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LP2988IMX-2.8 데이터시트 PDF




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부품번호 LP2988IMX-2.8 기능
기능 Micropower/ 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988)
제조업체 National Semiconductor
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LP2988IMX-2.8 데이터시트, 핀배열, 회로
March 1999
LP2987/LP2988
Micropower, 200 mA Ultra Low-Dropout Voltage
Regulator with Programmable Power-On Reset Delay;
Low Noise Version Available (LP2988)
General Description
The LP2987/8 are fixed-output 200 mA precision LDO volt-
age regulators with power-ON reset delay which can be
implemented using a single external capacitor.
The LP2988 is specifically designed for noise-critical appli-
cations. A single external capacitor connected to the Bypass
pin reduces regulator output noise.
Using an optimized VIP(Vertically Integrated PNP) pro-
cess, these regulators deliver superior performance:
Dropout Voltage: 180 mV @ 200 mA load, and 1 mV @ 1 mA
load (typical).
Ground Pin Current: 1 mA @ 200 mA load, and 200 µA @
10 mA load (typical).
Sleep Mode: The LP2987/8 draws less than 2 µA quiescent
current when shutdown pin is held low.
Error Flag/Reset: The error flag goes low when the output
drops approximately 5% below nominal. This pin also pro-
vides a power-ON reset signal if a capacitor is connected to
the DELAY pin.
Precision Output: Standard product versions of the LP2987
and LP2988 are available with output voltages of 5.0V, 3.8V,
3.3V, 3.2V, 3.0V, or 2.8V, with guaranteed accuracy of 0.5%
(“A” grade) and 1% (standard grade) at room temperature.
Features
n Ultra low dropout voltage
n Power-ON reset delay requires only one component
n Bypass pin for reduced output noise (LP2988)
n Guaranteed continuous output current 200 mA
n Guaranteed peak output current > 250 mA
n SO-8 and mini SO-8 surface mount packages
n <2 µA quiescent current when shutdown
n Low ground pin current at all loads
n 0.5% output voltage accuracy (“A” grade)
n Wide supply voltage range (16V max)
n Overtemperature/overcurrent protection
n −40˚C to +125˚C junction temperature range
Applications
n Cellular Phone
n Palmtop/Laptop Computer
n Camcorder, Personal Stereo, Camera
Block Diagrams
DS100017-1
VIPis a trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS100017
DS100017-2
www.national.com




LP2988IMX-2.8 pdf, 반도체, 판매, 대치품
Connection Diagram (LP2988)
Surface Mount Packages:
Mini SO-8 Package Type MM: See NS Package Drawing Number MUA08A
SO-8 Package Type M: See NS Package Drawing Number M08A
DS100017-16
Top View
For ordering information, refer to Table 2 in this document.
Ordering Information (LP2988)
Output Voltage
5
5
5
5
3.8
3.8
3.8
3.8
3.3
3.3
3.3
3.3
3.2
3.2
3.2
3.2
3.0
3.0
3.0
3.0
2.8
2.8
2.8
2.8
5
5
5
5
3.8
3.8
3.8
3.8
3.3
3.3
TABLE 2. Package Marking and Ordering Information
Grade
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
STD
STD
A
A
Order Information
LP2988AIMMX-5.0
LP2988AIMM-5.0
LP2988IMMX-5.0
LP2988IMM-5.0
LP2988AIMMX-3.8
LP2988AIMM-3.8
LP2988IMMX-3.8
LP2988IMM-3.8
LP2988AIMMX-3.3
LP2988AIMM-3.3
LP2988IMMX-3.3
LP2988IMM-3.3
LP2988AIMMX-3.2
LP2988AIMM-3.2
LP2988IMMX-3.2
LP2988IMM-3.2
LP2988AIMMX-3.0
LP2988AIMM-3.0
LP2988IMMX-3.0
LP2988IMM-3.0
LP2988AIMMX-2.8
LP2988AIMM-2.8
LP2988IMMX-2.8
LP2988IMM-2.8
LP2988AIMX-5.0
LP2988AIM-5.0
LP2988IMX-5.0
LP2988IM-5.0
LP2988AIMX-3.8
LP2988AIM-3.8
LP2988IMX-3.8
LP2988IM-3.8
LP2988AIMX-3.3
LP2988AIM-3.3
Package Marking
L51A
L51A
L51B
L51B
L0AA
L0AA
L0AB
L0AB
L50A
L50A
L50B
L50B
L67A
L67A
L67B
L67B
L49A
L49A
L49B
L49B
L0IA
L0IA
L0IB
L0IB
2988AIM5.0
2988AIM5.0
2988IM5.0
2988IM5.0
2988AIM3.8
2988AIM3.8
2988IM3.8
2988IM3.8
2988AIM3.3
2988AIM3.3
Supplied as:
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
3.5k Units on Tape and Reel
250 Units on Tape and Reel
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
2.5k Units on Tape and Reel
Shipped in Anti-Static Rails
www.national.com
4

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LP2988IMX-2.8 전자부품, 판매, 대치품
Electrical Characteristics (Continued)
Limits in standard typeface are for TJ = 25˚C, and limits in boldface type apply over the full operating temperature range. Un-
less otherwise specified: VIN = VO(NOM) + 1V, IL = 1 mA, COUT = 4.7 µF, CIN = 2.2 µF, VS/D = 2V.
Symbol
Parameter
Conditions
Typical
LM2987/8AI-X.X
(Note 6)
Min Max
LM2987/8I-X.X
(Note 6)
Min Max
Units
IDELAY
Delay Pin Current
Source
1.6 2.8 1.6 2.8
2.2
1.4 3.0 1.4 3.0
µA
SHUTDOWN INPUT
VS/D
IS/D
S/D Input Voltage
(Note 8)
S/D Input Current
ERROR COMPARATOR
VH = O/P ON
VL = O/P OFF
VS/D = 0
VS/D = 5V
1.4 1.6
1.6
0.55
0.18
0.18
0 −1 −1
5 15 15
V
µA
IOH Output “HIGH” Leakage VOH = 16V
0.01
1
2
1
µA
2
VOL
Output “LOW” Voltage
VIN = VO(NOM) − 0.5V,
IO(COMP) = 300 µA
150
220
350
220
mV
350
VTHR
(MAX)
Upper Threshold
Voltage
−5.5
−3.5
−5.5
−3.5
−4.6
−7.7
−2.5
−7.7
−2.5
VTHR
(MIN)
Lower Threshold
Voltage
−6.6
−8.9
−13.0
−4.9
−3.3
−8.9
−13.0
−4.9
−3.3
%VOUT
HYST
Hysteresis
2.0
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the de-
vice outside of its rated operating conditions.
Note 2: The ESD rating of the Bypass pin is 500V (LP2988 only.)
Note 3: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJ−A,
and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
The value of θJ−A for the SO-8 (M) package is 160˚C/W, and the mini SO-8 (MM) package is 200˚C/W. Exceeding the maximum allowable power dissipation will cause
excessive die temperature, and the regulator will go into thermal shutdown.
Note 4: If used in a dual-supply system where the regulator load is returned to a negative supply, the LM2987/8 output must be diode-clamped to ground.
Note 5: The output PNP structure contains a diode between the VIN and VOUT terminals that is normally reverse-biased. Forcing the output above the input will turn
on this diode and may induce a latch-up mode which can damage the part (see Application Hints).
Note 6: Limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 7: Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a 1V differential.
Note 8: To prevent mis-operation, the Shutdown input must be driven by a signal that swings above VH and below VL with a slew rate not less than 40 mV/µs (see
Application Hints).
Note 9: Temperature coefficient is defined as the maximum (worst-case) change divided by the total temperature range.
Note 10: See Typical Performance Characteristics curves.
7 www.national.com

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관련 데이터시트

부품번호상세설명 및 기능제조사
LP2988IMX-2.8

Micropower/ 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988)

National Semiconductor
National Semiconductor
LP2988IMX-2.8

Micropower/ 200 mA Ultra Low-Dropout Voltage Regulator with Programmable Power-On Reset Delay; Low Noise Version Available (LP2988)

National Semiconductor
National Semiconductor

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