Datasheet LTC3126 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | 42V, 2.5A Synchronous Step-Down Regulator with No-Loss Input PowerPath |
| Pages / Page | 30 / 8 — Typical perForMance characTerisTics. TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 2.1 Mb |
| Document Language | English |
Typical perForMance characTerisTics. TA = 25°C, unless otherwise noted. Temperature Rise. Minimum Load for Full Frequency
Model Line for this Datasheet
Text Version of Document
LTC3126
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Temperature Rise Minimum Load for Full Frequency vs Load Current Dropout Voltage vs Load Current Switching (No Pulse Skipping)
60 800 40 f V SW = 700kHz IN = 12V 700 L = 4.7µH VIN = 24V 50 VOUT = 5V 600 30 PWM/SYNC = HIGH 40 500 TAGE (mV) 30 400 20 TURE RISE (°C) 300 20 LOAD CURRENT (mA) TEMPERA DROPOUT VOL 200 f 10 SW = 1MHz 10 f V SW = 2MHz IN = 3.3V V 100 V OUT = 3.3V OUT = 3.3V ON DEMO PCB 0 0 0 0.5 1 1.5 2 2.5 0.0 0.5 1.0 1.5 2.0 2.5 5 10 15 20 25 30 35 40 45 LOAD CURRENT (A) LOAD CURRENT (A) INPUT VOLTAGE (V) 3126 G28 3126 G29 3126 G30
Maximum Input Voltage without Burst Mode Operation Threshold Pulse Skipping vs Input Voltage VREF vs Temperature
45 1000 1.2 fSW = 700kHz, L = 4.7µH 40 fSW = 1MHz, L = 3.3µH 0.8 800 fSW = 2MHz, L = 2.2µH 35 VOUT = 3.3V 0.4 30 600 TAGE (V) 25 0.0 250mA TO 400 20 2.5A LOAD –0.4 INPUT VOL LOAD CURRENT (mA) 15 VOUT = 5V CHANGE FROM 25°C (%) V 200 OUT = 1.8V –0.8 10 VOUT = 3.3V, EXTVCC = VOUT VOUT = 3.3V, EXTVCC = OPEN 5 0 –1.2 600 800 1000 1200 1400 1600 1800 2000 2200 5 10 15 20 25 30 35 40 45 –50 –25 0 25 50 75 100 125 150 SWITCHING FREQUENCY (kHz) INPUT VOLTAGE (V) TEMPERATURE (°C) 3126 G31 3126 G32 3126 G33
Switching Waveforms, Switching Waveforms, PWM Mode Burst Mode Operation Load Step, 0.5A to 1.5A
LOAD INDUCTOR CURRENT CURRENT INDUCTOR 1A/DIV 500mA/DIV CURRENT 200mA/DIV INDUCTOR CURRENT 1A/DIV SW VOUT 10V/DIV 50mV/DIV VOUT 100mV/DIV 200ns/DIV 3126 G34 10µs/DIV 3126 G35 100µs/DIV 3126 G36 24V TO 5V AT 1A 24V TO 5V AT 25mA FRONT PAGE APPLICATION L = 2.2µH L = 2.2µH fSW = 2MHz fSW = 2MHz COUT = 47µF 3126f 8 For more information www.linear.com/LTC3126 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Quick Reference Operation Applications Information Typical Applications Package Description Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Temperature Rise Minimum Load for Full Frequency vs Load Current Dropout Voltage vs Load Current Switching (No Pulse Skipping)
60 800 40 f V SW = 700kHz IN = 12V 700 L = 4.7µH VIN = 24V 50 VOUT = 5V 600 30 PWM/SYNC = HIGH 40 500 TAGE (mV) 30 400 20 TURE RISE (°C) 300 20 LOAD CURRENT (mA) TEMPERA DROPOUT VOL 200 f 10 SW = 1MHz 10 f V SW = 2MHz IN = 3.3V V 100 V OUT = 3.3V OUT = 3.3V ON DEMO PCB 0 0 0 0.5 1 1.5 2 2.5 0.0 0.5 1.0 1.5 2.0 2.5 5 10 15 20 25 30 35 40 45 LOAD CURRENT (A) LOAD CURRENT (A) INPUT VOLTAGE (V) 3126 G28 3126 G29 3126 G30
Maximum Input Voltage without Burst Mode Operation Threshold Pulse Skipping vs Input Voltage VREF vs Temperature
45 1000 1.2 fSW = 700kHz, L = 4.7µH 40 fSW = 1MHz, L = 3.3µH 0.8 800 fSW = 2MHz, L = 2.2µH 35 VOUT = 3.3V 0.4 30 600 TAGE (V) 25 0.0 250mA TO 400 20 2.5A LOAD –0.4 INPUT VOL LOAD CURRENT (mA) 15 VOUT = 5V CHANGE FROM 25°C (%) V 200 OUT = 1.8V –0.8 10 VOUT = 3.3V, EXTVCC = VOUT VOUT = 3.3V, EXTVCC = OPEN 5 0 –1.2 600 800 1000 1200 1400 1600 1800 2000 2200 5 10 15 20 25 30 35 40 45 –50 –25 0 25 50 75 100 125 150 SWITCHING FREQUENCY (kHz) INPUT VOLTAGE (V) TEMPERATURE (°C) 3126 G31 3126 G32 3126 G33
Switching Waveforms, Switching Waveforms, PWM Mode Burst Mode Operation Load Step, 0.5A to 1.5A
LOAD INDUCTOR CURRENT CURRENT INDUCTOR 1A/DIV 500mA/DIV CURRENT 200mA/DIV INDUCTOR CURRENT 1A/DIV SW VOUT 10V/DIV 50mV/DIV VOUT 100mV/DIV 200ns/DIV 3126 G34 10µs/DIV 3126 G35 100µs/DIV 3126 G36 24V TO 5V AT 1A 24V TO 5V AT 25mA FRONT PAGE APPLICATION L = 2.2µH L = 2.2µH fSW = 2MHz fSW = 2MHz COUT = 47µF 3126f 8 For more information www.linear.com/LTC3126 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Quick Reference Operation Applications Information Typical Applications Package Description Typical Application Related Parts
