LP2967IBPX-2828/NOPB [TI]
DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PBGA8, MICRO, BUMP, SMD-8;
| 型号： | LP2967IBPX-2828/NOPB |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PBGA8, MICRO, BUMP, SMD-8 输出元件 调节器 |
| 文件： | 总19页 (文件大小：1057K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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Texas Instruments.
Search http://www.ti.com/ for the latest technical
information and details on our current products and services.
June 2005
LP2967
Dual Micropower 150 mA Low-Dropout Regulator in
micro SMD Package
General Description
Features
n Ultra low drop-out voltage
The LP2967 is a 150 mA, dual fixed-output voltage regulator
designed to provide ultra low-dropout and low noise in bat-
tery powered applications.
n Guaranteed 150mA output current, 300 mA peak
n Smallest possible size (micro SMD package)
n Requires minimum external components
n Stable with 2.2 µF tantalum or ceramic capacitor
n Output voltage accuracy 1%
Using an optimized VIP (Vertically Integrated PNP) process,
the LP2967 delivers unequalled performance in all specifi-
cations critical to battery powered designs:
Dropout Voltage: Typically 240 mV at 150 mA load, and
6 mV at 1 mA load for each output.
<
n
2 µA quiescent current when shut down
n Wide supply voltage range (16V max.)
n Low ZOUT: 0.3Ω typical (10 Hz to 1 MHz)
n Over temperature/over current protection
n −40˚C to +125˚C junction temperature range
n Custom voltages available
Ground Pin Current: Typically 1 mA at 150 mA load, and
200 µA at 1 mA load for each output.
Enhanced Stability: The LP2967 is stable with output ca-
pacitor ESR as low as 5 mΩ, which allows the use of ceramic
capacitors on the output.
Sleep Mode: Less than 2 µA quiescent current when SD
pins are pulled low.
Applications
n Cellular Phone
Smallest Possible Size: micro SMD package uses absolute
minimum board space.
n Palmtop/Laptop Computer
n Personal Digital Assistance (PDA)
n Camcorder, Personal Stereo and Camera
Precision Output: 1.25% tolerance.
Low Noise: By adding a 100 nF bypass capacitor, output
noise can be reduced to 30 µV (typical).
Multiple voltage options, from 1.8V to 5.0V, are available.
Consult factory for custom voltages.
Block Diagram
10114201
© 2005 National Semiconductor Corporation
DS101142
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Basic Application Circuit
10114202
*SD1 and SD2 must be actively terminated. Tie them to V if their functions are not needed.
IN
**Minimum capacitance are shown to ensure stability (may be increased without limit).
*** Reduces output noise (may be omitted if application is not noise critical). Use ceramic or film type with very low leakage current.
Ordering Information
Output Voltage (V)
Package
Marking
Grade
Order Information
Supplied As
VOUT1
VOUT2
For MSOP Package
2.5
2.5
2.5
2.5
2.6
2.6
2.8
2.8
2.8
2.8
2.8
STD
STD
STD
STD
STD
STD
STD
STD
STD
STD
LP2967IMM-2528
LP2967IMMX-2528
LP2967IMM-2533
LP2967IMMX-2533
LP2967IMM-2626
LP2967IMMX-2626
LP2967IMM-2828
LP2967IMMX-2828
LP2967IMM-2833
LP2967IMMX-2833
LCAB
LCAB
LCBB
LCBB
LCLB
LCLB
LAQB
LAQB
LCCB
LCCB
1000 Units Tape and Reel
3000 Units Tape and Reel
1000 Units Tape and Reel
3000 Units Tape and Reel
1000 Units Tape and Reel
3000 Units Tape and Reel
1000 Units Tape and Reel
3000 Units Tape and Reel
1000 Units Tape and Reel
3000 Units Tape and Reel
2.8
3.3
3.3
2.6
2.6
2.8
2.8
3.3
3.3
For 8-Bump micro SMD Package (BPA08)
1.8
1.8
1.8
1.8
2.5
2.5
2.5
2.5
2.6
2.6
2.8
2.8
2.5
2.5
3.3
3.3
2.8
2.8
3.3
3.3
2.6
2.6
2.8
2.8
STD
STD
STD
STD
STD
STD
STD
STD
STD
STD
STD
STD
LP2967IBP-1825
LP2967IBPX-1825
LP2967IBP-1833
LP2967IBPX-1833
LP2967IBP-2528
LP2967IBPX-2528
LP2967IBP-2533
LP2967IBPX-2533
LP2967IBP-2626
LP2967IBPX-2626
LP2967IBP-2828
LP2967IBPX-2828
L0P
L0P
L0R
L0R
CA
CA
CB
CB
CL
1000 Units Tape and Reel
3500 Units Tape and Reel
1000 Units Tape and Reel
3500 Units Tape and Reel
1000 Units Tape and Reel
3500 Units Tape and Reel
1000 Units Tape and Reel
3500 Units Tape and Reel
1000 Units Tape and Reel
3500 Units Tape and Reel
1000 Units Tape and Reel
3500 Units Tape and Reel
CL
AQ
AQ
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2
Ordering Information (Continued)
Output Voltage (V)
Grade
Package
Marking
Order Information
Supplied As
VOUT1
2.8
2.8
VOUT2
3.3
3.3
STD
STD
LP2967IBP-2833
LP2967IBPX-2833
CC
CC
1000 Units Tape and Reel
3500 Units Tape and Reel
For 8-Bump micro SMD Package (TPA08)
1.8
1.8
2.5
2.5
STD
STD
LP2967ITP-1825
LP2967ITPX-1825
L07
L07
1000 Units Tape and Reel
3500 Units Tape and Reel
10114205
10114206
3
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Package Outline and Connection Diagram
10114204
Top View
Mini SO-8 Package
10114203
8-Lead Small Outline Integrated Circuit (SOIC) Package
Code: MM
Top View
micro SMD
8-Bump micro SMD Package
Code: BP, TP
Pin Description
Pin Number
Name
OUT2
Function
micro SMD
MSOP
V
A1
B1
C1
C2
C3
B3
A3
A2
7
6
Output voltage of the second LDO
SD2
BYPASS
GND
Shutdown input for the second LDO
Bypass capacitor for the bandgap
Ground Substrate
5
-
GND
4
Common Ground
SD1
3
Shutdown input for the first LDO
Output voltage of the first LDO
Common input voltage for both LDOs
VOUT
VIN
1
2
1, 8
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4
Absolute Maximum Ratings (Note 1)
ESD Rating (Note 2)
1.5kV
−0.3V to +16V
2.1V to +16V
−0.3V to +16V
Input Supply Voltage (Survival)
Input Supply Voltage (Operating)
Shutdown Input Voltage (Survival)
Output Voltage (Survival) (Note 4)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Storage Temperature Range
Lead Temp. ( IR reflow, 10 sec.)
Pad Temp. (IR reflow, 10 sec.)
Operating Junction Temp. Range
Power Dissipation (Note 4)
−65˚C to +150˚C
245˚C
I
OUT (Survival)
Short Circuit Protected
−0.3V to + 16V
245˚C
Input-Output Voltage (Survival),
(Note 5)
−40˚C to +125˚C
Internally Limited
Electrical Characteristics
Limits in standard typeface are for Tj = 25˚C, and limits in boldface type apply over the full operating junction temperature
range. Unless otherwise specified, VIN = VO(NOM) + 1V, IL = 1mA, CIN = 1µF,COUT = 4.7µF, VON/OFF = 1.6V.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Operating Specifications
VO
Output Voltage
ILOAD = 1mA
−1.25
1.25
3.0
%
<
<
Tolerance
1mA ILOAD 150 mA
−3.0
<
<
∆VO/∆VIN
Line Regulation
Load Regulation
VO(NOM) + 1V VIN 16V
0.08
%/V
∆VO/∆ILOAD
VIN = VO(NOM) + 1V (Note 6)
−5
6
mV/V
<
<
1mA ILOAD 150 mA
ILOAD = 1mA
10
15
Dropout Voltage
(Note 7)
ILOAD = 50mA
ILOAD = 150mA
100
240
125
180
290
425
(VIN - VO) Min.
mV
Operating Currents
Both Regulators ON
ILOAD (1 and 2) = 1mA
ILOAD (1 and 2) = 150mA
One Regulator OFF
ILOAD (1 and 2) = 1mA
ILOAD (1 and 2) = 150mA
Both Regulators OFF
(Shutdown)
200
300
1700
5000
IQ
Quiescent Current
µA
180
250
1000
2500
2
<
IPEAK
Peak Output
Current
VO VOUT(NOM) − 5%
200
1.6
450
1.4
0.8
mA
V
Control Inputs (SD1, SD2)
VIN (H)
VIN (L)
ION/OFF
Regulator ON
Control Input
Voltage
<
Regulator OFF
Control Input
Voltage
VO VOUT(NOM) − 5%
0.3
V
Control Input
Current
V(SD) = 0V
V(SD) = 5V
−2
7
µA
Dynamic Characteristics
en Output Noise
Voltage
CBYPASS = 100nF, 300 to
100kHz
30
µV rms
5
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Electrical Characteristics (Continued)
Limits in standard typeface are for Tj = 25˚C, and limits in boldface type apply over the full operating junction temperature
range. Unless otherwise specified, VIN = VO(NOM) + 1V, IL = 1mA, CIN = 1µF,COUT = 4.7µF, VON/OFF = 1.6V.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
CBYPASS = 100nF, VIN
=
VO(NOM) + 1V + 100mV p-p
square wave (trise and tfall =
100ns)
F = 120Hz
−52
−54
−56
−58
−50
−47
−70
RR
Ripple Rejection
dB
F = 800Hz
F = 1000Hz
F = 1600Hz
F = 10kHz
F = 100kHz
F = 1MHz
∆ILOAD 1 = 150 mA at 1kHz rate
(15 mA/µs rise and fall slope)
ILOAD2 = 1mA
Crosstalk
Rejection
∆VOUT 2/ ∆VOUT
1
−100
−100
Xtalk
dB
∆ILOAD 2 = 150 mA at 1KHz rate
(15 mA/µs rise and fall slope)
ILOAD 1 = 1mA
∆VOUT 2/ ∆VOUT
1
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
beyond its rated operating conditions.
Note 2: Rating is for the human body mode, a 100pF capacitor discharged through a 1.5kΩ resistor into each pin.
Note 3: The maximum allowable power dissipation is calculated by using P
= (T
- T /θ , where T
is the maximum junction temperature, T is the
JMAX A
DMAX
JMAX
A
JA
ambient temperature, and θ is the junction-to-ambient thermal resistance of the specified package. Therefore, the maximum power dissipation must be derated
JA
at elevated temperatures and is limited by T
, θ and .
JMAX JA
A
Note 4: If used in a dual-supply system where the regulator load is returned to a negative supply, the LP2967 output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the V and V
terminals that is normally reverse-biased. Reversing the polarity from V and V
IN OUT
IN
OUT
will turn on this diode.
Note 6: Load regulation excursion over temperature is included in Output Voltage Tolerance.
Note 7: The dropout voltage of a regulator is defined as the minimum input-to-output differential required to stay within 100mV of the output voltage measured with
a 1V differential.
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6
Typical Performance Characteristics Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VON/OFF
= 1.6V, IL = 1mA, TA = 25˚C.
Output Voltage vs Temperature
Output Voltage vs Temperature
10114255
10114256
Output Voltage vs Temperature
Dropout Voltage vs Load
10114257
10114216
Dropout Voltage vs Temp. and Load
Ground Pin Current vs Temp. and Load
10114217
10114218
7
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Typical Performance Characteristics Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VON/OFF
= 1.6V, IL = 1mA, TA = 25˚C. (Continued)
Cross Channel Isolation
OUT1 = IOUT2 = 1 mA
Cross Channel Isolation
IOUT1 = IOUT2 = 150 mA
I
10114212
10114211
Input Current vs VIN
Input Current vs VIN (VOUT = 3.3V)
10114213
10114214
Input Current vs VIN (VOUT = 2.5V)
Shutdown Current vs Shutdown Voltage
10114215
10114220
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8
Typical Performance Characteristics Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VON/OFF
= 1.6V, IL = 1mA, TA = 25˚C. (Continued)
Short Circuit Current vs VOUT
Short Circuit Current vs Time
10114259
10114258
Short Circuit Current
Line Transient Reponse
10114260
10114222
Line Transient Reponse
Line Transient Reponse
10114223
10114224
9
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Typical Performance Characteristics Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VON/OFF
= 1.6V, IL = 1mA, TA = 25˚C. (Continued)
Load Transient Reponse (VOUT1)
Load Transient Reponse (VOUT1)
Load Transient Reponse (VOUT2)
Load Transient Reponse (VOUT1)
Load Transient Reponse (VOUT2)
Load Transient Reponse (VOUT2)
10114231
10114233
10114235
10114232
10114234
10114236
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10
Typical Performance Characteristics Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VON/OFF
= 1.6V, IL = 1mA, TA = 25˚C. (Continued)
LP2967-2.5V Turn-On Time (2nd Output OFF)
LP2967-2.5V Turn-On Time (2nd Output ON)
10114240
10114241
Output Impedance vs Frequency
Ripple Rejection vs Frequency
10114248
10114249
Ripple Rejection vs Frequency
Ripple Rejection vs Frequency
10114250
10114251
11
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Typical Performance Characteristics Unless otherwise specified: CIN = 1µF, COUT = 4.7µF, VON/OFF
= 1.6V, IL = 1mA, TA = 25˚C. (Continued)
Ripple Rejection vs Frequency
Ripple Rejection vs Frequency
10114252
10114253
Ripple Rejection vs Frequency
Output Noise Density
10114262
10114254
Output Noise Density
10114261
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12
Application Hints
LP2967-3.3V Region of Stability with 4.7 µF COUT
EXTERNAL CAPACITORS
The LP2967 low dropout regulator requires two external
capacitors, CIN and COUT to assure the device’s output
stability. CBYPASS may be used to reduce output noise. The
capacitors must be correctly selected with respect to capaci-
tance values for all three capacitors and ESR value for
COUT
.
Input Capacitor
An input capacitor with a minimum capacitance value of 1µF
is required between the LP2967 input and ground (the
amount of capacitance may be increased without limit). This
capacitor must be located a distance of not more than 0.5
inches from the input pin and returned to a clean analog
ground. Any good quality ceramic or tantalum may be used
for this capacitor.
10114207
LP2967-2.5V Region Of Stability with 10 µF COUT
Output Capacitor
The output capacitor must meet the requirement for mini-
mum capacitance value of 2.2 µF and also have an appro-
priate ESR (equivalent series resistance) value. The LP2967
is actually designed to work with ceramic or tantalum output
capacitors, utilizing circuitry which allows the regulator to be
stable with an output capacitor whose ESR is as low as 4
mΩ. It may also be possible to use a film capacitor at the
output, but this type is not as attractive for reasons of size
and cost.
Important: The output capacitor must maintain its ESR in
the stable region over the full operating temperature range of
the application to assure stability. The minimum required
amount of output capacitance is 2.2 µF. Output capacitor
size can be increased without limit. It is important to remem-
ber that capacitor tolerance and variation with temperature
must be taken into consideration when selecting an output
capacitor so that the minimum required amount of output
capacitance is provided over the full operating temperature
range.
10114209
LP2967-2.5V Region Of Stability with 4.7 µF COUT
LP2967-3.3V Region of Stability with 10 µF COUT
10114210
10114208
13
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ceramic capacitors is that their capacitance can vary with
temperature. Most large value ceramic capacitors are manu-
factured with the Z5U or Y5V temperature characteristic,
which results in the capacitance dropping by more than 50%
as the temperature goes from 25˚C to 85˚C. This could
cause problems if a 2.2 µF capacitor were used on the
output since it will drop down to approximately 1 µF at high
ambient temperatures. This could cause the LP2967 to os-
cillate. If Z5U or Y5V capacitors are used on the output, a
minimum capacitance value of 4.7 µF must be used.
Application Hints (Continued)
LP2967-2.5V Region Of Stability with 2.2 µF COUT
A better choice for temperature coefficient in ceramic capaci-
tors is X7R or X5R which hold the capacitance to within
15% over the full temperature range. Unfortunately, the
larger values of capacitance are not offered by all manufac-
turers in the X7R dielectric.
Tantalum
For the LP2967, tantalum capacitors are less desirable than
ceramic for use as output capacitors because they are typi-
cally more expensive when comparing equivalent capaci-
tance and voltage ratings in the 2.2 µF to 4.7 µF range of
capacitance. Tantalum capacitors have good temperature
stability: a 4.7µF was tested and showed a 10% decline in
capacitance as the temperature was decreased from +125˚C
to −40˚C while the ESR increased by about 2:1 over the
same range of temperatures. This increase in ESR at lower
temperatures can cause oscillations when marginal quality
capacitors are used and the upper limit for ESR value is
exceeded.
10114265
No-Load Operation
If a 2.2 µF output capacitor is used, the minimum stable ESR
value rises to about 0.5 Ω at load currents below 1 mA. If
the minimum output load is 1 mA (with COUT = 2.2 µF), a
Tantalum output capacitor should be used (the ESR of a
ceramic will be too low). It should be noted that if a 4.7 µF (or
larger) output capacitor is used, the part is fully stable with
either Tantalum or ceramic from no load to full load output
current.
<
Aluminum
Bypass Capacitor
The large physical size of aluminum electrolytic capacitors
make them unattractive for use with the LP2967. Their ESR
characteristics are also not well suited to the requirements of
LDO regulators. The ESR of an aluminum electrolytic is
higher than that of a tantalum, and it also varies greatly with
temperature. A typical aluminum electrolytic can exhibit an
ESR increase of 50X when going from 20˚C to −40˚C. Also,
some aluminum electrolytic capacitors can not be used be-
low −25˚C because the electrolyte will freeze.
Connecting a 10 nF capacitor to the Bypass pin significantly
reduces noise on the regulator output. It should be noted that
the capacitor is connected directly to a high impedance
circuit in the bandgap reference. Because this circuit has
only a few microamperes flowing into it, any significant load-
ing on this node will cause a change in the regulated output
voltage. For this reason, DC leakage current through the
noise bypass capacitor must never exceed 100 nA, and
should be kept as low as possible for best output voltage
accuracy. The types of capacitors best suited for the noise
bypass capacitor are ceramic and film capacitors. High qual-
ity ceramic capacitors with either NPO or COG dielectric
typically have very low leakage. 10 nF polypropylene and
polycarbonate film capacitors are available in small surface
mount packages and typically have extremely low leakage
current.
SHUTDOWN OPERATION
The two LDO regulators in the LP2967 have independent
shutdown pins. A low logic level signal at either of the shut-
down pins SD1 or SD2 will turn off the corresponding regu-
lator output VOUT1 or VOUT2. Pins SD1 and SD2 must be
terminated by tying them to VIN for a proper operation when
the shutdown function is not required.
CAPACITOR CHARACTERISTICS
Ceramic
REVERSE CURRENT PATH
The internal power transistor in the LP2967 has an inherent
parasitic diode. During normal operation, the input voltage is
higher than the output voltage and the parasitic diode is
reverse biased. However, if the output is pulled above the
input in an application, then current flows from the output to
the input if the parasitic diode gets forward biased. The
output can be pulled above the input as long as the current
in the parasitic diode is limited to 150mA.
Ceramic capacitors have the lowest ESR values, which
make them best for eliminating high frequency noise. The
outputs of LP2967 require a minimum of 2.2 µF of capaci-
tance. The ESR of a typical 2.2 µF ceramic capacitor is in the
range of 4 mΩ to 20 mΩ, which easily meets the ESR limits
required for stability by the LP2967. One disadvantage of
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14
ambient temperature coefficient (θJA) for an MSOP-8 pack-
age is 235˚C/W and the 8-bump micro SMD with minimum
copper area is 220˚C/W. The total power dissipation of the
device is given by:
Application Hints (Continued)
MAXIMUM POWER DISSAIPATION CAPABILITY
Each output pin the LP2967 can deliver a current of up to
150mA over the full operating junction temperature range.
However, the maximum output current must be derated at
higher ambient temperature to ensure the junction tempera-
ture does not exceed 125˚C. Under all possible conditions,
the junction temperatures must be within the range specified
under operating conditions. The LP2967 is available in
MSOP-8 package and 8-bump micro SMD. The junction to
PD = (VIN − VOUT1) IOUT1 + (VIN − VOUT2) IOUT
2
The maximum power dissipation, PDmax, that the device
can tolerate can be calculated by using the formula:
PDmax = (TJMAX − TA) / θJA
where TJMAX is the maximum specified junction temperature
(125˚C), and TA is the maximum ambient temperature.
15
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Physical Dimensions inches (millimeters) unless otherwise noted
micro SMD Package
NS Package Number TPA08F5A
The dimensions of X1, X2, and X3 are given below:
X1 = 1.412mm
X2 = 1.946mm
X3 = 0.500mm
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16
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
micro SMD Package
NS Package Number BPA08F5B
The dimensions of X1, X2, and X3 are given below:
X1 = 1.412mm
X2 = 1.946mm
X3 = 0.850mm
Mini SO-8 Package Type MM
For Ordering, Refer to Ordering Information Table
NS Package Number MUA08A
17
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Notes
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
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Multi-Output Power-Supply ControllerWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130CG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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SI9130LG-T1-E3
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9130_11
Pin-Programmable Dual Controller - Portable PCsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137DB
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9137LG
Multi-Output, Sequence Selectable Power-Supply Controller for Mobile ApplicationsWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
SI9122E
500-kHz Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification DriversWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
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VISHAY
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