION SECTION
**MEASURED JUNCTION TO PIN 6
LT3021-FIXED
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 125°C/ W*,
θ
JC
= 40°C/W**
*SEE THE APPLICATIONS INFORMATION SECTION
**MEASURED JUNCTION TO PIN 6
3021fc
2
LT3021/LT3021-1.2/
LT3021-1.5/LT3021-1.8
ORDER INFORMAITON
LEAD FREE FINISH
LT3021EDH#PBF
LT3021EDH-1.2#PBF
LT3021EDH-1.5#PBF
LT3021EDH-1.8#PBF
LT3021ES8#PBF
LT3021ES8-1.2#PBF
LT3021ES8-1.5#PBF
LT3021ES8-1.8#PBF
LT3021IS8-1.8#PBF
LEAD BASED FINISH
LT3021EDH
LT3021EDH-1.2
LT3021EDH-1.5
LT3021EDH-1.8
LT3021ES8
LT3021ES8-1.2
LT3021ES8-1.5
LT3021ES8-1.8
LT3021IS8-1.8
TAPE AND REEL
LT3021EDH#TRPBF
LT3021EDH-1.2#TRPBF
LT3021EDH-1.5#TRPBF
LT3021EDH-1.8#TRPBF
LT3021ES8#TRPBF
LT3021ES8-1.2#TRPBF
LT3021ES8-1.5#TRPBF
LT3021ES8-1.8#TRPBF
LT3021IS8-1.8#TRPBF
TAPE AND REEL
LT3021EDH#TR
LT3021EDH-1.2#TR
LT3021EDH-1.5#TR
LT3021EDH-1.8#TR
LT3021ES8#TR
LT3021ES8-1.2#TR
LT3021ES8-1.5#TR
LT3021ES8-1.8#TR
LT3021IS8-1.8#TR
PART MARKING*
3021
302112
302115
302118
3021
302112
302115
302118
302118
PART MARKING*
3021
302112
302115
302118
3021
302112
302115
302118
302118
PACKAGE DESCRIPTION
16-Lead (5mm
×
5mm) Plastic DFN
16-Lead (5mm
×
5mm) Plastic DFN
16-Lead (5mm
×
5mm) Plastic DFN
16-Lead (5mm
×
5mm) Plastic DFN
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
PACKAGE DESCRIPTION
16-Lead (5mm
×
5mm) Plastic DFN
16-Lead (5mm
×
5mm) Plastic DFN
16-Lead (5mm
×
5mm) Plastic DFN
16-Lead (5mm
×
5mm) Plastic DFN
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
8-Lead Plastic SO
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
3021fc
3
LT3021/LT3021-1.2/
LT3021-1.5/LT3021-1.8
ELECTRICAL CHARACTERISTICS
SYMBOL
Minimum Input Voltage
(Notes 5,14)
ADJ Pin Voltage (Notes 4, 5)
Regulated Output Voltage
(Note 4)
CONDITIONS
I
LOAD
= 500mA, T
J
> 0°C
I
LOAD
= 500mA, T
J
< 0°C
V
IN
= 1.5V, I
LOAD
= 1mA
1.15V < V
IN
< 10V, 1mA < I
LOAD
< 500mA
LT3021-1.2
LT3021-1.5
LT3021-1.8
Line Regulation (Note 6)
LT3021
LT3021-1.2
LT3021-1.5
LT3021-1.8
LT3021
LT3021-1.2
LT3021-1.5
LT3021-1.8
I
LOAD
= 10mA
I
LOAD
= 10mA
I
LOAD
= 500mA
I
LOAD
= 500mA
GND Pin Current
V
IN
= V
OUT(NOMINAL)
+ 0.4V
(Notes 8, 12)
Output Voltage Noise
ADJ Pin Bias Current
Shutdown Threshold
SHDN
Pin Current (Note 10)
Quiescent Current in Shutdown
Ripple Rejection (Note 6)
I
LOAD
= 0mA
I
LOAD
= 10mA
I
LOAD
= 100mA
I
LOAD
= 500mA
C
OUT
= 4.7μF I
LOAD
= 500mA, BW = 10Hz to 100kHz, V
OUT
= 1.2V
,
V
ADJ
= 0.2V, V
IN
= 1.2V (Notes 6, 9)
V
OUT
= Off to On
V
OUT
= On to Off
V
SHDN
= 0V, V
IN
= 10V
V
SHDN
= 10V, V
IN
= 10V
V
IN
= 6V, V
SHDN
= 0V
LT3021
LT3021-1.2
LT3021-1.5
LT3021-1.8
Current Limit (Note 12)
Input Reverse Leakage Current
Reverse Output Current
(Notes 11, 13)
V
IN
– V
OUT
= 1V, V
RIP
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
V
IN
– V
OUT
= 1V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25°C.
MIN
TYP
0.9
0.9
196
193
1.176
1.157
1.470
1.447
1.764
1.737
–1.75
–10.5
–13
–15.8
–2
–6
–7.5
–9
l
l
l
l
MAX
1.05
1.10
204
206
1.224
1.236
1.530
1.545
1.836
1.854
+1.75
10.5
13
15.8
2
6
7.5
9
75
110
190
285
250
10
50
0.9
±1
9.5
9
UNITS
V
V
mV
mV
V
V
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
μA
μA
mA
mA
μV
RMS
nA
V
V
μA
μA
μA
dB
dB
dB
dB
A
mA
200
200
1.200
1.200
1.500
1.500
1.800
1.800
0
0
0
0
0.4
1
1.5
2
45
155
110
920
2.25
6.20
300
20
0.61
0.61
3
3
70
60
58
56
1.8
V
IN
= 1.5V, I
LOAD
= 1mA
1.5V < V
IN
< 10V, 1mA < I
LOAD
< 500mA
V
IN
= 1.8V, I
LOAD
= 1mA
1.8V < V
IN
< 10V, 1mA < I
LOAD
< 500mA
V
IN
= 2.1V, I
LOAD
= 1mA
2.1V < V
IN
< 10V, 1mA < I
LOAD
< 500mA
ΔV
IN
= 1.15V to 10V, I
LOAD
= 1mA
ΔV
IN
= 1.5V to 10V, I
LOAD
= 1mA
ΔV
IN
= 1.8V to 10V, I
LOAD
= 1mA
ΔV
IN
= 2.1V to 10V, I
LOAD
= 1mA
V
IN
= 1.15V, ΔI
LOAD
= 1mA to 500mA
V
IN
= 1.5V, ΔI
LOAD
= 1mA to 500mA
V
IN
= 1.8V, ΔI
LOAD
= 1mA to 500mA
V
IN
= 2.1V, ΔI
LOAD
= 1mA to 500mA
Load Regulation (Note 6)
Dropout Voltage (Notes 7, 12)
0.25
V
IN
= 10V, V
OUT
= 0V
V
IN
= V
OUT(NOMINAL)
+ 0.5V, ΔV
OUT
= –5%
V
IN
= –10V, V
OUT
= 0V
LT3021
LT3021-1.2
LT3021-1.5
LT3021-1.8
V
OUT
= 1.2V, V
IN
= 0V
V
OUT
= 1.2V, V
IN
= 0V
V
OUT
= 1.5V, V
IN
= 0V
V
OUT
= 1.8V, V
IN
= 0V
550
1
0.5
10
10
10
20
5
15
15
15
μA
μA
μA
μA
μA
3021fc
4
LT3021/LT3021-1.2/
LT3021-1.5/LT3021-1.8
ELECTRICAL CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25°C.
voltage, not the 0.5V output voltage. Specifications for fixed output voltage
devices are referred to the output voltage.
Note 7:
Dropout voltage is the minimum input to output voltage differential
needed to maintain regulation at a specified output current. In dropout the
output voltage equals: (V
IN
– V
DROPOUT
).
Note 8:
GND pin current is tested with V
IN
= V
OUT(NOMINAL)
+ 0.4V and a
current source load. GND pin current will increase in dropout. See GND pin
current curves in the Typical Performance Characteristics section.
Note 9:
Adjust pin bias current flows out of the ADJ pin.
Note 10:
Shutdown pin current flows into the
SHDN
pin.
Note 11:
Reverse output current is tested with IN grounded and OUT
forced to the rated output voltage. This current flows into the OUT pin and
out of the GND pin. For fixed voltage devices this includes the current in
the output resistor divider.
Note 12:
The LT3021 is tested and specified for these conditions with an
external resistor divider (20k and 100k) setting V
OUT
to 1.2V. The external
resistor divider adds 10μA of load current.
Note 13:
Reverse current is higher for the case of (rated_output) < V
OUT
< V
IN,
because the no-load recovery circuitry is active in this region and is
trying to restore the output voltage to its nominal value.
Note 14:
Minimum input voltage is the minimum voltage required by the
control circuit to regulate the output voltage and supply the full 500mA
rated current. This specification is tested at V
OUT
= 0.5V. At higher output
voltages the minimum input voltage required for regulation will be equal to
the regulated output voltage V
OUT
plus the dropout voltage.
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 LT3021 regulators are tested and specified under pulse load
conditions such that T
J
≈ T
A
. The LT3021E regulators are 100% tested
at T
A
= 25°C. Performance at –40°C and 125°C is assured by design,
characterization and correlation with statistical process controls. The
LT3021I regulators are guaranteed over the full –40ºC to 125ºC operating
junction temperature range.
Note 3:
This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 4:
Maximum junction temperature limits operating conditions. The
regulated output voltage specification does not apply for all possible
combinations of input voltage and output current. Limit the output current
range if operating at maximum input voltage. Limit the input voltage range
if operating at maximum output current.
Note 5:
Typically the LT3021 supplies 500mA output current with a 1V
input supply. The guranteed minimum input voltage for 500mA output
current is 1.10V.
Note 6:
The LT3021 is tested and specified for these conditions with an
external resistor divider (20k and 30.1k) setting V
OUT
to 0.5V. The external
resistor divider adds 10μA of output load current. The line regulation and
load regulation specifications refer to the change in the 0.2V reference
我的机器上有两个硬盘
我的boot.ini:
timeout=6
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professio ......
PCB设计
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