Datasheet LTC3700 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | Constant Frequency Step-Down DC/DC Controller with LDO Regulator |
| Pages / Page | 16 / 5 — TYPICAL PERFOR A CE CHARACTERISTICS. LDO REGULATOR. LDO Line Regulation … |
| File Format / Size | PDF / 221 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. LDO REGULATOR. LDO Line Regulation (VFB2. VFB2 Voltage vs Temperature. Voltage vs Supply)
Model Line for this Datasheet
Text Version of Document
LTC3700
W U TYPICAL PERFOR A CE CHARACTERISTICS LDO REGULATOR LDO Line Regulation (VFB2 VFB2 Voltage vs Temperature Voltage vs Supply)
850 850 V T 840 IN2 = 4.2V 840 A = 25°C LDO = VFB2 LDO = VFB2 830 830 820 ILOAD = 1mA 820 I I LOAD = 10µA LOAD = 1mA 810 810 ILOAD = 10µA 800 800 VOLTAGE (mV) 790 VOLTAGE (mV) I 790 LOAD = 10mA I FB2 FB2 LOAD = 10mA V 780 V 780 ILOAD = 100mA ILOAD = 100mA 770 770 760 760 750 750 –55 –35 –15 5 25 45 65 85 105 125 2.4 2.85 3.3 3.75 4.2 4.65 5.1 5.55 6 TEMPERATURE (°C) VIN2 INPUT VOLTAGE (V) 3700 G06 3700 G07
LDO Pass FET RON vs Input Voltage PGOOD RON vs Input Voltage
4.0 300 V V 3.7 IN = 0 270 IN2 = 0V ILDO = 100mA VPGOOD = 100mV 3.4 TA = 25°C 240 TA = 25°C 3.1 ) 210 Ω 2.8 ( ) 180 Ω ON ( 2.5 150 ONR 2.2 120 PGOOD R 1.9 90 1.6 60 1.3 30 1.0 0 2 2.5 3 3.5 4 4.5 5 5.5 6 2 3 4 5 6 7 8 9 10 V V IN2 INPUT VOLTAGE (V) IN INPUT VOLTAGE (V) 3700 G08 3700 G09
LDO Supply Current vs Input Voltage Load Transient Response
120 LDO = VFB2 110 ILDO = 10µA 150 V T IN = 0V 100 A = 25°C 100 µA) ILDO (mA) 90 50mA/DIV 50 80 0 70 ∆V 60 LDO 0 V 20mV/DIV IN = 9.8V SUPPLY CURRENT ( 50 AC COUPLED IN2V 40 T 30 A = 25°C 20µs/DIV 3700 G12 VIN2 = 3.3V 20 VLDO = 2.5V 2 2.5 3 3.5 4 4.5 5 5.5 6 CLDO = 10µF VIN2 INPUT VOLTAGE (V) 3700 G11 3700f 5
W U TYPICAL PERFOR A CE CHARACTERISTICS LDO REGULATOR LDO Line Regulation (VFB2 VFB2 Voltage vs Temperature Voltage vs Supply)
850 850 V T 840 IN2 = 4.2V 840 A = 25°C LDO = VFB2 LDO = VFB2 830 830 820 ILOAD = 1mA 820 I I LOAD = 10µA LOAD = 1mA 810 810 ILOAD = 10µA 800 800 VOLTAGE (mV) 790 VOLTAGE (mV) I 790 LOAD = 10mA I FB2 FB2 LOAD = 10mA V 780 V 780 ILOAD = 100mA ILOAD = 100mA 770 770 760 760 750 750 –55 –35 –15 5 25 45 65 85 105 125 2.4 2.85 3.3 3.75 4.2 4.65 5.1 5.55 6 TEMPERATURE (°C) VIN2 INPUT VOLTAGE (V) 3700 G06 3700 G07
LDO Pass FET RON vs Input Voltage PGOOD RON vs Input Voltage
4.0 300 V V 3.7 IN = 0 270 IN2 = 0V ILDO = 100mA VPGOOD = 100mV 3.4 TA = 25°C 240 TA = 25°C 3.1 ) 210 Ω 2.8 ( ) 180 Ω ON ( 2.5 150 ONR 2.2 120 PGOOD R 1.9 90 1.6 60 1.3 30 1.0 0 2 2.5 3 3.5 4 4.5 5 5.5 6 2 3 4 5 6 7 8 9 10 V V IN2 INPUT VOLTAGE (V) IN INPUT VOLTAGE (V) 3700 G08 3700 G09
LDO Supply Current vs Input Voltage Load Transient Response
120 LDO = VFB2 110 ILDO = 10µA 150 V T IN = 0V 100 A = 25°C 100 µA) ILDO (mA) 90 50mA/DIV 50 80 0 70 ∆V 60 LDO 0 V 20mV/DIV IN = 9.8V SUPPLY CURRENT ( 50 AC COUPLED IN2V 40 T 30 A = 25°C 20µs/DIV 3700 G12 VIN2 = 3.3V 20 VLDO = 2.5V 2 2.5 3 3.5 4 4.5 5 5.5 6 CLDO = 10µF VIN2 INPUT VOLTAGE (V) 3700 G11 3700f 5
