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Part: LP2951CN
Category:
Description: Micropower Voltage Regulators
Company: Motorola Semiconductor Products
Datasheet: Download LP2951CN datasheet File size : 606 kB
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LP2950 LP2951 Micropower Voltage Regulators
The LP2950 and LP2951 are micropower voltage regulators that are specifically designed to maintain proper regulation with an extremely low inputtooutput voltage differential. These devices feature a very low quiescent bias current of 75 µA and are capable of supplying output currents in excess of 100 mA. Internal current and thermal limiting protection is provided. The LP2951 has three additional features. The first is the Error Output that can be used to signal external circuitry of an out of regulation condition, or as a microprocessor poweron reset. The second feature allows the output voltage to be preset to 5.0 V, 3.3 V or 3.0 V output (depending on the version) or programmed from 1.25 V to 29 V. It consists of a pinned out resistor divider along with direct access to the Error Amplifier feedback input. The third feature is a Shutdown input that allows a logic level signal to turnoff or turnon the regulator output. Due to the low inputtooutput voltage differential and bias current specifications, these devices are ideally suited for battery powered computer, consumer, and industrial equipment where an extension of useful battery life is desirable. The LP2950 is available in the three pin case 29 and DPAK packages, and the LP2951 is available in the eight pin dualinline, SO8 and Micro8 surface mount packages. The `A' suffix devices feature an initial output voltage tolerance ± 0.5%. LP2950 and LP2951 Features:
MICROPOWER LOW DROPOUT VOLTAGE REGULATORS
Z SUFFIX PLASTIC PACKAGE CASE 29 (TO226AA/TO92)
1 2 3
Pin: 1. Output 2. Ground 3. Input
DT SUFFIX PLASTIC PACKAGE CASE 369A (DPAK)
1 3
1
2
3
Pin: 1. Input 2. Ground 3. Output
· · · · · · · · ·
Low Quiescent Bias Current of 75 µA Low InputtoOutput Voltage Differential of 50 mV at 100 µA and 380 mV at 100 mA 5.0 V, 3.3 V or 3.0 V ± 0.5% Allows Use as a Regulator or Reference Extremely Tight Line and Load Regulation Requires Only a 1.0 µF Output Capacitor for Stability Internal Current and Thermal Limiting
(Top View) Heatsink surface (shown as terminal 4 in case outline drawing) is connected to Pin 2.
D SUFFIX PLASTIC PACKAGE CASE 751 (SO8)
8 1
LP2951 Additional Features: Error Output Signals an Out of Regulation Condition Output Programmable from 1.25 V to 29 V Logic Level Shutdown Input
N SUFFIX PLASTIC PACKAGE CASE 626
8 1
DM SUFFIX PLASTIC PACKAGE CASE 846A (Micro8)
8 1
Output 1 Sense 2 Shutdown 3 Gnd 4 (See Following Page for Ordering Information.)
© Motorola, Inc. 1996
8 7 6 5 (Top View)
Input Feedback VO Tap Error Output
Rev 4
MOTOROLA ANALOG IC DEVICE DATA
1
LP2950 LP2951
ORDERING INFORMATION
Device LP2950CZ** LP2950ACZ** LP2950CDT** LP2950ACDT** LP2951CD LP2951ACD LP2951CD** LP2951ACD** LP2951CN LP2951ACN LP2951CN** LP2951ACN** LP2951CDM LP2951ACDM LP2951CDM** LP2951ACDM** Type Operating Temperature Range Package TO92/TO226AA Fixed Voltage (3.0, 3.3 or 5.0 V) Adjustable or 5.0 V Fixed Adjustable or Fixed or Fixed (3.0, 3.3 V) 3 3 V) Adjustable or 5.0 V Fixed Adjustable or Fixed or Fixed (3.0, 3.3 V) 3 3 V) Adjustable or 5.0 V Fixed Adjustable or Fixed or Fixed (3.0, 3.3 V) 3 3 V) Micro8 SO8 TJ = 40° to +125°C 40° to +125°C Plastic DPAK
** = Voltage option of 3.0, 3.3 or 5.0 V.
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
Device No. (±1%) LP2950CX5.0 LP2950CX3.3 LP2950CX3.0 LP2951CX LP2950CX3.3 LP2951CX3.0
X = Package suffix.
Device No. (±0.5%) LP2950ACX5.0 LP2950ACX3.3 LP2950ACX3.0 LP2951ACX LP2951ACX3.3 LP2951ACX3.0
Nominal Voltage 5.0 3.3 3.0 Adjustable or 5.0 Adjustable or 3.3 Adjustable or 3.0
Representative Block Diagrams
Input Battery or Unregulated DC 3 182 k Error Amplifier 1.23 V Reference Gnd Battery or Unregulated DC Input 8 2 Output 1 Sense 182 k 2 5.0 V/100 mA 1.0 µF VO Tap 6 60 k 7 Error Amplifier 60 k 50 k 75 mV/ 60 mV Feedback 330 k Output 1 5.0 V/100 mA 1.0 µF
60 k LP2950CZ5.0
Shutdown From 3 CMOS/TTL
Error Output To CMOS/TTL 5
1.23 V Reference Gnd 4
Error Detection Comparator
LP2951CD or CN
This device contains 34 active transistors.
2
MOTOROLA ANALOG IC DEVICE DATA
LP2950 LP2951
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)
ÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ
Input Voltage VCC PD 30 Vdc W Power Dissipation and Thermal Characteristics Maximum Power Dissipation Case 751(SO8) D Suffix Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Case 369A (DPAK) DT Suffix [Note 1] Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Case 29 (TO226AA/TO92) Z Suffix Thermal Resistance, JunctiontoAmbient Thermal Resistance, JunctiontoCase Case 626 N Suffix Thermal Resistance, JunctiontoAmbient Case 846A (Micro8) DM Suffix Thermal Resistance, JunctiontoAmbient Feedback Input Voltage Internally Limited 180 45 92 6.0 160 83 105 240 1.5 to +30 0.3 to +30 0.3 to +30 RJA RJC RJA RJC RJA RJC RJA RJA Vfb Vsd °C/W °C/W °C/W °C/W °C/W °C/W °C/W °C/W Vdc Vdc Vdc °C °C
Rating
Symbol
Value
Unit
ÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á
Shutdown Input Voltage Error Comparator Output Voltage Operating Junction Temperature Storage Temperature Range Verr TJ 40 to +125 65 to +150 Tstg
NOTE: 1. The JunctiontoAmbient Thermal Resistance is determined by PC board copper area per Figure 26. 2. ESD data available upon request.
ELECTRICAL CHARACTERISTICS (Vin = VO + 1.0 V, IO = 100 µA, CO = 1.0 µF, TJ = 25°C [Note 1], unless otherwise
noted.) Characteristic Output Voltage, 5.0 V Versions Vin = 6.0 V, IO = 100 µA, TJ = 25°C LP2950C5.0/LP2951C LP2950AC5.0/LP2951AC TJ = 40 to +125°C LP2950C5.0/LP2951C LP2950AC5.0/LP2951AC Vin = 6.0 to 30 V, IO = 100 µA to 100 mA, TJ = 40 to +125°C LP2950C5.0/LP2951C LP2950AC5.0/LP2951AC Output Voltage, 3.3 V Versions Vin = 4.3 V, IO = 100 µA, TJ = 25°C LP2950C3.3/LP2951C3.3 LP2950AC3.3/LP2951AC3.3 TJ = 40 to +125°C LP2950C3.3/LP2951C3.3 LP2950AC3.3/LP2951AC3.3 Vin = 4.3 to 30 V, IO = 100 µA to 100 mA, TJ = 40 to +125°C LP2950C3.3/LP2951C3.3 LP2950AC3.3/LP2951AC3.3 Output Voltage, 3.0 V Versions Vin = 4.0 V, IO = 100 µA, TJ = 25°C LP2950C3.0/LP2951C3.0 LP2950AC3.0/LP2951AC3.0 TJ = 40 to +125°C LP2950C3.0/LP2951C3.0 LP2950AC3.0/LP2951AC3.0 Vin = 4.0 to 30 V, IO = 100 µA to 100 mA, TJ = 40 to +125°C LP2950C3.0/LP2951C3.0 LP2950AC3.0/LP2951AC3.0 Symbol VO 4.950 4.975 4.900 4.940 4.880 4.925 VO 3.267 3.284 3.234 3.260 3.221 3.254 VO 2.970 2.985 2.940 2.964 2.928 2.958 3.000 3.000 3.030 3.015 3.060 3.036 3.072 3.042 3.300 3.300 3.333 3.317 3.366 3.340 3.379 3.346 V 5.000 5.000 5.050 5.025 5.100 5.060 5.120 5.075 V Min Typ Max Unit V
MOTOROLA ANALOG IC DEVICE DATA
3
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