SPX2920S-5-0/TR [SIPEX]
400mA Low Drop Out Voltage Regulator with Shutdown; 400毫安低压降稳压器，带有关断
| 型号： | SPX2920S-5-0/TR |
| 厂家： | 
SIPEX CORPORATION |
| 描述： | 400mA Low Drop Out Voltage Regulator with Shutdown |
| 文件： | 总10页 (文件大小：509K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SPX2920
400mA Low Drop Out Voltage Regulator with Shutdown
FEATURES
1.2V to 20V
1
7
8
+VIN
+VIN
VOUT
+
■ Output 3.3V, 5.0V, at 400mA Output
■ Very Low Quiescent Current
■ Low Dropout Voltage
100K
OFF
0.01µF
10µF
R1
FB
SPX2920
______
ERROR
SHUTDOWN
INPUT
ERROR
SD
3
5
OUTPUT
GND
4
VREF
■ Extremely Tight Load and Line Regulation
■ Very Low Temperature Coefficient
■ Current & Thermal Limiting
R2
ON
Adjustable Regulator
■ Error Flag Warns of Output Dropout
5V
VIN
IN
OUT
(for SO-8)
■ Logic-Controlled Electronic Shutdown
SPX2920
(for SO-8)
+
+
2.2 µF
0.1 µF
GND
■ Output Programmable from 1.24V to 20V
(for SO-8)
I
■ Equivalent Replacement for MIC2920A and
G
MIC2904
5V Regulator Circuit
Now Available in Lead Free Packaging
DESCRIPTION
The SPX2920 is a low power voltage regulator. This device is an excellent choice for use in battery-
powered applications such as cordless telephones, radio control systems, and portable computers.
The SPX2920 features very low quiescent current (140µATypical) and very low dropout voltage. This
includes a tight initial tolerance of 1% maximum and very low output temperature coefficient, making
the SPX2920 useful as a low-power voltage reference.
The error flag output feature is used as power-on reset for warning of a low output voltage, due to
a falling voltage input from batteries. Another feature is the logic-compatible shutdown input which
enables the regulator to be switched on and off. The SPX2920 is offered in 3-pin TO-220 package,
surface mount SO-8 (same pin out as SPX2951), SOT-223, and 3-pin TO-263 packages.
The regulator output voltage (of the SO-8) may be pin-strapped for a 3.3V and 5.0V or programmed
from 1.24V to 20V with an external pair of resistors.
8-Pin Surface Mount
TO-220-3 (U)
TO-263-3 (T)
SOT-223 (M3)
GND
GND
GND
VOUT
1
2
3
4
8
7
6
5
VIN
SPX2920
2
SPX2920
SENSE
FEEDBACK
5V/ 3.3V TAP
ERROR
1
3
SPX2920
SPX2920
1
3
2
SHUTDOWN
GND
1
2
3
VIN
VOUT
GND
VIN GND VOUT
VIN GND VOUT
Top View
Top View
Front View
Top View
Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
Power Dissipation ........................................................Internally Limited
Lead Temp. (Soldering, 5 Seconds).............................................. 260°C
Storage Temperature Range.........................................-65°C to +150°C
Operating Junction Temperature Range ......................-40°C to +125°C
Input Supply Voltage......................................................... -20V to +20V
Feedback Input Voltage..................................................... -1.5V to +20V
Shutdown Input Voltage .................................................... -0.3V to +20V
Error Comparator Output................................................... -0.3V to +20V
ESD Rating........................................................................................ 2kV
ELECTRICAL CHARACTERISTICS
Electrical characteristics at VIN =VO +1V, IO = 1mA, COUT = 2.2µF, TA = 25°C, unless otherwise specified. Boldface
applies over the full operating temperature range.
PARAMETER
CONDITIONS
(Note 2)
TYP
MIN
MAX
UNITS
3.3V Version
Output Voltage
3.3
3.267
3.333
V
1mA ≤ IL ≤ 400mA
1mA ≤ IL ≤ 400mA
3.3
3.217
3.382
5.0V Version
Output Voltage
5.0
4.950
5.050
V
5.0
4.880
5.120
All Voltage Options
Output Voltage
20
100
ppm/°C
Temperature Coefficient
Line Regulation (Note 4)
Load Regulation (Note 3)
(Note1)
6V ≤ VIN ≤ 20V
IL=1 to 400mA
1.5
5
20
20
mV
mV
30
Dropout Voltage (Note5)
IL=1mA
60
370
140
1.3
3.4
6
100
150
400
500
200
300
2
mV
IL=400mA
IL=1mA
Ground Current
µA
mA
mA
mA
IL=100mA
IL=250mA
IL=400mA
VOUT=0
2.5
9
12
15
25
Current Limit
800
0.2
mA
%/W
Thermal Regulation
Output Noise, 10Hz to 100kHz
IL=100mA
0.05
400
260
CL=10µF
µV Vrms
CL=100µF
Adjustable 8-Pin Version only
Reference Voltage
1.235
20
1.210
1.185
1.260
1.285
40
V
V
Reference Voltage
Over Temperature
Feedback Pin Bias Current
nA
60
Reference Voltage Temperature
Coefficient
20
ppm/°C
Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
2
ELECTRICAL CHARACTERISTICS
Electrical characteristics at VIN = VO+1V, IO = 1mA, COUT = 2.2µF, TA = 25°C, unless otherwise specified. Boldface
applies over the full operating temperature range.
PARAMETER
CONDITIONS
(Note 2)
TYP
MIN
MAX
UNITS
Feedback Pin Bias Current
Temperature Coefficient
Error Comparator
0.1
nA/°C
Output Leakage Current
V0UT=20V
0.01
150
60
1
µA
mV
mV
mV
mV
2
Output Low Voltage
VIN=4.5V
IOUT=400µA
(Note 6)
250
400
Upper Threshold Voltage
Lower Threshold Voltage
40
25
(Note 6)
(Note 6)
75
95
140
Hysteresis
15
Shutdown Input
Input Logic Voltage
1.3
Low (Regulator ON)
High (Regulator OFF)
VS=2.4V
0.7
V
2.0
Shutdown Pin Input Current
30
450
3
50
µA
100
600
750
VS=20V
(Note 7)
Regulator Output Current
in Shutdown
10
µA
20
Thermal Resistance Theta JA
TO-220-3
TO-263-3
NSOIC-8
SOT-223
29.4
31.4
ºC/W
128.4
62.3
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by
the total temperature range.
Note 2: Additional conditions for the 8-pin versions are feedback tied to 5V/3.3V tap and output tied to output sense
(VOUT = 5V) and VSHUTDOWN ≤ 0.8V.
Note3: Regulationismeasuredatconstantjunctiontemperature, usingpulsetestingwithalowdutycycle. Changes
in output voltage due to heating effects are covered under the specification for thermal regulation.
Note 4: Line regulation for the SPX2920 is tested at 150°C for IL = 1 mA. For TJ = 125°C, line regulation is guar-
anteed by design.
Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV
below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum
input supply voltage of 2V ( 2.3V over temperature) must be taken into account.
Note 6: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the
nominal reference voltage measured at 6V input. To express these thresholds in terms of output voltage change,
multiply by the error amplifier gain = VOUT/VREF = (R1 + R2)/R2. For example, at a programmed output voltage of
5V, the Error output is guaranteed to go low when the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds
remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below
nominal, 7.5% guaranteed.
Note 7: VSHUTDOWN ≥ 2V, VIN ≤ 20V, VOUT = 0, Feedback pin tied to 5V/3.3V Tap.
Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
3
BLOCK DIAGRAM
UNREGULATED DC
5V @ 400mA
MAX
1
7
8
+
2
..
180kΩ
+
_
6
ERROR
AMPLIFIER
3
FROM
TTL
330kΩ ..
+
60kΩ ..
5
+
1 uF
+
_
60 mV
ERROR DETECTION
COMPARATOR
TO CMOS OR
TTL
1.23V
+
4
REFERENCE
SPX2920-5.0 Block Diagram
APPLICATION HINTS
External Capacitors
1.23V output.
The stability of the SPX2920 requires a
2.2µF or greater capacitor between output
and ground. Oscillation could occur without
this capacitor. Most types of tantalum or
aluminum electrolytic capacitors work fine
here. For operations of below -25°C, solid
tantalum is recommended since many of the
aluminumtypeshaveelectrolytesthatfreeze
at about -30°C. The ESR of about 5Ω or less
and resonant frequency above 500kHz are
the most important parameters in the value
of the capacitor. The capacitor value can be
increased without limit.
The SPX2920, unlike other low dropout
regulators, will remain stable and in regula-
tion with no load in addition to the internal
voltage divider. This feature is especially
important in applications like CMOS RAM
keep-alive.
If there is more than 10 inches of wire be-
tween the input and the AC filter capacitor,
or if a battery is used as the input, then a
0.1µF tantalum or aluminum electrolytic
capacitor should be placed from the input
to the ground.
At lower values of output current, less output
capacitance is required for stability. For the
currentsbelow10mAthevalueofthecapaci-
tor can be reduced to 0.5µF and 0.15µF for
1mA. More output capacitance is needed
for the 8-pin version at voltages below 5V
since it runs the error amplifier at lower
gain. At worst case, 4.7µF or greater must
be used for the condition of 250mA load at
Instability can occur if there is stray capaci-
tancetotheSPX2920feedbackterminal(pin
7). This could cause more problems when
using a higher value of external resistors to
set the output voltage.
Thisproblemcanbefixedbyaddinga100pF
capacitor between output and feedback
and increasing the output capacitor to at
least 3.3µF.
Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
4
recommended load current of 1µAforces an
upper limit of 1.2MΩ on the value of R2. If no
load is presented, the I produces an error
of typically 2% in VOUT, FwBhich may be elimi-
nated at room temperature by trimming R1.
Toimprovetheaccuracychoosethevalueof
R2 = 100kΩ; this reduces the error by 0.17%
and increases the resistor program current
by12µA. SincetheSPX2920typicallydraws
60µA at no load with Pin 2 open-circuited,
this is a small price to pay.
Error Detection Comparator Output
TheComparatorproducesalogiclowoutput
whenever the SPX2920 output falls out of
regulation by more than about 5%. This is
around 60mV offset divided by the 1.235
referencevoltage. Thistriplevelremains5%
belownormalregardlessoftheprogrammed
output voltage of the regulator. Figure 1
shows the timing diagram depicting the ER-
ROR signal and the regulator output voltage
as the SPX2920 input is ramped up and
down. The ERROR signal becomes low at
around 1.3V input, and goes high around 5V
input (input voltage at which VOUT = 4.75V).
Since the SPX2920’s dropout voltage is
load dependent, the input voltage trip point
(around 5V) will vary with the load current.
The output voltage trip point (approximately
4.75V) does not vary with load.
Reducing Output Noise
It may be an advantage to reduce the AC
noise present at the output. One way is to
reduce the regulator bandwidth by increas-
ing the size of the output capacitor. This
is the only way that noise can be reduced
on the 3 lead SPX2920 but it is relatively
inefficient; as increasing the capacitor from
1µF to 220µF only decreases the noise
from 430µV to 160µV Vrms for a 100kHz
bandwidth at 5V output.
The error comparator has an open-col-
lector output, which requires an external
pull-up resistor. Depending on the system
requirements the resistor may be returned
to 5V output or other supply voltage. In
determining the value of this resistor, note
that the output is rated to sink 400µA; this
value adds to battery drain in a low battery
condition. Suggested values range from
100K to 1MΩ. If the output is unused this
resistor is not required.
Noise could also be reduced fourfold by
a bypass capacitor across R1, since it re-
duces the high frequency gain from 4 to
unity. Pick
CBYPASS ≅1 / 2πR1 x 200 Hz
or choose 0.01µF. When doing this, the
outputcapacitormustbeincreasedto3.3µF
to maintain stability. These changes reduce
the output noise from 430µV to 100µV Vrms
for a 100kHz bandwidth at 5V output. With
thebypasscapacitoradded,noisenolonger
scales with output voltage so that improve-
ments are more dramatic at higher output
4.75V
Programming the Output Voltage of
SPX2920
The SPX2920 may be pin-strapped for 5V
or 3.3V using its internal voltage divider by
tying Pin 1 (output) to Pin 2 (sense) and Pin
7 (feedback) to Pin 6 (5V/3.3V Tap).
Also, it may be programmed for any output
voltage between its 1.235V reference and
its 20V maximum rating. As seen on the
front page, an external pair of resistors is
required.
OUTPUT
VOLTAGE
_______
ERROR*
Refertotheequationbelowfortheprogram-
ming of the output voltage:
+
+
5.0V
INPUT
VOLTAGE
+
1.3V
+
VOUT = VREF x ( 1 + R1/ R2 )+ IFBR1
* See Application Info.
The VREF is 1.235 and IFB is the feedback
biascurrent,nominally-20nA. Theminimum
Figure 1. ERROR Output Timing
Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
5
PACKAGE: 3 PIN TO-220
Thermal
Pad
E
E2
øP
Q
(H1)
D2
D
D1
1
L1
FRONT
VIEW
b2
L
BACK
VIEW
e1
E1
e
b
Seating
Plane
A
3 Pin TO-220
JEDEC TO-220
Variation AB
Dimensions in Millimeters:
Conversion Factor:
A1
Dimensions in Inches:
Controlling Dimension
SYMBOL
1 Inch = 25.40 mm
MIN
0.140
0.020
0.080
0.015
0.045
0.014
0.560
0.330
0.480
0.380
0.270
-
NOM
-
-
-
0.027
0.057
-
-
-
-
-
-
MAX
0.190
0.055
0.115
0.040
0.070
0.024
0.650
0.355
0.507
0.420
0.350
0.030
MIN
3.56
0.51
2.03
0.25
1.14
0.25
14.22
8.38
12.19
9.65
6.86
-
NOM
-
-
-
0.51
1.45
-
-
-
-
-
-
MAX
4.83
1.27
2.79
1.02
1.78
0.51
16.51
8.89
12.70
10.67
8.89
0.76
H1
A
A1
A2
b
b2
c
SIDE
VIEW
Chamfer
Optional
D
D1
D2
E
E1
E2
e
-
-
.100 BSC
2.54 BSC
e1
H1
L
L1
ΦP
Q
.200 BSC
5.08 BSC
0.230
0.500
-
0.139
0.100
-
-
-
-
-
0.270
0.580
0.250
0.161
0.135
5.84
12.70
-
3.30
2.54
-
-
-
-
-
6.86
14.73
6.35
4.06
3.30
C
A2
SIPEX Pkg Signoff Date/Rev:
JL Aug4-05 / Rev A
Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
6
PACKAGE: 3 PIN TO-263
E
Seating
Plane
A
E/2
C2
L1
SIDE VIEW
H
D
Chamfer
Optional
1
2
3
c
e
See Detail C
b
b2
Gauge Plane
Seating
Plane
FRONT VIEW
θ
L3
A1
L
DETAIL C
Thermal
Pad
3 Pin TO-263 JEDEC TO-263
Variation AA
Millimeters
Conversion Factor:
1 Inch = 25.40 mm
(L1)
Inches
Controlling Dimension
SYMBOL
MIN
NOM
-
-
-
-
-
-
-
MAX
0.190
0.010
0.039
0.070
0.029
0.065
0.380
-
MIN
4.06
0.00
0.51
1.14
0.38
1.14
8.38
6.86
9.65
6.22
NOM
-
-
-
-
-
-
-
MAX
D1
A
A1
b
b2
c
c2
D
D1
E
0.160
0.000
0.020
0.045
0.015
0.045
0.330
0.270
0.380
0.245
4.83
0.25
0.99
1.78
0.74
1.65
9.65
-
-
-
-
-
-
-
0.420
-
10.67
-
E1
e
.100 BSC
2.54 BSC
H
L
L1
L3
O
0.575
0.070
-
-
-
-
0.625
0.110
0.066
14.61
1.78
-
-
-
-
15.88
2.79
1.68
BACK
VIEW
.010 BSC
-
0.25 BSC
-
0˚
8˚
0˚
8˚
E1
SIPEX Pkg Signoff Date/Rev:
JL Aug5-05 / Rev A
Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
7
PACKAGE: 3 PIN SOT-223
D
b2
E
E1
3
2
1
e
e1
TOP VIEW
b
Gauge Plane
A2
A
L2
c
A1
ø
L
Seating Plane
FRONT VIEW
3 Pin SOT-223
JEDEC TO-261
Variation AA
Inches
Conversion Factor:
1 Inch = 25.40 mm
Millimeters
Controlling Dimension
SYMBOL
MIN
-
NOM
-
-
1.60
0.76
3.00
0.30
6.50
7.00
3.50
MAX
MIN
-
NOM
-
-
0.063
0.030
0.118
0.012
0.256
0.276
0.138
MAX
0.071
0.004
0.067
0.033
0.122
0.014
0.264
0.287
0.146
A
A1
A2
b
b2
c
D
E
E1
e
e1
L
1.80
0.10
1.70
0.84
3.10
0.35
6.70
7.30
3.70
0.02
1.50
0.66
2.90
0.23
6.30
6.70
3.30
0.001
0.060
0.026
0.114
0.010
0.248
0.264
0.130
2.30 BASIC
4.60 BASIC
-
0.25 BASIC
-
0.091 BASIC
0.182 BASIC
-
0.010 BASIC
-
0.75
0º
-
0.030
0º
-
L2
ø
10º
10º
SIPEX Pkg Signoff Date/Rev:
JL Aug8-05/Rev A
Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
8
PACKAGE: 8 PIN NSOIC
D
D/2
SIDE VIEW
A2
7
8
5
6
A
E/2
E1/2
A1
Seating Plane
E
E1
4
2
3
1
(L1)
Pin1 Designator
to be within this
INDEX AREA
(D/2 x E1/2)
e
b
TOP VIEW
h
ø1
FRONT VIEW
Gauge Plane
ø2
h
R1
R
L2
ø1
c
Seating
Plane
ø
L
8 Pin NSOIC
JEDEC MS-012
Variation AA
Dimensions in Inches
Conversion Factor:
1 Inch = 25.40 mm
Dimensions in Millimeters:
Controlling Dimension
SYMBOL
MIN
NOM
MAX
MIN
NOM
MAX
A
1.35
0.10
1.25
0.31
0.17
-
-
-
-
1.75
0.25
1.65
0.51
0.25
0.053
0.004
0.049
0.012
0.007
-
-
-
-
0.069
0.010
0.065
0.020
0.010
A1
A2
b
c
-
-
E
E1
e
6.00 BSC
3.90 BSC
1.27 BSC
0.236 BSC
0.154 BSC
0.050 BSC
h
L
0.25
0.40
0.50
1.27
0.010
0.016
-
-
0.020
0.050
-
L1
L2
R
R1
ø
1.04 REF
0.25 BSC
0.041 REF
0.010 BSC
0.07
0.07
0º
5º
0º
-
-
-
-
-
-
0.003
0.003
0º
5º
0º
-
-
-
-
-
-
8º
15º
-
8º
15º
-
ø1
ø2
-
-
D
4.90 BSC
0.193 BSC
SIPEX Pkg Signoff Date/Rev:
JL Aug16-05 / Rev A
Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
9
ORDERING INFORMATION
Ordering No.
Accuracy
1%
Output Voltage
Packages
SPX2920M3-3-3
SPX2920M3-3-3/TR
SPX2920M3-5-0
SPX2920M3-5-0/TR
SPX2920S-3-3
3.3V
3.3V
5.0V
5.0V
3.3V
3.3V
5.0V
5.0V
3.3V
3.3V
5.0V
5.0V
3.3V
5.0V
3-Pin SOT-223
3-Pin SOT-223
3-Pin SOT-223
3-Pin SOT-223
8-Pin NSOIC
8-Pin NSOIC
8-Pin NSOIC
8-Pin NSOIC
3-Pin TO-263
3-Pin TO-263
3-Pin TO-263
3-Pin TO-263
3-Pin TO-220
3-Pin TO-220
1%
1%
1%
1%
SPX2920S-3-3/TR
SPX2920S-5-0
1%
1%
SPX2920S-5-0/TR
SPX2920T-3-3
1%
1%
SPX2920T-3-3/TR
SPX2920T-5-0
1%
1%
SPX2920T-5-0/TR
SPX2920U-3-3
SPX2920U-5-0
1%
1%
1%
Available in lead free packaging. To order add "-L" suffix to part number.
Example: SPX2920T-3-3/TR = standard; SPX2920T-L-3-3/TR = lead free
/TR = Tape and Reel
Pack quantity is 500 for TO-263 and 2,500 for SOT-223 and NSOIC.
Sipex Corporation
Headquarters and
Sales Office
233 South Hillview Drive
Milpitas, CA 95035
TEL: (408) 934-7500
FAX: (408) 935-7600
Solved by Sipex
TM
Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume
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Date: 03/02/06
SPX2920 400mA Low Drop Out Voltage Regulator with Shutdown
©Copyright 2006 Sipex Corporation
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