查询LT1963EQ-1.5供应商
FEATURES
■
Optimized for Fast Transient Response
■
Output Current: 1.5A
■
Dropout Voltage: 340mV
■
Low Noise: 40µV
■
1mA Quiescent Current
■
No Protection Diodes Needed
■
Controlled Quiescent Current in Dropout
■
Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V
■
Adjustable Output from 1.21V to 20V
■
<1µA Quiescent Current in Shutdown
■
Stable with 10µF Output Capacitor
■
Reverse Battery Protection
■
No Reverse Current
■
Thermal Limiting
(10Hz to 100kHz)
RMS
U
APPLICATIO S
■
3.3V to 2.5V Logic Power Supplies
■
Post Regulator for Switching Supplies
LT1963 Series
1.5A, Low Noise,
Fast Transient Response
LDO Regulators
U
DESCRIPTIO
The LT®1963 series are low dropout regulators optimized
for fast transient response. The devices are capable of
supplying 1.5A of output current with a dropout voltage of
340mV. Operating quiescent current is 1mA, dropping to
<1µA in shutdown. Quiescent current is well controlled; it
does not rise in dropout as it does with many other
regulators. In addition to fast transient response, the
LT1963 regulators have very low output noise which
makes them ideal for sensitive RF supply applications.
Output voltage range is from 1.21V to 20V. The LT1963
regulators are stable with output capacitors as low as
10µF. Internal protection circuitry includes reverse battery
protection, current limiting, thermal limiting and reverse
current protection. The devices are available in fixed
output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an
adjustable device with a 1.21V reference voltage. The
LT1963 regulators are available in 5-lead TO-220, DD,
3-lead SOT-223 and 8-lead SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
3.3V to 2.5V Regulator
IN
V
> 3V
IN
10µF
SHDN
OUT
LT1963-2.5
SENSE
GND
U
Dropout Voltage
400
350
2.5V
++
1.5A
10µF
1963 TA01
300
250
200
150
DROPOUT VOLTAGE (mV)
100
50
0
0.2
0
0.4
OUTPUT CURRENT (A)
0.6
0.8
1.0
1.2
1.4
1963 TA02
1.6
1963fa
1
LT1963 Series
WWWU
ABSOLUTE AXI U RATI GS
(Note 1)
IN Pin Voltage........................................................ ±20V
OUT Pin Voltage .................................................... ±20V
Input to Output Differential Voltage (Note 2) ......... ±20V
SENSE Pin Voltage ............................................... ±20V
ADJ Pin Voltage ...................................................... ±7V
UU
W
PACKAGE/ORDER I FOR ATIO
FRONT VIEW
3
2
1
SENSE/ADJ*
OUT
GND
IN
SHDN
OUT
GND
IN
5
TAB IS
GND
5-LEAD PLASTIC DD
*PIN 5 = SENSE FOR LT1963-1.8/LT1963-2.5/LT1963-3.3
= ADJ FOR LT1963
T
JMAX
TAB IS
GND
3-LEAD PLASTIC SOT-223
T
JMAX
4
3
2
1
Q PACKAGE
= 150°C, θJA = 30°C/ W
FRONT VIEW
ST PACKAGE
= 150°C, θJA = 50°C/ W
ORDER PART
NUMBER
LT1963EQ
LT1963EQ-1.5
LT1963EQ-1.8
LT1963EQ-2.5
LT1963EQ-3.3
ORDER PART
NUMBER
LT1963EST-1.5
LT1963EST-1.8
LT1963EST-2.5
LT1963EST-3.3
ST PART
MARKING
196315
196318
196325
196333
SHDN Pin Voltage................................................. ±20V
Output Short-Circuit Duration......................... Indefinite
Operating Junction Temperature Range –45°C to 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
FRONT VIEW
5
4
3
2
1
TAB IS
GND
*PIN 5 = SENSE FOR LT1963-1.8/LT1963-2.5/LT1963-3.3
T PACKAGE
5-LEAD PLASTIC TO-220
= ADJ FOR LT1963
T
= 150°C, θJA = 50°C/ W
JMAX
SENSE/ADJ*
OUT
GND
IN
SHDN
ORDER PART
NUMBER
LT1963ET
LT1963ET-1.5
LT1963ET-1.8
LT1963ET-2.5
LT1963ET-3.3
ORDER PART
NUMBER
TOP VIEW
1
OUT
SENSE/ADJ*
*PIN 2 = SENSE FOR LT1963-1.8/LT1963-2.5/LT1963-3.3
= ADJ FOR LT1963
2
GND
3
NC
4
S8 PACKAGE
8-LEAD PLASTIC SO
= 150°C, θJA = 70°C/ W
T
JMAX
8
IN
GND
7
GND
6
SHDN
5
LT1963ES8
LT1963ES8-1.5
LT1963ES8-1.8
LT1963ES8-2.5
LT1963ES8-3.3
S8 PART
MARKING
1963
196315
196318
196325
196333
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. (Note 3)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage (Notes 4,12) I
Regulated Output Voltage (Note 5) LT1963-1.5 VIN = 2.21V, I
= 0.5A 1.9 V
LOAD
= 1.5A ● 2.1 2.5 V
I
LOAD
= 1mA 1.477 1.500 1.523 V
2.5V < VIN < 20V, 1mA < I
LT1963-1.8 VIN = 2.3V, I
2.8V < VIN < 20V, 1mA < I
LOAD
= 1mA 1.773 1.800 1.827 V
LOAD
< 1.5A ● 1.447 1.500 1.545 V
LOAD
< 1.5A ● 1.737 1.800 1.854 V
LOAD
1963fa
2
LT1963 Series
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C. (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
LT1963-2.5 VIN = 3V, I
3.5V < V
LT1963-3.3 VIN = 3.8V, I
4.3V < V
ADJ Pin Voltage LT1963 VIN = 2.21V, I
(Notes 4, 5) 2.5V < V
Line Regulation LT1963-1.5 ∆VIN = 2.21V to 20V, I
LT1963-1.8 ∆VIN = 2.3V to 20V, I
LT1963-2.5 ∆V
LT1963-3.3 ∆V
= 3V to 20V, I
IN
= 3.8V to 20V, I
IN
LT1963 (Note 4) ∆VIN = 2.21V to 20V, I
Load Regulation LT1963-1.5 VIN = 2.5V, ∆I
= 2.5V, ∆I
V
IN
LT1963-1.8 VIN = 2.8V, ∆I
= 2.8V, ∆I
V
IN
LT1963-2.5 VIN = 3.5V, ∆I
= 3.5V, ∆I
V
IN
LT1963-3.3 VIN = 4.3V, ∆I
VIN = 4.3V, ∆I
LT1963 (Note 4) VIN = 2.5V, ∆I
= 2.5V, ∆I
V
IN
Dropout Voltage I
= V
V
IN
OUT(NOMINAL)
(Notes 6, 7, 12)
GND Pin Current I
= V
V
IN
OUT(NOMINAL)
+ 1V I
(Notes 6, 8)
Output Voltage Noise C
= 1mA 0.02 0.06 V
LOAD
I
= 1mA ● 0.10 V
LOAD
I
= 100mA 0.10 0.17 V
LOAD
= 100mA ● 0.22 V
I
LOAD
I
= 500mA 0.19 0.27 V
LOAD
I
= 500mA ● 0.35 V
LOAD
I
= 1.5A 0.34 0.45 V
LOAD
= 1.5A ● 0.55 V
I
LOAD
= 0mA ● 1.0 1.5 mA
LOAD
= 1mA ● 1.1 1.6 mA
LOAD
I
= 100mA ● 3.8 5.5 mA
LOAD
I
= 500mA ● 15 25 mA
LOAD
= 1.5A ● 80 120 mA
I
LOAD
= 10µF, I
OUT
= 1.5A, BW = 10Hz to 100kHz 40 µV
LOAD
ADJ Pin Bias Current (Notes 4, 9) 3 10 µA
Shutdown Threshold V
SHDN Pin Current V
(Note 10) V
Quiescent Current in Shutdown VIN = 6V, V
Ripple Rejection VIN – V
Current Limit VIN = 7V, V
= Off to On ● 0.90 2 V
OUT
V
= On to Off ● 0.25 0.75 V
OUT
= 0V 0.01 1 µA
SHDN
= 20V 3 30 µA
SHDN
= 0V 0.01 1 µA
SHDN
= 1.5V (Avg), V
OUT
f
RIPPLE
= V
V
IN
= 120Hz, I
OUT
OUT(NOMINAL)
= 0.75A
LOAD
= 0V 2 A
+ 1V, ∆V
Input Reverse Leakage Current (Note 13) Q, T, S8 Packages VIN = –20V, V
ST Package V
Reverse Output Current (Note 11) LT1963-1.5 V
LT1963-1.8 V
LT1963-2.5 V
LT1963-3.3 V
LT1963 (Note 4) V
IN
= 1.5V, VIN < 1.5V 600 1200 µA
OUT
= 1.8V, VIN < 1.8V 600 1200 µA
OUT
= 2.5V, VIN < 2.5V 600 1200 µA
OUT
= 3.3V, VIN < 3.3V 600 1200 µA
OUT
= 1.21V, VIN < 1.21V 300 600 µA
OUT
= 1mA 2.462 2.500 2.538 V
LOAD
< 20V, 1mA < I
IN
= 1mA 3.250 3.300 3.350 V
LOAD
< 20V, 1mA < I
IN
= 1mA 1.192 1.210 1.228 V
LOAD
< 20V, 1mA < I
IN
LOAD
LOAD
LOAD
= 1mA to 1.5A 2 9 mV
LOAD
= 1mA to 1.5A ● 18 mV
LOAD
= 1mA to 1.5A 2 10 mV
LOAD
= 1mA to 1.5A ● 20 mV
LOAD
= 1mA to 1.5A 2.5 15 mV
LOAD
= 1mA to 1.5A ● 30 mV
LOAD
= 1mA to 1.5A 3 20 mV
LOAD
= 1mA to 1.5A ● 35 mV
LOAD
= 1mA to 1.5A 2 8 mV
LOAD
= 1mA to 1.5A ● 15 mV
LOAD
= 0.5V
RIPPLE
= –0.1V ● 1.6 A
OUT
= 0V ● 1mA
OUT
= –20V, V
= 0V ● 2mA
OUT
< 1.5A ● 2.412 2.500 2.575 V
LOAD
< 1.5A ● 3.200 3.300 3.400 V
LOAD
< 1.5A ● 1.174 1.210 1.246 V
LOAD
= 1mA ● 2.0 10 mV
LOAD
= 1mA ● 2.5 10 mV
= 1mA ● 3.0 10 mV
= 1mA ● 3.5 10 mV
= 1mA ● 1.5 10 mV
LOAD
,5563dB
P-P
RMS
1963fa
3
LT1963 Series
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Absolute maximum input to output differential voltage can not be
achieved with all combinations of rated IN pin and OUT pin voltages. With
the IN pin at 20V, the OUT pin may not be pulled below 0V. The total
measured voltage from IN to OUT can not exceed ±20V.
Note 3: The LT1963 regulators are tested and specified under pulse load
conditions such that T
≈ TA. The LT1963 is 100% tested at
J
TA = 25°C. Performance at –40°C and 125°C is assured by design,
characterization and correlation with statistical process controls.
Note 4: The LT1963 (adjustable version) is tested and specified for these
conditions with the ADJ pin connected to the OUT pin.
Note 5: Operating conditions are limited by maximum junction
temperature. The regulated output voltage specification will not apply for
all possible combinations of input voltage and output current. When
operating at maximum input voltage, the output current range must be
limited. When operating at maximum output current, the input voltage
range must be limited.
Note 6: To satisfy requirements for minimum input voltage, the LT1963
(adjustable version) is tested and specified for these conditions with an
external resistor divider (two 4.12k resistors) for an output voltage of
2.4V. The external resistor divider will add a 300µA DC load on the output.
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 will be equal to: V
– V
IN
Note 8: GND pin current is tested with V
DROPOUT
= V
IN
.
OUT(NOMINAL)
current source load. The GND pin current will decrease at higher input
voltages.
Note 9: ADJ pin bias current flows into the ADJ pin.
Note 10: SHDN pin current flows into the SHDN pin.
Note 11: Reverse output current is tested with the IN pin grounded and the
OUT pin forced to the rated output voltage. This current flows into the OUT
pin and out the GND pin.
Note 12. For the LT1963, LT1963-1.5 and LT1963-1.8 dropout voltage will
be limited by the minimum input voltage specification under some output
voltage/load conditions.
Note 13. For the ST package, the input reverse leakage current increases
due to the additional reverse leakage current for the SHDN pin, which is
tied internally to the IN pin.
UW
TYPICAL PERFOR A CE CHARACTERISTICS
Typical Dropout Voltage
500
450
400
350
300
250
200
150
DROPOUT VOLTAGE (mV)
100
50
0
0
0.2 0.6
TJ = 125°C
TJ = 25°C
0.4
0.8
OUTPUT CURRENT (A)
1.0
1.2
1.4
1963 • G01
1.6
Quiescent Current LT1963-1.8 Output Voltage LT1963-2.5 Output Voltage
1.4
1.2
1.0
0.8
0.6
0.4
QUIESCENT CURRENT (mA)
0.2
0
–50
LT1963-1.8/-2.5/-3.3
VIN = 6V
= ∞, IL = 0
R
L
= V
V
SHDN
–25 0
IN
50 100 125
25 75
TEMPERATURE (°C)
LT1963
1963 G04
Guaranteed Dropout Voltage Dropout Voltage
600
TEST POINTS
500
400
300
200
100
GUARANTEED DROPOUT VOLTAGE (mV)
0
0
0.2 0.6
1.84
IL = 1mA
1.83
1.82
1.81
1.80
1.79
OUTPUT VOLTAGE (V)
1.78
1.77
1.76
–25 25 75 125
–50
TJ ≤ 125°C
0.4
0.8
OUTPUT CURRENT (A)
050
TEMPERATURE (°C)
1.0
TJ ≤ 25°C
1.2
1.4
100
1.6
1963 • G02
1963 G05
500
450
400
350
300
250
200
150
DROPOUT VOLTAGE (mV)
100
2.58
2.56
2.54
2.52
2.50
2.48
OUTPUT VOLTAGE (V)
2.46
2.44
2.42
IL = 1.5A
50
0
–50
–25
IL = 1mA
–25 25 75 125
–50
IL = 0.5A
0
TEMPERATURE (°C)
050
TEMPERATURE (°C)
25
+ 1V and a
IL = 100mA
50
IL = 1mA
75
100
100
1963 G03
1963 G06
1963fa
125
4
UW
TYPICAL PERFOR A CE CHARACTERISTICS
LT1963 Series
LT1963-3.3 Output Voltage
3.38
IL = 1mA
3.36
3.34
3.32
3.30
3.28
OUTPUT VOLTAGE (V)
3.26
3.24
3.22
–25 25 75 125
–50
050
TEMPERATURE (°C)
LT1963-2.5 Quiescent Current
14
12
10
8
6
100
TJ = 25°C
= ∞
R
L
= V
V
SHDN
1963 G07
IN
LT1963 ADJ Pin Voltage
1.230
IL = 1mA
1.225
1.220
1.215
1.210
1.205
ADJ PIN VOLTAGE (V)
1.200
1.195
1.190
–25 25 75 125
–50
050
TEMPERATURE (°C)
100
1963 G08
LT1963-1.8 Quiescent Current
14
12
10
8
6
4
QUIESCENT CURRENT (mA)
2
0
0
2
1
34
INPUT VOLTAGE (V)
LT1963-3.3 Quiescent Current LT1963 Quiescent Current
14
12
10
8
6
TJ = 25°C
= ∞
R
L
= V
V
SHDN
IN
14
12
10
8
6
TJ = 25°C
= ∞
R
L
= V
V
SHDN
IN
5678910
1963 G09
TJ = 25°C
= 4.3k
R
L
= V
V
SHDN
IN
4
QUIESCENT CURRENT (mA)
2
0
0
2
1
34
INPUT VOLTAGE (V)
LT1963-1.8 GND Pin Current
25
TJ = 25°C
= V
V
SHDN
IN
*FOR V
20
15
10
GND PIN CURRENT (mA)
5
0
0
= 1.18V
OUT
RL = 18, IL = 100mA*
RL = 180, IL = 10mA*
1
3
2
INPUT VOLTAGE (V)
RL = 6, IL = 300mA*
4
1963 G10
1963 G13
4
QUIESCENT CURRENT (mA)
2
0
1056789
0
2
1
34
INPUT VOLTAGE (V)
1056789
1963 G11
4
QUIESCENT CURRENT (mA)
2
0
0
4
2
68
INPUT VOLTAGE (V)
2010 12 14 16 18
1963 G12
LT1963-2.5 GND Pin Current LT1963-3.3 GND Pin Current
25
20
15
10
GND PIN CURRENT (mA)
5
0
1098765
0
RL = 8.33, IL = 300mA*
RL = 25, IL = 100mA*
RL = 250, IL = 10mA*
1
3
2
INPUT VOLTAGE (V)
TJ = 25°C
= V
V
SHDN
IN
OUT
= 2.5V
1963 G14
1098765
*FOR V
4
25
20
15
10
GND PIN CURRENT (mA)
5
0
0
RL = 330, IL = 100mA*
1
3
2
INPUT VOLTAGE (V)
TJ = 25°C
= V
V
SHDN
*FOR V
OUT
RL = 11, IL = 300mA*
RL = 33, IL = 100mA*
4
IN
= 3.3V
1098765
1963 G15
1963fa
5
LT1963 Series
OUTPUT CURRENT (A)
100
90
80
70
60
50
40
30
20
10
0
GND PIN CURRENT (mA)
1963 G21
0 0.2 0.4 0.6
0.8
1.0
1.2 1.4 1.6
V
IN = VOUT (NOMINAL)
+1V
UW
TYPICAL PERFOR A CE CHARACTERISTICS
LT1963 GND Pin Current
10
8
6
4
GND PIN CURRENT (mA)
2
0
0
RL = 4.33, IL = 300mA*
RL = 12.1, IL = 100mA*
RL = 121, IL = 10mA*
1
3
4
2
INPUT VOLTAGE (V)
LT1963-3.3 GND Pin Current
100
90
80
70
60
50
40
30
GND PIN CURRENT (mA)
20
10
0
0123
RL = 2.2, IL = 1.5A*
RL = 3.3, I
RL = 6.6, IL = 500mA*
4
INPUT VOLTAGE (V)
TJ = 25°C
= V
V
SHDN
IN
*FOR V
5
= 1.21V
OUT
TJ = 25°C
= V
V
SHDN
IN
*FOR V
L
678910
= 1A*
OUT
1963 G16
= 3.3V
1963 G19
LT1963-1.8 GND Pin Current LT1963-2.5 GND Pin Current
100
90
80
70
60
50
40
30
GND PIN CURRENT (mA)
20
10
0
1098765
0123
RL = 1.2, IL = 1.5A*
RL = 1.8, IL = 1A*
RL = 3.6, IL = 500mA*
INPUT VOLTAGE (V)
TJ = 25°C
V
SHDN
*FOR V
4
678910
5
= V
OUT
IN
= 1.8V
1963 G17
LT1963 GND Pin Current GND Pin Current vs I
100
90
80
70
60
50
40
30
GND PIN CURRENT (mA)
20
10
0
0123
RL = 0.81, IL = 1.5A*
RL = 1.21, IL = 1A*
RL = 2.42, IL = 500mA*
INPUT VOLTAGE (V)
TJ = 25°C
V
SHDN
*FOR V
4
678910
5
= V
OUT
IN
= 1.21V
1963 G20
100
90
80
70
60
50
40
30
GND PIN CURRENT (mA)
20
10
0
0123
RL = 1.67, IL = 1.5A*
RL = 2.5, IL = 1A*
RL = 5, IL = 500mA*
INPUT VOLTAGE (V)
TJ = 25°C
V
SHDN
*FOR V
4
678910
5
LOAD
= V
OUT
IN
= 2.5V
1963 G18
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
SHDN PIN THRESHOLD (V)
0.2
0.1
0
–50
6
SHDN Pin Threshold (On-to-Off)
IL = 1mA
–25
0
TEMPERATURE (°C)
50
25
75
100
1963 G22
125
SHDN Pin Threshold (Off-to-On)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
SHDN PIN THRESHOLD (V)
0.2
0.1
0
–50
–25
IL = 1.5A
0
TEMPERATURE (°C)
50
25
IL = 1mA
75
100
1963 G23
125
SHDN Pin Input Current
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
SHDN PIN INPUT CURRENT (µA)
0.5
0
0246
SHDN PIN VOLTAGE (V)
8
12 14 16 18 20
10
1963 G24
1963fa
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