LP2985-30D-G [NXP]
IC VREG 3 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PDSO5, 1.60 MM, PLASTIC, MO-178, SOT-25, SOT-23, SOP-5, Fixed Positive Single Output LDO Regulator;
| 型号： | LP2985-30D-G |
| 厂家： | 
NXP |
| 描述： | IC VREG 3 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PDSO5, 1.60 MM, PLASTIC, MO-178, SOT-25, SOT-23, SOP-5, Fixed Positive Single Output LDO Regulator 光电二极管 输出元件 调节器 |
| 文件： | 总13页 (文件大小：140K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
LP2985-XX
Micropower 150 mA low noise,
low dropout linear regulator
Product data
2003 Oct 31
Supersedes data of 2003 Oct 17
Philips
Semiconductors
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
GENERAL DESCRIPTION
The LP2985-XX is a 150 mA, fixed output voltage regulator designed
to provide very low dropout and low noise in battery powered and
portable applications. The output voltage is preset to 1.5, 1.8, 2.8,
3.0, 3.3, 3.6, or 5.0 V.
Designed with an optimized PNP process, the LP2985-XX achieves
unequalled performance in all specifications critical to
battery-powered designs such as low supply-current, low dropout
voltage, low power consumption, small size, fast dynamic response
to line and load, precision output, etc. This regulator consists of an
internal voltage reference, an error amplifier, a driver with current
limiter and a thermal shut-down mechanism.
The LP2985-XX is housed in a small outline 5-lead package
(SOT23-5/SOP003).
FEATURES
APPLICATIONS
• Very low consumption current: 85 mA typ. (when not loaded),
• Cellular phones, cordless phones, and 2-way radios
• Electronic notebooks, PDAs and palmtop computers
• Cameras, VCRs and camcorders
• PCMCIA cards
0.1 mA max. (when off)
• Very low dropout voltage: 100 mV typ. (I
• High precision output voltage: ±2%
• Output current capacity: 150 mA
= 50 mA)
OUT
• Modems
• Low noise: 30 mVRMS @ 20 Hz to 80 kHz (C = 10 nF)
n
• Battery-powered or hand-held instruments
• Good line regulation: 0.01%/V typ.
• Good load regulation: 30 mV typ. (I
= 1 to 150 mA)
OUT
• Low temperature drift co-efficient to V
: ±100 ppm/°C
OUT
• Built-in current limit and thermal shut-down
• Wide operating temperature range: –40 to +85 °C
• Preset output voltages: 1.5, 1.8, 2.5, 2.8, 3.0, 3.3, 3.6, or 5.0 V
SIMPLIFIED DEVICE DIAGRAM
LP2985-XX
V
1
3
IN
5
V
OUT
BIAS
CURRENT
LIMIT
ON/OFF
DRIVER
REFERENCE
NOISE
GND
4
2
THERMAL
SHUTDOWN
SL01545
Figure 1. Simplified device diagram.
2
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
TEMPERATURE
RANGE
DESCRIPTION
VERSION
SOP003
LP2985-XXD
Plastic small outline package; 5 leads; body width 1.6 mm
–40 to +85 °C
NOTE:
Part number marking
The device has eight voltage output options, indicated by the XX on
the Type Number.
Each device is marked with a four letter code. The first three letters
designate the product. The fourth letter, represented by ‘x’, is a date
tracking code.
XX
15
18
25
28
30
33
36
50
VOLTAGE (Typical)
Part number
LP2985-15D
LP2985-18D
LP2985-25D
LP2985-28D
LP2985-30D
LP2985-33D
LP2985-36D
LP2985-50D
Marking
A N L x
A A B x
A S J x
A A C x
A B G x
A B H x
A N B x
A B J x
1.5 V
1.8 V
2.5 V
2.8 V
3.0 V
3.3 V
3.6 V
5.0 V
PIN CONFIGURATION
PIN DESCRIPTION
PIN SYMBOL
DESCRIPTION
1
2
3
4
V
Voltage input.
IN
1
2
3
5
V
OUT
V
IN
GND
Device ground.
ON/OFF
NOISE
ON/OFF control pin. Connect to V if not used.
IN
GND
Noise decrease pin, for connecting external
capacitor.
4
NOISE
ON/OFF
5
V
OUT
Voltage output.
SL01544
Figure 2. Pin configuration.
MAXIMUM RATINGS
SYMBOL
PARAMETER
MIN.
–0.3
–40
–40
–
MAX.
+12.0
+85
UNIT
V
V
Supply voltage
IN
T
Operating temperature
Storage temperature
Power dissipation
°C
oper
T
stg
+150
150
°C
P
D
mW
3
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
ELECTRICAL CHARACTERISTICS
T
amb
= 25 °C, V = V
+ 1 V, V = 2.0 V, unless otherwise specified.
IN
OUT(nom)
ON/OFF
SYMBOL
PARAMETER
No-load input current
CONDITIONS
MIN.
–
TYP.
85
0
MAX.
130
0.1
UNIT
µA
I
I
= 0 mA
CC
OUT
I
Standby input current
Output voltage
V
–
µA
CC(OFF)
ON/OFF
98
–
102
1.53
1.836
2.55
2.856
3.060
3.366
3.672
5.100
0.2
% V
nom
V
OUT
LP2885-15
LP2885-18
LP2885-25
LP2885-28
LP2885-30
LP2885-33
LP2885-36
LP2885-50
1.47
1.764
2.45
2.744
2.940
3.234
3.528
4.900
–
1.5
1.8
2.5
2.8
3.0
3.3
3.6
5.0
0.1
10
30
100
70
60
30
5
V
V
V
V
V
V
V
V
V
–V
OUT
Dropout voltage
Line regulation
Load regulation
V
V
= V
= V
+ 1 to 10 V
+ 1 to 10 V
V
IN
IN
OUT(typ)
OUT(typ)
∆V
∆V
∆V
–
20
mV
mV
ppm/°C
dB
dB
LNR
IN
I
= 1 to 150 mA
–
90
LDR
OUT
OUT
/∆T
V
OUT
temperature coefficient
–30 °C ≤ T ≤ +85 °C
–
–
j
RR1
RR2
Ripple rejection 1
f = 120 Hz; V
= 1 V
50
–
ripple
Ripple rejection 2
f = 1 kHz; C = 0.01 µF; V
= 1 V
–
–
n
ripple
V
Output noise voltage
f
= 20 Hz to 80 kHz; C = 0.01 µF
–
–
µV
RMS
n
BW
n
I
ON/OFF pin input current
ON/OFF low threshold voltage
ON/OFF high threshold voltage
V
= 5.0 V
–
15
µA
ON/OFF
ON/OFF
V
V
–0.3
1.6
–
0.4
V
OFF
–
V
+ 0.3
V
ON
IN
4
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
TYPICAL PERFORMANCE CURVES
2.8 V product. Except where noted otherwise, T
= 25 °C; V = V + 1 V; V
= 2 V; C = 1 µF; C = 1 µF; C = 0.01 µF.
amb
IN
o
cont
i
o
n
3.5
3.0
2.5
2.0
1.5
1.5
1.0
0.5
R
= ∞
L
R
R
R
= 2.8 kΩ
= 93 Ω
= 19 Ω
1.0
0.5
0.0
L
L
L
0.0
0
2
4
6
8
10
12
SL02130
0
2
4
6
8
10
12
SL02131
V
, INPUT VOLTAGE (V)
V , INPUT VOLTAGE (V)
IN
IN
Figure 3. Output voltage versus input voltage.
Figure 4. Input current versus input voltage.
2.845
2.840
2.835
2.90
R
= 2.8 kΩ
L
2.85
2.80
2.75
2.70
2.830
2.825
0
50
100
150
200
250
300
SL02132
2
4
6
8
10
12
SL02133
I , OUTPUT CURRENT (mA)
O
V , INPUT VOLTAGE (V)
IN
Figure 5. Load regulation.
Figure 6. LIne regulation.
0.5
0.4
0.3
2.90
2.85
V
= 2.6 V
R = 2.8 kΩ
L
IN
2.80
2.75
2.70
0.2
0.1
0
0
50
100
150
200
250
SL02134
–50
–25
0
25
50
75
100
125
150
I
O
, OUTPUT CURRENT (mA)
AMBIENT TEMPERATURE, T
(°C)
amb
SL02135
Figure 7. Dropout voltage versus output current.
Figure 8. Output voltage versus T
.
amb
5
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
TYPICAL PERFORMANCE CURVES (continued)
2.8 V product. Except where noted otherwise, T
= 25 °C; V = V + 1 V; V
= 2 V; C = 1 µF; C = 1 µF; C = 0.01 µF.
cont i o n
amb
IN
o
0
–10
–20
–30
0
–10
–20
–30
C
= 0.01 µF
C = 0 µF
n
n
I
O
O
= 150 mA
= 100 mA
= 30 mA
I
O
O
= 150 mA
= 100 mA
= 30 mA
I
I
1
1
O
O
–40
–50
–40
–50
–60
–70
–60
–70
–80
–80
0.01
0.1
1
10
100
1000
SL02136
0.01
0.1
1
10
100
1000
SL02137
f, FREQUENCY (kHz)
f, FREQUENCY (kHz)
Figure 9. Ripple rejection (C = 0.01 µF).
Figure 10. Ripple rejection (C = 0 µF).
n
n
30
200
150
25
20
15
10
100
50
0
5
0
0
50
100
150
200
250
SL02138
0.00001
0.0001
0.001
0.01
0.1
SL02139
I
O
, OUTPUT CURRENT (mA)
C , NOISE REDUCTION CAPACITOR (µF)
n
Figure 11. GND pin current.
Figure 12. Output noise voltage.
10
10
C = C = 1 µF
C = C = 0.47 µF
i
o
i
o
1
1
STABLE AREA
STABLE AREA
0.1
0.1
0.01
0.01
0
50
100
150
200
250
SL02140
0
50
100
I , OUTPUT CURRENT (mA)
O
150
200
250
SL02141
I
O
, OUTPUT CURRENT (mA)
Figure 13. ESR stability area (C = C = 1 µF).
Figure 14. ESR stability area (C = C = 0.47 µF).
i o
i
o
6
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
TYPICAL PERFORMANCE CURVES (continued)
2.8 V product. Except where noted otherwise, T
= 25 °C; V = V + 1 V; V
= 2 V; C = 1 µF; C = 1 µF; C = 0.01 µF.
amb
IN
o
cont
i
o
n
C = C = 0.47 µF, C = 0.01 µF
C = C = 1 µF, C = 0.01 µF
i
o
n
i
o
n
CH2=50mV
AC 10 : 1
CH2=50mV
AC 10 : 1
CH1=10mV
DC 1 : 1
CH1=10mV
DC 1 : 1
10 µs/div
10 µs/div
100 mA
GND
100 mA
GND
I : 50 mA/div
O
I : 50 mA/div
O
V : 50 mV/div
o
V : 50 mV/div
o
SL02142
SL02143
Figure 15. Load transient response
Figure 16. Load transient response
(I = 0 → 100 mA); (C = C = 0.47 µF; C = 0.01 µF).
(I = 0 → 100 mA); (C = C = 1 µF; C = 0.01 µF).
O
i
o
n
O
i
o
n
C =0, C = 1 µF, C = 0.01 µF
C =0, C = 0.47 µF, C = 0.01 µF
i
o
n
i
o
n
CH2=20mV
AC 10 : 1
CH2=20mV
AC 10 : 1
CH1=2v
DC 1 : 1
CH1=2V
DC 1 : 1
10 µs/div
10 µs/div
4 V
4 V
V
: 2 V/div
V : 2 V/div
IN
IN
GND
GND
V : 20 mV/div
o
V : 20 mV/div
o
SL02144
SL02145
Figure 17. Line transient response
(V = 3.8 → 4.8 V; I = 30 mA);
Figure 18. Line transient response
(V = 3.8 → 4.8 V; I = 30 mA);
IN
O
IN
O
(C = 0; C = 1 µF; C = 0.01 µF).
(C = 0; C = 0.47 µF; C = 0.01 µF).
i o n
i
o
n
V
= V
cont
= 0 → 3.8 V; I = 30 mA
V
= 3.8 V; V
= 0 → 3.8 V; I = 30 mA
IN
O
IN
cont
O
CH2=2V
DC 10 : 1
CH2=2V
DC 10 : 1
CH1=2V
DC 10 : 1
CH1=2V
DC 10 : 1
100 µs/div
100 µs/div
4 V
4 V
V
, Cont: 2 V/div
Cont: 2 V/div
IN
GND
4 V
GND
4 V
V : 2 V/div
o
V : 2 V/div
o
GND
GND
SL02146
SL02147
Figure 19. Turn-on transient response
= V = 0 → 3.8 V; I = 30 mA)
Figure 20. Turn-on transient response
V = 3.8 V; V = 0 → 3.8 V; I = 30 mA)
in
V
in
cont
O
cont
O
7
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
output voltage. If the feedback voltage is too high, the pass
transistor gate is pulled up, allowing less current to pass to the
output, resulting in a decrease in output voltage.
TECHNICAL DISCUSSION
As illustrated in Figure 21, the LP2985-XX consists of a band-gap
voltage reference, an error amplifier, P-channel pass transistor,
current limit circuit and an internal feedback voltage divider. The
output voltage is fed back through an internal resistor voltage divider
An external bypass capacitor connected to the NOISE pin reduces
noise at the output.
connected to the V
pin.
OUT
Additional functional blocks include a current-limiter, thermal sensor
and shut-down logic. The current-limiter monitors and controls the
pass-transistor’s gate voltage, limiting the output current to its
specified maximum value. Thus it can withstand a short-circuited
output for an indefinite amount of time without damaging the part.
The reference is connected to the error amplifier’s inverting input.
The error amplifier compares the reference with the feedback
voltage and amplifies the difference. If the feedback voltage is lower
than the reference voltage, the pass transistor’s gate is pulled lower,
which allows more current to pass to the output and increase the
LP2985-XX
V
1
3
IN
5
V
OUT
BIAS
CURRENT
LIMIT
ON/OFF
DRIVER
REFERENCE
NOISE
GND
4
2
THERMAL
SHUTDOWN
SL01545
Figure 21. Block diagram.
8
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
good frequency characteristics is needed. Set it as close to the
APPLICATION INFORMATION
The following points have to be kept in mind for good performance
while using these devices:
circuit as possible and make the wiring as short as possible. The
value of the output capacitance must be at least 1 µF and must have
B-type temperature characteristics. Also it must have the ESR
(Equivalent Series Resistance) value within the stable range shown
Input Capacitor
in the ESR versus I plot.
An input capacitor of greater than 1 µF is required between the
LP2985-XX input pin and the circuit ground (the amount of
capacitance may be increased without limit). This capacitor must be
O
ON/OFF (Chip Enable) Pin
The ON/OFF pin must be actively terminated, not floating. If the
located as close as possible to the V or GND pin (not more than
IN
function is not to be used, the pin should be tied to V
.
IN
1 cm away from the pin) and returned to a clean analog ground.
Any good quality ceramic, tantalum, or film capacitor will work.
Line Impedance of VIN and GND
The V and GND lines should be sufficiently wide to minimize
Output Capacitor
Phase compensation is used for securing stable operation even if
the load current varies. For this reason, an output capacitor with
IN
impedance. If the impedance of these lines is high, there is a
chance to pick up noise or malfunction.
OUTPUT VOLTAGE
1 µF
0.01 µF
5
4
V
NOISE
OUT
V
ON/OFF
3
GND
2
IN
1
SUPPLY VOLTAGE
1 µF
SL01546
Figure 22. Typical application circuit, device always ON.
TEST CIRCUITS
A
V
1 µF
TEST LOAD
0.01 µF
5
4
V
NOISE
OUT
V
ON/OFF
3
GND
2
IN
1
A
A
SUPPLY VOLTAGE
1 µF
SL01547
Figure 23. Test circuit.
9
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
PACKING METHOD
The LP2985-XX is packed in reels, as shown in Figure 24.
GUARD
BAND
TAPE
TAPE DETAIL
REEL
ASSEMBLY
COVER TAPE
CARRIER TAPE
BARCODE
LABEL
BOX
SL01305
Figure 24. Tape and reel packing method
10
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
Plastic small outline package; 5 leads; body width 1.6 mm
SOP003
11
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
REVISION HISTORY
Rev
Date
Description
_3
20031031
Product data (9397 750 12242). ECN 853-2291 01-A14288 of 31 October 2003.
Supersedes data of 17 Oct 2003 (9397 750 12098).
Modifications:
• Added 2.5 V output voltage option.
• Features on page 2: “Wide operating temperature range: –30 to +85 °C” changed to
“Wide operating temperature range: –40 to +85 °C”.
_2
_1
20031017
20011003
Product data (9397 750 12098). ECN 853-2291 29545 of 14 February 2003.
Supersedes data of 03 Oct 2001 (9397 750 08962).
Product data (9397 750 08962). ECN 853-2291 27197 of 03 October 2001.
12
2003 Oct 31
Philips Semiconductors
Product data
Micropower 150 mA low noise,
low dropout linear regulator
LP2985-XX
Data sheet status
Product
status
Definitions
[1]
Level
Data sheet status
[2] [3]
I
Objective data
Development
This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.
II
Preliminary data
Product data
Qualification
Production
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL
http://www.semiconductors.philips.com.
[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see
the relevant data sheet or data handbook.
Limitingvaluesdefinition— Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting
values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given
in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no
representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be
expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree
to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes in the products—including circuits, standard cells, and/or software—described
or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated
viaaCustomerProduct/ProcessChangeNotification(CPCN).PhilipsSemiconductorsassumesnoresponsibilityorliabilityfortheuseofanyoftheseproducts,conveys
nolicenseortitleunderanypatent, copyright, ormaskworkrighttotheseproducts, andmakesnorepresentationsorwarrantiesthattheseproductsarefreefrompatent,
copyright, or mask work right infringement, unless otherwise specified.
Koninklijke Philips Electronics N.V. 2003
Contact information
All rights reserved. Printed in U.S.A.
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
Date of release: 10-03
9397 750 12242
For sales offices addresses send e-mail to:
sales.addresses@www.semiconductors.philips.com.
Document order number:
Philips
Semiconductors
相关型号：
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