JAJSBA0Q January   2000  – December 2017 LP2950-N , LP2951-N

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
    1.     LP2951の概略回路図
  3. 3 概要
    1.     LP2950-Nの概略回路図
  4. 4 改訂履歴
  5. 5 Voltage Options
  6. 6 Pin Configuration and Functions
    1.     Pin Functions: LP2950-N
    2.     Pin Functions: LP2951-N
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information: LP2950-N
    5. 7.5 Thermal Information: LP2951-N
    6. 7.6 Electrical Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Fixed Voltage Options and Programmable Voltage Version
      2. 8.3.2 High Accuracy Output Voltage
      3. 8.3.3 Low Dropout Voltage
      4. 8.3.4 Shutdown Mode
      5. 8.3.5 Error Detection Comparator Output
      6. 8.3.6 Internal Protection Circuitry
        1. 8.3.6.1 Short-Circuit Protection (Current Limit)
        2. 8.3.6.2 Thermal Protection
      7. 8.3.7 Enhanced Stability
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation with 30 V ≥ VIN > VOUT(TARGET) + 1 V
      2. 8.4.2 Operation with Shutdown Control
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1  1-A Regulator with 1.2-V Dropout
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Output Capacitor Requirements
          2. 9.2.1.2.2 Input Capacitor Requirements
          3. 9.2.1.2.3 Error Detection Comparator Output
          4. 9.2.1.2.4 Programming the Output Voltage (LP2951-N)
          5. 9.2.1.2.5 Reducing Output Noise
        3. 9.2.1.3 Application Curves
      2. 9.2.2  300-mA Regulator with 0.75-V Dropout
      3. 9.2.3  Wide Input Voltage Range Current Limiter
      4. 9.2.4  Low Drift Current Source
      5. 9.2.5  5-V Current Limiter
      6. 9.2.6  Regulator with Early Warning and Auxiliary Output
      7. 9.2.7  Latch Off When Error Flag Occurs
      8. 9.2.8  2-A Low Dropout Regulator
      9. 9.2.9  5-V Regulator with 2.5-V Sleep Function
      10. 9.2.10 Open Circuit Detector for 4 → 20-mA Current Loop
      11. 9.2.11 Regulator with State-of-Charge Indicator
      12. 9.2.12 Low Battery Disconnect
      13. 9.2.13 System Overtemperature Protection Circuit
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 WSON Mounting
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 ドキュメントのサポート
      1. 12.1.1 関連資料
    2. 12.2 関連リンク
    3. 12.3 コミュニティ・リソース
    4. 12.4 商標
    5. 12.5 静電気放電に関する注意事項
    6. 12.6 Glossary
  13. 13メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7.6 Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)(1)
PARAMETER TEST CONDITIONS(1) LP2951(2) LP2950AC-XX
LP2951AC-XX		 LP2950C-XX
LP2951C-XX		 UNIT
MIN TYP MAX MIN TYP MAX MIN TYP MAX
3-V VERSIONS(3)
Output voltage TJ = 25°C 2.985 3 3.015 2.985 3 3.015 2.970 3 3.030 V(4)
−25°C ≤ TJ ≤ 85°C 2.970 3 3.030 2.955 3 3.045 V(5)
Full operating temperature range 2.964 3 3.036 V(4)
2.964 3 3.036 2.940 3 3.060 V(5)
Output voltage 100 µA ≤ IL ≤ 100 mA,
100 µA ≤ IL ≤ 100 mA,
TJ ≤ TJMAX 		2.955 3 3.045 V(4)
2.958 3 3.042 2.928 3 3.072 V(5)
3.3-V VERSIONS(3)
Output voltage TJ = 25°C 3.284 3.3 3.317 3.284 3.3 3.317 3.267 3.3 3.333 V(4)
−25°C ≤ TJ ≤ 85°C 3.3 3.267 3.3 3.333 3.251 3.3 3.350 V(5)
Full operating temperature range 3.260 3.3 3.340 V(4)
3.260 3.3 3.340 3.234 3.3 3.366 V(5)
Output voltage 100 µA ≤ IL ≤ 100 mA, TJ ≤ TJMAX 3.251 3.3 3.350 V(4)
3.254 3.3 3.346 3.221 3.3 3.379 V(5)
5-V VERSIONS(3)
Output voltage TJ = 25°C 4.975 5 5.025 4.975 5 5.025 4.95 5 5.05 V(4)
−25°C ≤ TJ ≤ 85°C 5 4.95 5 5.05 4.925 5 5.075 V(5)
Full operating temperature range 4.94 5 5.06 V(4)
4.94 5 5.06 4.9 5 5.1 V(5)
Output voltage 100 µA ≤ IL ≤ 100 mA, TJ ≤ TJMAX 4.925 5 5.075 V(4)
4.925 5 5.075 4.88 5 5.12 V(5)
ALL VOLTAGE OPTIONS
Output voltage temperature coefficient See(6), –40°C ≤ TJ ≤ 125°C 20 120 ppm/°C(4)
20 100 50 150 ppm/°C(5)
Line regulation(7) (VONOM + 1 V) ≤ Vin ≤ 30 V(8) 0.03% 0.1% 0.03% 0.11% 0.04% 0.2% See(4)
(VONOM + 1 V) ≤ Vin ≤ 30 V(8), –40°C ≤ TJ ≤ 125°C 0.03% 0.5% See(4)
0.03% 0.2% 0.04% 0.4% (5)
Load regulation(7) 100 µA ≤ IL ≤ 100 mA 0.04% 0.1% 0.04% 0.1% 0.1% 0.2% See(4)
100 µA ≤ IL ≤ 100 mA, –40°C ≤ TJ ≤ 125°C 0.04% 0.3% See(4)
0.04% 0.2% 0.1% 0.3% See(5)
Dropout voltage(9) IL = 100 µA 50 80 50 80 50 80 mV(4)
IL = 100 µA, –40°C ≤ TJ ≤ 125°C 150 mV(4)
150 150 mV(5)
IL = 100 mA 380 450 380 450 380 450 mV(4)
IL = 100 mA, –40°C ≤ TJ ≤ 125°C 600 600 600 mV(4)
600 600 mV(5)
Ground current IL = 100 µA 75 120 75 120 75 120 µA(4)
IL = 100 µA, –40°C ≤ TJ ≤ 125°C 140 µA(4)
140 140 µA(5)
IL = 100 mA 8 12 8 12 8 12 mA(4)
IL = 100 mA, –40°C ≤ TJ ≤ 125°C 14 mA(4)
14 14 mA(5)
Dropout ground current VIN = (VONOM − 0.5)V, IL = 100 µA 110 170 110 170 110 170 µA(4)
VIN = (VONOM − 0.5 V), IL = 100 µA, –40°C ≤ TJ ≤ 125°C 200 200 200 µA(4)
200 200 µA(5)
Current limit VOUT = 0 V 160 200 160 200 160 200 mA(4)
VOUT = 0 V, –40°C ≤ TJ ≤ 125°C 220 mA(4)
220 220 mA(5)
Thermal regulation See(10) 0.05 0.2 0.05 0.2 0.05 0.2 %/W(4)
Output noise
10 Hz to 100 kHz		 CL = 1µF (5 V Only) 430 430 430 µVRMS
CL = 200 µF 160 160 160 µVRMS
CL = 3.3 µF
(Bypass = 0.01 µF
Pins 7 to 1 (LP2951-N)		 100 100 100 µVRMS
8-PIN VERSIONS ONLY LP2951 LP2951AC-XX LP2951C-XX
Reference voltage 1.22 1.235 1.25 1.22 1.235 1.25 1.21 1.235 1.26 V(4)
–40°C ≤ TJ ≤ 125°C 1.2 1.26 V(4)
1.2 1.26 1 1.2 1.27 V(5)
Reference voltage See(11), –40°C ≤ TJ ≤ 125°C 1.19 1.27 V(4)
1.19 1.27 1.185 1.285 V(5)
Feedback pin bias current 20 40 20 40 20 40 nA(4)
–40°C ≤ TJ ≤ 125°C 60 nA (4)
60 60 nA(5)
Reference voltage temperature coefficient See(6) 20 20 50 ppm/°C
Feedback pin bias current temperature coefficient 0.1 0.1 0.1 nA/°C
ERROR COMPARATOR
Output leakage current VOH = 30 V 0.01 1 0.01 1 0.01 1 µA(4)
VOH = 30 V, –40°C ≤ TJ ≤ 125°C 2 µA(4)
2 2 µA(5)
Output low voltage VIN = (VONOM − 0.5 V), IOL = 400 µA 150 250 150 250 150 250 mV(4)
VIN = (VONOM − 0.5 V), IOL = 400 µA,
–40°C ≤ TJ ≤ 125°C		 400 400 400 mV(4)
400 400 mV(5)
Upper threshold voltage See(12) 40 60 40 60 40 60 mV(4)
See(12), –40°C ≤ TJ ≤ 125°C 25 mV(4)
25 25 mV(5)
Lower threshold voltage See(12) 75 95 75 95 75 95 mV(4)
See(12), –40°C ≤ TJ ≤ 125°C 140 mV(4)
140 140 mV(5)
Hysteresis See(12) 15 15 15 mV
SHUTDOWN INPUT
Input 1.3 1.3 1.3 V
Logic voltage Low (Regulator ON), –40°C ≤ TJ ≤ 125°C 0.6 V(4)
0.7 0.7 V(5)
Logic voltage High (Regulator OFF), –40°C ≤ TJ ≤ 125°C 2 V(4)
2 2 V(5)
Shutdown pin input current Vshutdown = 2.4 V 30 50 30 50 30 50 µA(4)
Vshutdown = 2.4 V
–40°C ≤ TJ ≤ 125°C		 100 µA(4)
100 100 µA(5)
Vshutdown = 30 V 450 600 450 600 450 600 µA(4)
Vshutdown = 30 V,
–40°C ≤ TJ ≤ 125°C		 750 µA(4)
750 750 µA(5)
Regulator output current in shutdown See(13) 3 10 3 10 3 10 µA(4)
–40°C ≤ TJ ≤ 125°C 20 µA(4)
20 20 µA(5)
(1) Unless otherwise noted, all limits apply for TA = TJ = 25°C as well as specified for VIN = (VONOM + 1 V), IL = 100 µA and CL = 1 µF for 5-V versions and 2.2 µF for 3-V and 3.3-V versions. Additional conditions for the 8-pin versions are FEEDBACK tied to VTAP, OUTPUT tied to SENSE, and VSHUTDOWN ≤ 0.8 V.
(2) A Military RETS specification is available on request.
(3) All LP2950 devices have the nominal output voltage coded as the last two digits of the part number. In the LP2951 products, the 3-V and 3.3-V versions are designated by the last two digits, but the 5-V version is denoted with no code at this location of the part number (refer to the Package Option Addendum at end of data sheet).
(4) Ensured and 100% production tested.
(5) Ensured but not 100% production tested. These limits are not used to calculate outgoing AQL levels.
(6) Output or reference voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
(7) Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation.
(8) Line regulation for the LP2951-N is tested at 150°C for IL = 1 mA. For IL = 100 µA and TJ = 125°C, line regulation is specified by design to 0.2%. See Typical Characteristics for line regulation versus temperature and load current.
(9) Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1-V differential. At very low values of programmed output voltage, the minimum input supply voltage of 2 V (2.3 V over temperature) must be taken into account.
(10) Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 50 mA load pulse at VIN = 30 V (1.25-W pulse) for T = 10 ms.
(11) VREF ≤ VOUT ≤ (VIN − 1 V), 2.3 V ≤ VIN ≤ 30 V, 100 µA ≤ IL ≤ 100 mA, TJ ≤ TJMAX.
(12) Comparator thresholds are expressed in terms of a voltage differential at the FEEDBACK pin below the nominal reference voltage measured at VIN = (VO(NOM) + 1) V. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT/VREF = (R1 + R2) / R2.For example, at a programmed output voltage of 5 V, the ERROR output is specified to go low when the output drops by 95 mV × 5 V / 1.235 V = 384 mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% ensured.
(13) VSHUTDOWN ≥ 2 V, VIN ≤ 30 V, VOUT = 0, FEEDBACK pin tied to VTAP.