SNVSAR0 November   2016 LM53602 , LM53603

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  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
    5. 7.5 Electrical Characteristics
    6. 7.6 System Characteristics
    7. 7.7 Timing Requirements
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 RESET Flag Output
      2. 8.3.2 Enable and Start-Up
      3. 8.3.3 Current Limit
      4. 8.3.4 Synchronizing Input
      5. 8.3.5 Input Supply Current
      6. 8.3.6 UVLO and TSD
    4. 8.4 Device Functional Modes
      1. 8.4.1 AUTO Mode
      2. 8.4.2 FPWM Mode
      3. 8.4.3 Dropout
      4. 8.4.4 Input Voltage Frequency Fold-Back
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical and Full-Featured Industrial Application Circuits
        1. 9.2.1.1 Design Parameters
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Setting the Output Voltage
          2. 9.2.1.2.2 Output Capacitors
          3. 9.2.1.2.3 Input Capacitors
          4. 9.2.1.2.4 Inductor
          5. 9.2.1.2.5 VCC
          6. 9.2.1.2.6 BIAS
          7. 9.2.1.2.7 CBOOT
          8. 9.2.1.2.8 Maximum Ambient Temperature
        3. 9.2.1.3 Application Curves
    3. 9.3 Typical Adjustable Industrial Application Circuit
      1. 9.3.1 Design Parameters for Typical Adjustable Output Industrial Power Supply
    4. 9.4 Do's and Don't's
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Ground and Thermal Plane Considerations
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Developmental Support
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Related Links
    4. 12.4 Receiving Notification of Documentation Updates
    5. 12.5 Community Resources
    6. 12.6 Trademarks
    7. 12.7 Electrostatic Discharge Caution
    8. 12.8 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

7 Specifications

7.1 Absolute Maximum Ratings

over the recommended operating junction temperature range of –40°C to 150°C (unless otherwise noted)(1)
PARAMETER MIN MAX UNIT
VIN to AGND, PGND(2) –0.3 40 V
SW to AGND, PGND(3) –0.3 VIN + 0.3 V
CBOOT to SW –0.3 3.6 V
EN to AGND, PGND(2) –0.3 40 V
BIAS to AGND, PGND –0.3 16 V
FB to AGND, PGND : fixed 5 V and 3.3 V –0.3 16 V
FB to AGND, PGND : ADJ –0.3 5.5 V
RESET to AGND, PGND –0.3 8 V
SYNC, FPWM, to AGND, PGND –0.3 5.5 V
VCC to AGND, PGND –0.3 4.2 V
RESET pin current(4) –0.1 1.2 mA
AGND to PGND(5) –0.3 0.3 V
Storage temperature, Tstg –40 150 °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. Values given are D.C.
(2) A maximum of 42 V can be sustained at this pin for a duration of ≤ 500 ms at a duty cycle of ≤ 0.01%.
(3) Transients on this pin, not exceeding –3 V or +40 V, can be tolerated for a duration of ≤ 100 ns. For transients between 40 V and 42 V, see note (2).
(4) Positive current flows into this pin.
(5) A transient voltage of ±2 V can be sustained for ≤1 µs.

7.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) Pins 1, 2, 3, 12, 13, ±1500 V
Pins 11, 5, 8, 9, 6, 7, 4 ±2500
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) Pins 3, 4, 5, 6, 7, 11, 12 and 13 ±750
Pins 1, 2, 8, 9, 15 and 16 ±500
(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.

7.3 Recommended Operating Conditions

over the recommended operating junction temperature range of –40°C to 150°C (unless otherwise noted)
MIN NOM MAX UNIT
Input voltage(3) 3.9 36 V
Output voltage : fixed 5 V(1) 0 5 V
Output voltage : fixed 3.3 V(1) 0 3.3 V
Output voltage adjustment range: ADJ(1)(2) 3.3 10 V
Output current for LM53603 0 3 A
Output current for LM53602 0 2 A
RESET pin current 0 1 mA
Operating junction temperature(4) –40 150 °C
(1) Under no conditions should the output voltage be allowed to fall below zero volts.
(2) An extended output voltage range to 10 V is possible with changes to the typical application schematic. Also, some system specifications are not achieved for output voltages greater than 6 V. Consult the factory for further information.
(3) See System Characteristics for details of input voltage range.
(4) High junction temperatures degrade operating lifetimes. Operating lifetime is de-rated for junction temperatures greater than 125°C.

7.4 Thermal Information

THERMAL METRIC(1) LM53603, LM53602 UNIT
PWP (HTSSOP)
16 PINS
RθJA Junction-to-ambient thermal resistance 42.5 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 22.6 °C/W
RθJB Junction-to-board thermal resistance 16.2 °C/W
ψJT Junction-to-top characterization parameter 0.6 °C/W
ψJB Junction-to-board characterization parameter 16.0 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 1.1 °C/W
(1) The values given in this table are only valid for comparison with other packages and cannot be used for design purposes. These values were calculated in accordance with JESD 51-7, and simulated on a 4-layer JEDEC board. They do not represent the performance obtained in an actual application. For design information please see the Maximum Ambient Temperature section. For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report and the Using New Thermal Metrics (SBVA025) application report.

7.5 Electrical Characteristics

Limits apply to the recommended operating junction temperature range of –40°C to 150°C, unless otherwise noted. Minimum and maximum limits are verified 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. Unless otherwise stated the following conditions apply: VIN = 13.5 V.
PARAMETER TEST CONDITIONS MIN(1) TYP MAX(1) UNIT
VFB Initial reference voltage accuracy for 5-V and 3.3-V options VIN = 3.8 V to 36 V, FPWM,
TJ = 25°C 		–1% 1%
VIN = 3.8 V to 36 V, FPWM –1.25% 1.25%
VREF Reference voltage for ADJ option VIN = 3.8 V to 36 V, FPWM,
TJ = 25°C 		0.993 1 1.007 V
VIN = 3.8 V to 36 V, FPWM,
TJ = –40°C to 125°C		 0.99 1 1.01
VIN-operate Minimum input voltage to operate(2) Rising 3.2 3.95 V
Falling 2.9 3.55
Hysteresis, below 0.34
IQ Operating quiescent current; measured at VIN pin(3)(4) VBIAS = 5 V,
TJ = –40°C to 125°C		 8 13 µA
ISD Shutdown quiescent current; measured at VIN pin EN ≤ 0.4 V, TJ = 25°C 1.7 µA
EN ≤ 0.4 V, TJ = 125°C 3.5
IB Current into the BIAS pin(4) VBIAS = 5 V, FPWM = 3.3 V 47 78 µA
IEN Current into EN pin VIN = VEN = 13.5 V 2.3 µA
IFB Bias current into FB pin ADJ option 10 nA
VRESET RESET upper threshold voltage Rising, % of nominal Vout 105% 107% 110%
RESET lower threshold voltage Falling, % of nominal Vout 92% 94% 96.5%
RESET lower threshold voltage with respect to output voltage Falling, % actual Vout 94.5% 95.7%
VRESET-Hyst RESET hysteresis as a percent of output voltage set point 1.5%
VMIN Minimum input voltage for proper RESET function 50-µA pullup to RESET pin, VEN = 0 V,
TJ = 25°C		 1.5 V
VOL Low level RESET pin output voltage 50-µA pullup to RESET pin, Vin = 1.5 V, EN = 0 V 0.4 V
0.5-mA pullup to RESET pin, Vin = 13.5 V, EN = 0 V 0.4
1-mA pullup to RESET pin, Vin = 13.5 V, EN = 3.3 V 0.4
VEN Enable input threshold voltage Rising 1.7 2 V
Hysteresis, below 0.45 0.55
VEN-off Enable input threshold for full shutdown(5) EN input voltage required for complete shutdown of the regulator, falling. 0.8 V
VLOGIC Logic input levels on FPWM and SYNC pins VIH 1.5 V
VIL 0.4
IHS High-side switch current limit LM53603 4.5 6.2 A
LM53602 2.4 4.4
ILS Low-side switch current limit(6) LM53603 3 3.6 4.3 A
LM53602 2 2.4 2.8
IZC Zero-cross current limit FPWM = 0 V –0.02 A
INEG Negative current limit FPWM = 3.3 V –1.5 A
Rdson Power switch on-resistance High-side MOSFET resistance 135 290 mΩ
Low-side MOSFET resistance 60 125
FSW Switching frequency VIN = 3.8 V to 18 V 1.85 2.1 2.35 MHz
VIN = 36 V 1.2
FSYNC Synchronizing frequency range 1.9 2.1 2.3 MHz
VCC Internal VCC voltage VBIAS = 3.3 V 3.15 V
TSD Thermal shutdown thresholds Rising 162 178 °C
Hysteresis, below 18
(1) Minimum and maximum limits are 100% production tested at 25°C. Limits over the operating temperature range are verified through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) This is the input voltage at which the device starts to operate (rising). The device shuts down when the input voltage goes below this value minus the hysteresis.
(3) This is the current used by the device, open loop. It does not represent the total input current of the system when in regulation. See Isupply in System Characteristics
(4) The FB pin is set to 5.5 V for this test.
(5) Below this voltage on the EN input, the device shuts down completely.
(6) See the Current Limit section for an explanation of valley current limit.

7.6 System Characteristics

The following specifications apply only to the typical application circuit, shown in Figure 15 with nominal component values. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. The parameters in this table are not ensured.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VIN-MIN Minimum input voltage for Vout to stay within ±2% of regulation(2) VOUT = 3.3 V, IOUT = 3 A 3.9 V
VOUT = 3.3 V, IOUT = 1 A 3.55
Regulation Line Regulation VOUT = 5 V, VIN = 8 V to 36 V, IOUT = 3 A 7 mV
VOUT = 3.3 V, VIN = 6 V to 36 V, IOUT = 3 A 5
Load Regulation : Auto Mode VOUT = 5 V, VIN = 12 V, IOUT = 10 µA to 3 A 77 mV
VOUT = 3.3 V, VIN = 12 V, IOUT = 10 µA to 3 A 53
Load Regulation : FPWM Mode VOUT = 5 V, VIN = 12 V, IOUT = 10 µA to 3 A 12 mV
VOUT = 3.3 V, VIN = 12 V, IOUT = 10 µA to 3 A 9
ISUPPLY Input supply current when in regulation(1) VIN = 13.5 V, VOUT = 3.3 V, IOUT = 0 A 24 µA
VIN = 13.5 V, VOUT = 5 V, IOUT = 0 A 34
VDROP Dropout voltage (VIN – VOUT) 5-V Option:
VOUT = 4.95 V, IOUT = 3 A, FSW < 1.85 MHz		 0.7 V
5-V Option:
VOUT = 5 V, IOUT = 3 A, FSW = 1.85 MHz		 1.8
3.3-V Option:
VOUT = 3.27 V, IOUT = 3 A, FSW < 1.85 MHz		 0.65
3.3-V Option:
VOUT = 3.3 V, IOUT = 3 A, FSW = 1.85 MHz		 1.8
(1) Includes current into the EN pin, but does not include current due to the external resistive divider in adjustable output versions. See Input Supply Current section.
(2) This parameter is valid once the input voltage has risen above VIN-operate and the device has started up.

7.7 Timing Requirements

Limits apply to the recommended operating junction temperature range of –40°C to 150°C, unless otherwise noted. Minimum and maximum limits are verified 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. Unless otherwise stated the following conditions apply: VIN = 13.5 V.
MIN NOM MAX UNIT
TON Minimum switch on-time, VIN = 20 V 50 80 ns
TOFF Minimum switch off-time, VIN = 3.8 V 125 200 ns
TRESET-act Delay time to RESET high signal 2 3 4 ms
TRESET-filter Glitch filter time for RESET function 12 25 45 µs
TSS Soft-start time 1 2 3 ms
TEN Turnon delay, CVCC = 1 µF, TJ = 25°C(1) 1 ms
TW Short-circuit wait time (Hiccup time) 5.5 ms
(1) This is the time from the rising edge of EN to the time that the soft-start ramp begins.

7.8 Typical Characteristics

Unless otherwise specified the following conditions apply: VIN = 12 V, TA = 25°C. Specified temperatures are ambient.
LM53602 LM53603 D001_typ_ref_temp_SNVSA42.gif
Figure 1. Reference Voltage for ADJ Device
LM53602 LM53603 D004_typ_HS_ilim_SNVSA42.gif
Figure 3. High-Side Peak Current Limit for LM53603
LM53602 LM53603 D006_typ_SC_current_SNVSA42.gif
Figure 5. Short-Circuit Output Current for LM53603
LM53602 LM53603 D002_typ_freq_temp_SNVSA42.gif
Figure 2. Switching Frequency
LM53602 LM53603 D005_typ_LS_ilim_SNVSA42.gif
Figure 4. Low-Side Valley Current Limit for LM53603
LM53602 LM53603 D003_typ_ISD_SNVSA42.gif
Figure 6. Shutdown Current