Datasheet LT3505 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | 1.2A, Step-Down Switching Regulator in 3mm × 3mm DFN |
| Pages / Page | 24 / 4 — Effi ciency (VOUT = 5V, L = 10µH,. Effi ciency (VOUT = 3.3V, L = 10µH,. … |
| File Format / Size | PDF / 832 Kb |
| Document Language | English |
Effi ciency (VOUT = 5V, L = 10µH,. Effi ciency (VOUT = 3.3V, L = 10µH,. Effi ciency (VOUT = 3.3V,. fSW = 750kHz)
Model Line for this Datasheet
Text Version of Document
LT3505 TYPICAL PERFORMANCE CHARACTERISTICS
Effi ciency (VOUT = 5V, L = 10µH, Effi ciency (VOUT = 3.3V, L = 10µH, Effi ciency (VOUT = 3.3V, fSW = 750kHz) fSW = 750kHz) L = 4.7µH, fSW = 2.2MHz)
95 95 95 TA = 25°C TA = 25°C TA = 25°C 90 90 90 85 85 85 80 80 80 75 75 75 70 70 70 EFFICIENCY (%) 65 EFFICIENCY (%) 65 EFFICIENCY (%) 65 60 60 60 VIN = 8V VIN = 8V 55 VIN = 12V 55 VIN = 12V 55 VIN = 8V VIN = 24V VIN = 24V VIN = 12V 50 50 50 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A)
Effi ciency (VOUT = 5V, L = 4.7µH, Max Load Current (VOUT = 3.3V, Max Load Current (VOUT = 5V, fSW = 2.2MHz) L = 6.8µH, fSW = 750kHz) fSW = 750kHz)
95 1.7 1.7 TA = 25°C TA = 25°C TA = 25°C 90 1.6 1.6 TYPICAL, L = 22µH TYPICAL 85 1.5 1.5 TYPICAL, L = 10µH 80 1.4 1.4 MINIMUM 75 1.3 1.3 MINIMUM, L = 10µH 70 1.2 1.2 EFFICIENCY (%) 65 1.1 1.1 OUTPUT CURRENT (A) *10% DROPOUT OUTPUT CURRENT (A) *10% DROPOUT 60 1.0 1.0 55 VIN = 8V 0.9 0.9 VIN = 12V 50 0.8 0.8 0 0.2 0.4 0.6 0.8 1.0 1.2 5 7 9 11 13 15 17 19 6 8 10 12 14 16 18 20 22 24 26 28 30 LOAD CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3505 G05 3505 G06
Max Load Current (VOUT = 3.3V, Max Load Current (VOUT = 5V, L = 2.2µH, fSW = 2.2MHz) L = 3.3µH, fSW = 2.2MHz) Switch Voltage Drop
1.8 1.80 500 TA = 25°C TA = 25°C 1.7 1.70 450 1.6 1.60 400 TYPICAL T 1.5 1.50 A = 85°C 350 TYPICAL T 1.4 1.40 A = 25°C (mV) 300 1.3 1.30 250 MINIMUM MINIMUM T 1.2 1.20 A = –45°C 200 V CE(SWITCH) OUTPUT CURRENT (A) 1.1 OUTPUT CURRENT (A) 1.10 150 1.0 1.00 100 *10% DROPOUT *10% DROPOUT 0.9 0.90 50 0.8 0.80 0 5 6 7 8 9 10 11 12 7 8 9 10 11 12 14 16 18 0 300 600 900 1200 1500 INPUT VOLTAGE (V) INPUT VOLTAGE (V) SWITCH CURRENT (mA) 3505 G07 3505 G08 3505 G09 3505fc 4
Effi ciency (VOUT = 5V, L = 10µH, Effi ciency (VOUT = 3.3V, L = 10µH, Effi ciency (VOUT = 3.3V, fSW = 750kHz) fSW = 750kHz) L = 4.7µH, fSW = 2.2MHz)
95 95 95 TA = 25°C TA = 25°C TA = 25°C 90 90 90 85 85 85 80 80 80 75 75 75 70 70 70 EFFICIENCY (%) 65 EFFICIENCY (%) 65 EFFICIENCY (%) 65 60 60 60 VIN = 8V VIN = 8V 55 VIN = 12V 55 VIN = 12V 55 VIN = 8V VIN = 24V VIN = 24V VIN = 12V 50 50 50 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A)
Effi ciency (VOUT = 5V, L = 4.7µH, Max Load Current (VOUT = 3.3V, Max Load Current (VOUT = 5V, fSW = 2.2MHz) L = 6.8µH, fSW = 750kHz) fSW = 750kHz)
95 1.7 1.7 TA = 25°C TA = 25°C TA = 25°C 90 1.6 1.6 TYPICAL, L = 22µH TYPICAL 85 1.5 1.5 TYPICAL, L = 10µH 80 1.4 1.4 MINIMUM 75 1.3 1.3 MINIMUM, L = 10µH 70 1.2 1.2 EFFICIENCY (%) 65 1.1 1.1 OUTPUT CURRENT (A) *10% DROPOUT OUTPUT CURRENT (A) *10% DROPOUT 60 1.0 1.0 55 VIN = 8V 0.9 0.9 VIN = 12V 50 0.8 0.8 0 0.2 0.4 0.6 0.8 1.0 1.2 5 7 9 11 13 15 17 19 6 8 10 12 14 16 18 20 22 24 26 28 30 LOAD CURRENT (A) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3505 G05 3505 G06
Max Load Current (VOUT = 3.3V, Max Load Current (VOUT = 5V, L = 2.2µH, fSW = 2.2MHz) L = 3.3µH, fSW = 2.2MHz) Switch Voltage Drop
1.8 1.80 500 TA = 25°C TA = 25°C 1.7 1.70 450 1.6 1.60 400 TYPICAL T 1.5 1.50 A = 85°C 350 TYPICAL T 1.4 1.40 A = 25°C (mV) 300 1.3 1.30 250 MINIMUM MINIMUM T 1.2 1.20 A = –45°C 200 V CE(SWITCH) OUTPUT CURRENT (A) 1.1 OUTPUT CURRENT (A) 1.10 150 1.0 1.00 100 *10% DROPOUT *10% DROPOUT 0.9 0.90 50 0.8 0.80 0 5 6 7 8 9 10 11 12 7 8 9 10 11 12 14 16 18 0 300 600 900 1200 1500 INPUT VOLTAGE (V) INPUT VOLTAGE (V) SWITCH CURRENT (mA) 3505 G07 3505 G08 3505 G09 3505fc 4
