Datasheet LT1765, LT1765-1.8, LT1765-2.5, LT1765-3.3, LT1765-5 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Monolithic 3A, 1.25MHz Step-Down Switching Regulator |
| Pages / Page | 20 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Minimum Input Voltage for 2.5V Out. … |
| File Format / Size | PDF / 216 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. Minimum Input Voltage for 2.5V Out. SHDN Supply Current. Input Supply Current
Model Line for this Datasheet
Text Version of Document
LT1765/LT1765-1.8/LT1765-2.5/ LT1765-3.3/LT1765-5
TYPICAL PERFORMANCE CHARACTERISTICS Minimum Input Voltage for 2.5V Out SHDN Supply Current
3.5 300 VIN = 15V 250 3.3 200 3.1 150 2.9 CURRENT (μA) IN INPUT VOLTAGE (V) V 100 2.7 50 2.5 0 0.001 0.01 0.1 1 0 0.2 0.4 0.6 0.8 1 1.2 1.4 LOAD CURRENT (A) SHUTDOWN VOLTAGE (V) 1765 G07 1765 G08
Input Supply Current Current Limit Foldback
1200 4 40 1000 FB INPUT CURRENT (μA) UNDERVOLTAGE 3 30 800 LOCKOUT SWITCH CURRENT 600 2 20 CURRENT (μA) INV 400 1 10 SWITCH PEAK CURRENT (A) 200 FB CURRENT 0 0 0 0 5 10 15 20 25 30 0 0.2 0.4 0.6 0.8 1 1.2 INPUT VOLTAGE (V) FEEDBACK VOLTAGE (V) 1765 G09 1765 G10
Maximum Load Current, Maximum Load Current, VOUT = 5V VOUT = 2.5V
3.0 3.0 2.8 L = 4.7μH L = 4.7μH 2.8 2.6 L = 2.2μH 2.6 2.4 L = 2.2μH L = 1.5μH OUTPUT CURRENT (A) OUTPUT CURRENT (A) 2.4 2.2 L = 1.5μH 2.0 2.2 0 5 10 15 20 25 0 5 10 15 20 25 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1765 G11 1765 G12 1765fd 5
TYPICAL PERFORMANCE CHARACTERISTICS Minimum Input Voltage for 2.5V Out SHDN Supply Current
3.5 300 VIN = 15V 250 3.3 200 3.1 150 2.9 CURRENT (μA) IN INPUT VOLTAGE (V) V 100 2.7 50 2.5 0 0.001 0.01 0.1 1 0 0.2 0.4 0.6 0.8 1 1.2 1.4 LOAD CURRENT (A) SHUTDOWN VOLTAGE (V) 1765 G07 1765 G08
Input Supply Current Current Limit Foldback
1200 4 40 1000 FB INPUT CURRENT (μA) UNDERVOLTAGE 3 30 800 LOCKOUT SWITCH CURRENT 600 2 20 CURRENT (μA) INV 400 1 10 SWITCH PEAK CURRENT (A) 200 FB CURRENT 0 0 0 0 5 10 15 20 25 30 0 0.2 0.4 0.6 0.8 1 1.2 INPUT VOLTAGE (V) FEEDBACK VOLTAGE (V) 1765 G09 1765 G10
Maximum Load Current, Maximum Load Current, VOUT = 5V VOUT = 2.5V
3.0 3.0 2.8 L = 4.7μH L = 4.7μH 2.8 2.6 L = 2.2μH 2.6 2.4 L = 2.2μH L = 1.5μH OUTPUT CURRENT (A) OUTPUT CURRENT (A) 2.4 2.2 L = 1.5μH 2.0 2.2 0 5 10 15 20 25 0 5 10 15 20 25 INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1765 G11 1765 G12 1765fd 5
