SNVS430I May   2006  – March 2015 LM26001 , LM26001-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings - LM26001
    3. 6.3 ESD Ratings - LM26001-Q1
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Information
    6. 6.6 Electrical Characteristics
    7. 6.7 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Sleep Mode
      2. 7.3.2 FPWM
      3. 7.3.3 Enable
      4. 7.3.4 Soft-Start
      5. 7.3.5 Current Limit
      6. 7.3.6 Frequency Adjustment and Synchronization
      7. 7.3.7 VBIAS
      8. 7.3.8 Low VIN Operation and UVLO
      9. 7.3.9 PGOOD
    4. 7.4 Device Functional Modes
  8. Applications and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Setting Output Voltage
        2. 8.2.2.2 Inductor
        3. 8.2.2.3 Output Capacitor
        4. 8.2.2.4 Input Capacitor
        5. 8.2.2.5 Bootstrap
        6. 8.2.2.6 Catch Diode
        7. 8.2.2.7 Compensation
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations and TSD
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Related Links
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings(1)(2)

MIN MAX UNIT
Voltages from the indicated pins to GND VIN –0.3 40 V
SW(5) –0.5 40 V
VDD –0.3 7 V
VBIAS –0.3 10 V
FB –0.3 6 V
BOOT SW-0.3 SW+7 V
PGOOD –0.3 7 V
FREQ –0.3 7 V
SYNC –0.3 7 V
EN –0.3 40 V
FPWM –0.3 y7 V
SS –0.3 7 V
Power Dissipation(1)(3) 2.6 W
Recommended Lead Temperature Vapor Phase (70s) 215 °C
Infrared (15s) 220 °C
Storage temperature Tstg –65 150 °C
(1) The maximum allowable power dissipation is a function of the maximum junction temperature, TJ_MAX, the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PD_MAX = (TJ_MAX - TA) /θJA. The maximum power dissipation of 2.6W is determined using TA = 25°C, θJA = 38°C/W, and TJ_MAX = 125°C. The number stated here reflects the maximum power dissipation for the package and not the device.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/Distributors for availability and specifications.
(3) For Device Power Dissipation, please refer to section 10.3.

6.2 ESD Ratings - LM26001

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) ± 2 kV
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) ± 1
Machine model ± 200 V
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 ESD Ratings - LM26001-Q1

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per AEC Q100-002(1) ± 2 kV
Charged device model (CDM), per AEC Q100-011 Corner pins (1, 8, 9, and 16) ± 1
Other pins ± 1
Machine model ± 200 V
(1) AEC Q100-002 indicates HBM stressing is done in accordance with the ANSI/ESDA/JEDEC JS-001 specification.

6.4 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
Operating Junction Temp. –40 125 °C
Supply Voltage(2) 3.0 38 V

6.5 Thermal Information

THERMAL METRIC(1) LM26001 UNIT
PWP
16 PINS
RθJA Junction-to-ambient thermal resistance 38.8 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 23.0
RθJB Junction-to-board thermal resistance 16.7
ψJT Junction-to-top characterization parameter 0.6
ψJB Junction-to-board characterization parameter 16.4
RθJC(bot) Junction-to-case (bottom) thermal resistance 1.7
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.

6.6 Electrical Characteristics

Unless otherwise stated, Vin=12 V. Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only.(3)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SYSTEM
ISD(4) Shutdown Current EN = 0 V 10.8 µA
EN = 0 V, –40°C ≤ TJ ≤ 125°C 20
Iq_Sleep_VB(4) Quiescent Current Sleep mode, VBIAS = 5 V 38 µA
Sleep mode, VBIAS = 5 V, –40°C ≤ TJ ≤ 125°C 70
Iq_Sleep_VDD Quiescent Current Sleep mode, VBIAS = GND 75 µA
Sleep mode, VBIAS = GND, –40°C ≤ TJ ≤ 125°C 125
Iq_PWM_VB Quiescent Current PWM mode, VBIAS = 5 V 150 230 µA
Iq_PWM_VDD Quiescent Current PWM mode, VBIAS = GND 0.65 0.85 mA
IBIAS_Sleep(4) Bias Current Sleep mode, VBIAS = 5 V 33 µA
Sleep mode, VBIAS = 5 V, –40°C ≤ TJ ≤ 125°C 85
IBIAS_PWM Bias Current PWM mode, VBIAS = 5 V 0.5 0.70 mA
VFB Feedback Voltage 5 V < Vin < 38 V 1.234 V
5 V < Vin < 38 V, –40°C ≤ TJ ≤ 125°C 1.2155 1.2525
IFB FB Bias Current ±200 nA
ΔVOUT/ΔVIN Vout line regulation 5 V < Vin < 38 V 0.001 %/V
ΔVOUT/ΔIOUT Vout load regulation 0.8 V < VCOMP < 1.15 V 0.07%
VDD VDD output voltage 7 V < Vin < 35 V, IVDD= 0 mA to 5 mA 5.95 V
7 V < Vin < 35 V, IVDD= 0 mA to 5 mA, –40°C ≤ TJ ≤ 125°C 5.50 6.50
ISS_Source Soft-start source current 2.2 µA
–40°C ≤ TJ ≤ 125°C 1.5 4.6
Vbias_th VBIAS On Voltage Specified at IBIAS = 92.5% of full value 2.64 2.9 3.07 V
SWITCHING
RDS(ON) Switch on Resistance Isw = 1A 0.2 Ω
Isw = 1A, –40°C ≤ TJ ≤ 125°C 0.12 0.42
Isw_off Switch off state leakage current Vin = 38 V, VSW = 0 V 0.002 µA
Vin = 38 V, VSW = 0 V, –40°C ≤ TJ ≤ 125°C 5.0
fsw Switching Frequency RFREQ = 62k, 124k, 240k ±10%
VFREQ FREQ voltage 1.0 V
fSW range Switching Frequency range –40°C ≤ TJ ≤ 125°C 150 500 kHz
VSYNC Sync pin threshold SYNC rising 1.2 V
SYNC rising, –40°C ≤ TJ ≤ 125°C 1.6
SYNC falling 1.1
SYNC falling, –40°C ≤ TJ ≤ 125°C 0.8
Sync pin hysteresis 114 mV
ISYNC SYNC leakage current 6 nA
FSYNC_UP Upper frequency synchronization range As compared to nominal fSW, –40°C ≤ TJ ≤ 125°C 30%
FSYNC_DN Lower frequency synchronization range As compared to nominal fSW, –40°C ≤ TJ ≤ 125°C –20%
TOFFMIN Minimum Off-time 365 ns
TONMIN Minimum On-time 155 ns
THSLEEP_HYS Sleep mode threshold hysteresis VFB rising, % of THWAKE 101.2%
THWAKE Wake up threshold Measured at falling FB, COMP = 0.6 V 1.234 V
IBOOT BOOT pin leakage current BOOT = 16 V, SW = 10 V 0.0006 µA
BOOT = 16 V, SW = 10 V, –40°C ≤ TJ ≤ 125°C 5.0
PROTECTION
ILIMPK Peak Current Limit 2.5 A
–40°C ≤ TJ ≤ 125°C 1.85 3.2
VFB_SC Short circuit frequency foldback threshold Measured at FB falling 0.87 V
F_min_sc Min Frequency in foldback VFB < 0.3 V 71 kHz
VTH_PGOOD Power Good Threshold Measured at FB, PGOOD rising 92%
Measured at FB, PGOOD rising, –40°C ≤ TJ ≤ 125°C 89% 95%
PGOOD hysteresis 2% 7% 8%
IPGOOD_HI PGOOD leakage current PGOOD = 5 V 0.2 nA
RDS_PGOOD PGOOD on resistance PGOOD sink current = 500 µA 64 Ω
VUVLO Under-voltage Lock-Out Threshold Vin falling , shutdown, VDD = VIN 2.9 V
Vin falling , shutdown, VDD = VIN, –40°C ≤ TJ ≤ 125°C 2.60 3.20
Vin rising, soft-start, VDD = VIN 3.9
Vin rising, soft-start, VDD = VIN, –40°C ≤ TJ ≤ 125°C 3.60 4.20
TSD Thermal Shutdown Threshold 160 °C
θJA Thermal resistance Power dissipation = 1W, 0 lfpm air flow 38 °C/W
LOGIC
VthEN Enable Threshold voltage 1.2 V
–40°C ≤ TJ ≤ 125°C 0.8 1.4
Enable hysteresis 120 mV
IEN_Source EN source current EN = 0 V 4.5 µA
VTH_FPWM FPWM threshold 1.2 V
–40°C ≤ TJ ≤ 125°C 0.8 1.6
IFPWM FPWM leakage current FPWM = 5 V 35 nA
EA
gm Error amp trans-conductance 670 µmho
–40°C ≤ TJ ≤ 125°C 400 1000
ICOMP COMP source current VCOMP = 0.9 V 56 µA
COMP sink current VCOMP = 0.9 V 56 µA
VCOMP COMP pin voltage range 0.64 1.27 V
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Recommended Operating Conditions indicate conditions for which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the Electrical Characteristics.
(2) Below 4.0-V input, power dissipation may increase due to increased RDS(ON). Therefore, a minimum input voltage of 4.0 V is required to operate continuously within specification. A minimum of 3.9 V (typical) is also required for startup.
(3) All room temperature limits are 100% production tested. All limits at temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(4) Iq and ISD specify the current into the VIN pin. IBIAS is the current into the VBIAS pin when the VBIAS voltage is greater than 3 V. All quiescent current specifications apply to non-switching operation.
(5) The absolute maximum specification applies to DC voltage. An extended negative voltage limit of -2V applies for a pulse of up to 1 µs, and –1 V for a pulse of up to 20 µs.

6.7 Typical Characteristics

Unless otherwise specified the following conditions apply: VIN = 12 V, TJ = 25°C.
LM26001 LM26001-Q1 20179403.gifFigure 1. VFB vs Temperature
LM26001 LM26001-Q1 20179404.gifFigure 3. IQ and IVBIAS vs Temperature (Sleep Mode)
LM26001 LM26001-Q1 20179416.gifFigure 5. Normalized Switching Frequency vs Temperature (300 kHz)
LM26001 LM26001-Q1 20179415.gifFigure 7. Peak Current Limit vs Temperature
LM26001 LM26001-Q1 20179408.gifFigure 9. Efficiency vs Load Current (330 kHz)
LM26001 LM26001-Q1 20179410.gifFigure 11. Startup Waveforms
LM26001 LM26001-Q1 20179453.gifFigure 13. Low Input Voltage Dropout Nominal VOUT = 5 V
LM26001 LM26001-Q1 20179405.gifFigure 2. VFB vs Vin (IDC = 300 mA)
LM26001 LM26001-Q1 20179406.gifFigure 4. IQ and IVBIAS vs Temperature (PWM Mode)
LM26001 LM26001-Q1 20179417.gifFigure 6. UVLO Threshold vs Temperature (VDD = VIN)
LM26001 LM26001-Q1 20179412.gifFigure 8. Short Circuit Foldback Frequency vs VFB (325 kHz Nominal)
LM26001 LM26001-Q1 20179409.gifFigure 10. Efficiency vs Load Current (500 kHz)
LM26001 LM26001-Q1 20179452.gifFigure 12. Load Transient Response