PSSI2021SAY [NEXPERIA]
Constant current source in SOT353 packageProduction;
| 型号： | PSSI2021SAY |
| 厂家： | 
Nexperia |
| 描述： | Constant current source in SOT353 packageProduction 光电二极管 |
| 文件： | 总13页 (文件大小：182K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Important notice
Dear Customer,
On 7 February 2017 the former NXP Standard Product business became a new company with the
tradename Nexperia. Nexperia is an industry leading supplier of Discrete, Logic and PowerMOS
semiconductors with its focus on the automotive, industrial, computing, consumer and wearable
application markets
In data sheets and application notes which still contain NXP or Philips Semiconductors references, use
the references to Nexperia, as shown below.
Instead of http://www.nxp.com, http://www.philips.com/ or http://www.semiconductors.philips.com/,
use http://www.nexperia.com
Instead of sales.addresses@www.nxp.com or sales.addresses@www.semiconductors.philips.com, use
salesaddresses@nexperia.com (email)
Replace the copyright notice at the bottom of each page or elsewhere in the document, depending on
the version, as shown below:
- © NXP N.V. (year). All rights reserved or © Koninklijke Philips Electronics N.V. (year). All rights
reserved
Should be replaced with:
- © Nexperia B.V. (year). All rights reserved.
If you have any questions related to the data sheet, please contact our nearest sales office via e-mail
or telephone (details via salesaddresses@nexperia.com). Thank you for your cooperation and
understanding,
Kind regards,
Team Nexperia
PSSI2021SAY
Constant current source in SOT353 package
Rev. 03 — 27 August 2009
Product data sheet
1. Product profile
1.1 General description
Resistor-equipped PNP transistor with two diodes on one chip in a SOT353 (SC-88A)
plastic package. Stabilized output current of between 15 µA and 50 mA by connection of
an external resistor between pins 4 and 5.
1.2 Features
I One chip integrated constant current source
I Output current setting by use of an external resistor
I Very small package
I Reduces component count and board space
1.3 Applications
I Automotive applications
I Generic constant current source
I Constant current LED driver
I Active bias control for audio amplifiers
1.4 Quick reference data
Table 1.
Symbol
Iout
Quick reference data
Parameter
Conditions
Min
0.015
-
Typ
Max
50
Unit
mA
V
output current
-
-
VS
supply voltage
75
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
2. Pinning information
Table 2.
Pinning
Symbol Description
Pin
1
Simplified outline
Symbol
n.c.
not connected
output current
ground
5
4
5
4
2
IOUT
GND
REXT
VS
3
4
external resistor
supply voltage
1
2
3
n.c.
1
5
2
3
sym049
3. Ordering information
Table 3.
Ordering information
Type number
Package
Name
Description
Version
PSSI2021SAY
SC-88A
plastic surface mounted package; 5 leads
SOT353
4. Marking
Table 4.
Marking codes
Type number
PSSI2021SAY
Marking code[1]
S1*
[1] * = -: made in Hong Kong
* = t: made in Malaysia
* = W: made in China
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
2 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
5. Limiting values
Table 5.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Iout
Parameter
Conditions
Min
Max
50
Unit
mA
V
stabilized output current
supply voltage
see Figure 2
0.015
VS
-
75
Vout
VR
output voltage
VS = 75 V
-
73
V
[1]
[2]
reverse voltage
-
0.5
V
Ptot
total power dissipation
storage temperature
junction temperature
ambient temperature
Tamb ≤ 25 °C
-
335
+150
150
+150
mW
°C
°C
°C
Tstg
Tj
−65
-
Tamb
−65
[1] Between all terminals
[2] Device mounted on a FR4 printed-circuit board, single-sided copper, tin-plated, standard footprint
6. Thermal characteristics
Table 6.
Thermal characteristics
Symbol
Parameter
Conditions
Min
Typ
Max Unit
370 K/W
[1]
Rth(j-a)
thermal resistance from
junction to ambient
in free air
-
-
[1] Device mounted on a FR4 printed-circuit board, single-sided copper, tin-plated, standard footprint
7. Characteristics
Table 7.
Characteristics
Tamb = 25 °C unless otherwise specified
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Iout
stabilized output current
VS = 12 V; Rext = open;
10
15
20
µA
Vout = 0 V to 10 V;
see Figure 2
IS
supply current
VS = 12 V; Iout = 15 µA;
-
240
370
µA
Vout = 0 V to 10 V;
see Figure 4
VS = 75 V; Iout = 15 µA;
-
-
-
-
1.5
0.15
0.5
48
2.2
mA
%/K
%
Vout = 0 V; see Figure 4
∆Iout / (Iout × ∆Tamb
∆Iout / Iout
)
output current change over VS = 12 V; Vout = 1 V;
-
-
-
ambient temperature
T
amb = −55 °C to 150 °C
VS = 12 V;
out = 1 V to 10 V
load stability of stabilized
output current
V
Rint
internal resistor value
kΩ
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
3 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
006aaa020
006aaa021
2
2
10
10
I
I
out
out
(1)
(2)
(mA)
(mA)
(1)
10
(2)
10
(3)
(3)
1
1
(4)
(5)
−1
(4)
(5)
−1
10
10
(6)
(6)
−2
−2
10
10
2
3
4
10
10
10
10
0
20
40
60
80
R
L
(Ω)
V
(V)
S
V
S = 12 V
(1)
(2)
(3)
(4)
(5)
(6)
I
I
I
I
I
I
out = 20 mA
(1)
(2)
(3)
(4)
(5)
(6)
I
I
I
I
I
I
out = 20 mA
out = 10 mA
out = 1mA
out = 10 mA
out = 1mA
out = 100 µA
out = 50 µA
out = 15 µA
out = 100 µA
out = 50 µA
out = 15 µA
Fig 1. Output current as a function of load
resistance; typical values
Fig 2. Output current as a function of supply voltage;
typical values
006aaa022
006aaa023
2
10
2.0
I
out
I
S
(mA)
(mA)
10
1.5
1
1.0
0.5
0
−1
10
−2
10
2
3
4
5
6
10
10
10
10
10
10
(Ω)
0
20
40
60
80
R
V
(V)
ext
S
VS = 12 V; RL = 100 Ω
Rext = ∞; RL = 100 Ω
Fig 3. Output current as a function of external
resistance; typical values
Fig 4. Supply current as a function of supply voltage;
typical values
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
4 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
8. Application information
External resistor calculation
The output current can be set by connecting an external resistor between VS (pin 5) and
REXT (pin 4).
0.617
Rext
Iout then calculates to:
Iout
=
+ 15 µA
------------
Without an external resistor the output current will be typically 15 µA.
Typical output currents versus supply voltage VS
The applied supply voltage determines the output current. Table 8 gives typical Iout values
at specified supply voltages, assuming that the working output current is 70% of the
maximum possible output current.
Table 8.
VS (V)
5
Typical output currents at specified supply voltages
Iout (mA)
6
12
18
38
60
24
36
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
5 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
8.1 Typical application circuits
LED driver
Figure 5 shows a typical application circuit for an LED driver. The constant current
ensures a constant LED brightness.
VS
V
CC
R
ext
REXT
IOUT
I
out
LED
GND
006aaa024
Fig 5. LED driver application diagram
Switching the current ON/OFF
The output can be switched ON and OFF by connecting a resistor-equipped transistor
(RET, e.g. PDTC124XU) as shown in Figure 6.
VS
V
CC
R
ext
REXT
IOUT
GND
GND
I
out
OUT
IN/
OUT
LED
006aaa025
Fig 6. Switching the current ON/OFF; application diagram
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
6 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
Voltage reference
The PSSI2021SAY supplies a constant current to the Zener diode regardless of supply
voltage variation, resulting in a constant reference voltage (see Figure 7).
VS
V
CC
R
ext
REXT
IOUT
V
ref
I
out
GND
006aaa026
Fig 7. Voltage reference application diagram
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
7 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
9. Package outline
Plastic surface-mounted package; 5 leads
SOT353
D
B
E
A
X
y
H
v
M
A
E
5
4
Q
A
A
1
1
2
3
c
e
1
b
p
L
p
w
M B
e
detail X
0
1
2 mm
scale
DIMENSIONS (mm are the original dimensions)
A
1
(2)
UNIT
A
b
c
D
E
e
e
H
L
Q
v
w
y
p
p
1
E
max
0.3
0.2
1.1
0.8
0.25
0.10
2.2
1.8
1.35
1.15
2.2
2.0
0.45
0.15
0.25
0.15
mm
0.1
1.3
0.65
0.2
0.2
0.1
REFERENCES
JEDEC JEITA
EUROPEAN
PROJECTION
OUTLINE
VERSION
ISSUE DATE
IEC
04-11-16
06-03-16
SC-88A
SOT353
Fig 8. Package outline SOT353 (SC-88A)
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
8 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
10. Packing information
Table 9.
Packing methods
The indicated -xxx are the last three digits of the 12NC ordering code.[1]
Type number
Package
Description
Packing quantity
3000
PSSI2021SAY
SOT353
4 mm pitch, 8 mm tape and reel
-115
[1] For further information and the availability of packing methods, see Section 13.
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
9 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
11. Revision history
Table 10. Revision history
Document ID
PSSI2021SAY_3
Modifications:
Release date
20090827
Data sheet status
Change notice
Supersedes
Product data sheet
-
PSSI2021SAY_2
• This data sheet was changed to reflect the new company name NXP Semiconductors,
including new legal definitions and disclaimers. No changes were made to the technical
content.
• Table 2 “Pinning”: amended
• Figure 8 “Package outline SOT353 (SC-88A)”: updated
PSSI2021SAY_2
PSSI2021SAY_1
20041020
Product data sheet
-
PSSI2021SAY_1
-
20010507
Product specification
-
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
10 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
12. Legal information
12.1 Data sheet status
Document status[1][2]
Product status[3]
Development
Definition
Objective [short] data sheet
This document contains data from the objective specification for product development.
This document contains data from the preliminary specification.
This document contains the product specification.
Preliminary [short] data sheet Qualification
Product [short] data sheet Production
[1]
[2]
[3]
Please consult the most recently issued document before initiating or completing a design.
The term ‘short data sheet’ is explained in section “Definitions”.
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
damage. NXP Semiconductors accepts no liability for inclusion and/or use of
NXP Semiconductors products in such equipment or applications and
therefore such inclusion and/or use is at the customer’s own risk.
12.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) may cause permanent
damage to the device. Limiting values are stress ratings only and operation of
the device at these or any other conditions above those given in the
Characteristics sections of this document is not implied. Exposure to limiting
values for extended periods may affect device reliability.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Terms and conditions of sale — NXP Semiconductors products are sold
subject to the general terms and conditions of commercial sale, as published
at http://www.nxp.com/profile/terms, including those pertaining to warranty,
intellectual property rights infringement and limitation of liability, unless
explicitly otherwise agreed to in writing by NXP Semiconductors. In case of
any inconsistency or conflict between information in this document and such
terms and conditions, the latter will prevail.
12.3 Disclaimers
General — Information in this document is believed to be accurate and
reliable. However, NXP Semiconductors does not give any representations or
warranties, expressed or implied, as to the accuracy or completeness of such
information and shall have no liability for the consequences of use of such
information.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
grant, conveyance or implication of any license under any copyrights, patents
or other industrial or intellectual property rights.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from national authorities.
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in medical, military, aircraft,
space or life support equipment, nor in applications where failure or
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
12.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
13. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
PSSI2021SAY_3
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 03 — 27 August 2009
11 of 12
PSSI2021SAY
NXP Semiconductors
Constant current source in SOT353 package
14. Contents
1
Product profile . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1
1.2
1.3
1.4
General description. . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Quick reference data. . . . . . . . . . . . . . . . . . . . . 1
2
Pinning information. . . . . . . . . . . . . . . . . . . . . . 2
Ordering information. . . . . . . . . . . . . . . . . . . . . 2
Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 3
Thermal characteristics. . . . . . . . . . . . . . . . . . . 3
Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 3
Application information. . . . . . . . . . . . . . . . . . . 5
Typical application circuits . . . . . . . . . . . . . . . . 6
Package outline . . . . . . . . . . . . . . . . . . . . . . . . . 8
Packing information. . . . . . . . . . . . . . . . . . . . . . 9
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 10
3
4
5
6
7
8
8.1
9
10
11
12
Legal information. . . . . . . . . . . . . . . . . . . . . . . 11
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 11
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 11
12.1
12.2
12.3
12.4
13
14
Contact information. . . . . . . . . . . . . . . . . . . . . 11
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2009.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Date of release: 27 August 2009
Document identifier: PSSI2021SAY_3
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