SLVS033G February   1990  – July 2015 LT1054

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Reference and Error Amplifier for Regulation
      2. 7.3.2 External Oscillator Synchronization
      3. 7.3.3 Output Current and Voltage Loss
      4. 7.3.4 Reference Voltage
    4. 7.4 Device Functional Modes
      1. 7.4.1 Main Operation
      2. 7.4.2 Shutdown
  8. 8 Application 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 Output Voltage Programming
        2. 8.2.2.2 Capacitor Selection
        3. 8.2.2.3 Output Ripple
        4. 8.2.2.4 Power Dissipation
      3. 8.2.3 Application Curve
    3. 8.3 System Examples
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • P|8
  • DW|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
VCC Supply voltage(2) 16 V
VI Input voltage FB/SD 0 VCC V
OSC 0 Vref V
TJ Junction temperature(3) LT1054C 125 °C
LT1054I 135 °C
Tstg Storage temperature –55 150 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) The absolute maximum supply-voltage rating of 16 V is for unregulated circuits. For regulation-mode circuits with VOUT ≤ 15 V, this rating may be increased to 20 V.
(3) The devices are functional up to the absolute maximum junction temperature.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±500 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±3500
(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 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
VCC Supply voltage 3.5 15 V
TA Operating free-air temperature range LT1054C 0 70 °C
LT1054I –40 85

6.4 Thermal Information

THERMAL METRIC(1) LT1054 UNIT
P (PDIP) DW (SOIC)
8 PINS 16 PINS
RθJA Junction-to-ambient thermal resistance 85 57 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

6.5 Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS TA(1) LT1054C, LT1054I UNIT
MIN TYP(2) MAX
VO Regulated output voltage VCC = 7 V, TJ = 25°C, RL = 500 Ω (3) 25°C −4.7 −5 −5.2 V
Input regulation VCC = 7 V to 12 V, RL = 500 Ω(3) Full range 5 25 mV
Output regulation VCC = 7 V, RL = 100 Ω to 500 Ω(3) Full range 10 50 mV
Voltage loss,
VCC − |VO| (4)		 CI = CO = 100-μF tantalum IO = 10 mA Full range 0.35 0.55 V
IO = 100 mA 1.1 1.6
Output resistance ΔIO = 10 mA to 100 mA See (5) Full range 10 15 Ω
Oscillator frequency VCC = 3.5 V to 15 V Full range 15 25 35 kHz
Vref Reference voltage I(REF) = 60 μA 25°C 2.35 2.5 2.65 V
Full range 2.25 2.75
Maximum switch current 25°C 300 4 mA
ICC Supply current IO = 0 VCC = 3.5 V Full range 2.5 5 mA
VCC = 15 V 3 200
Supply current in shutdown V(FB/SD) = 0 V Full range 100 μA
(1) Full range is 0°C to 70°C for the LT1054C and −40°C to 85°C for the LT1054I.
(2) All typical values are at TA = 25°C.
(3) All regulation specifications are for a device connected as a positive-to-negative converter/regulator with R1 = 20 kΩ, R2 = 102.5 kΩ, external capacitor CIN = 10 μF (tantalum), external capacitor COUT = 100 μF (tantalum) and C1 = 0.002 μF (see ).
(4) For voltage-loss tests, the device is connected as a voltage inverter, with terminals 1, 6, and 7 unconnected. The voltage losses may be higher in other configurations. CIN and COUT are external capacitors.
(5) Output resistance is defined as the slope of the curve (ΔVO versus ΔIO) for output currents of 10 mA to 100 mA. This represents the linear portion of the curve. The incremental slope of the curve is higher at currents less than 10 mA due to the characteristics of the switch transistors.

6.6 Typical Characteristics

Data at high and low temperatures are applicable only within the recommended operating free-air temperature range.

Table 1. Table of Graphs

FIGURE
Shutdown threshold voltage vs Free-air temperature Figure 1
Supply current vs Input voltage Figure 2
Oscillator frequency vs Free-air temperature Figure 3
Supply current in shutdown vs Input voltage Figure 4
Average supply current vs Output current Figure 5
Output voltage loss vs Input capacitance Figure 6
Output voltage loss vs Oscillator frequency (10 µF) Figure 7
Output voltage loss vs Oscillator frequency (100 µF) Figure 8
Regulated output voltage vs Free-air temperature Figure 9
Reference voltage change vs Free-air temperature Figure 10
Voltage loss vs Output current Figure 17
LT1054 typ_char_01_stv_v_fat_slvs033.gif
Figure 1. Shutdown Threshold Voltage vs Free-Air Temperature
LT1054 typ_char_03_of_v_fat_slvs033.gif
Figure 3. Oscillator Frequency vs Free-air Temperature
LT1054 typ_char_05_asc_v_oc_slvs033.gif
Figure 5. Average Supply Current vs Output Current
LT1054 typ_char_07_ovl_v_of_slvs033.gif
Figure 7. Output Voltage Loss vs Oscillator Frequency
LT1054 typ_char_09_rov_v_fat_slvs033.gif
Figure 9. Regulated Output Voltage vs Free-air Temperature
LT1054 typ_char_02_sc_v_iv_slvs033.gif
Figure 2. Supply Current vs Input Voltage
LT1054 typ_char_04_scis_v_iv_slvs033.gif
Figure 4. Supply Current in Shutdown vs Input Voltage
LT1054 typ_char_06_ovl_v_ic_slvs033.gif
Figure 6. Output Voltage Loss vs Input Capacitance
LT1054 typ_char_08_ovl_v_of_slvs033.gif
Figure 8. Output Voltage Loss vs Oscillator Frequency
LT1054 typ_char_10_rvc_v_fat_slvs033.gif
Figure 10. Reference Voltage Change vs Free-air Temperature