Datasheet ADP2381 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | 20 V, 6 A Synchronous Step-Down Regulator with Low-Side Driver |
| Pages / Page | 28 / 7 — Data Sheet. ADP2381. TYPICAL PERFORMANCE CHARACTERISTICS. 100. NCY. ICI. … |
| File Format / Size | PDF / 857 Kb |
| Document Language | English |
Data Sheet. ADP2381. TYPICAL PERFORMANCE CHARACTERISTICS. 100. NCY. ICI. VOUT = 1.2V. VOUT = 1.8V. VOUT = 2.5V. INDUCTOR: FDVE1040-2R2M
Model Line for this Datasheet
Text Version of Document
Data Sheet ADP2381 TYPICAL PERFORMANCE CHARACTERISTICS
Operating conditions: TA = 25oC, VIN = 12 V, VOUT = 3.3 V, L = 2.2 µH, COUT = 2 × 100 µF, fSW = 500 kHz, unless otherwise noted.
100 100 95 95 90 90 85 85 %) %) ( 80 ( 80 NCY 75 NCY E 75 E ICI ICI F 70 F 70 F F E E 65 65 VOUT = 1.2V VOUT = 1.2V 60 VOUT = 1.8V 60 VOUT = 1.8V VOUT = 2.5V VOUT = 2.5V 55 INDUCTOR: FDVE1040-2R2M VOUT = 3.3V 55 INDUCTOR: FDVE1040-4R7M VOUT = 3.3V MOSFET: FDS6298 VOUT = 5V MOSFET: FDS6298 VOUT = 5V 50 50 0 1 2 3 4 5 6
004
0 1 2 3 4 5 6
007
OUTPUT CURRENT (A)
10209-
OUTPUT CURRENT (A)
10209- Figure 4. Efficiency at VIN = 12 V, fSW = 500 kHz Figure 7. Efficiency at VIN = 12 V, fSW = 250 kHz
100 100 95 95 90 90 85 85 %) %) ( 80 ( 80 NCY 75 NCY E 75 E ICI ICI F 70 F 70 F F E E V 65 65 OUT = 1.0V VOUT = 1.2V V 60 VOUT = 1.8V 60 OUT = 1.5V V V OUT = 2.5V OUT = 1.8V V 55 INDUCTOR: FDVE1040-3R3M VOUT = 3.3V 55 INDUCTOR: 744 333 0100 OUT = 2.5V MOSFET: FDS6298 V V OUT = 5V MOSFET: FDS6298 OUT = 3.3V 50 50 0 1 2 3 4 5 6
005
0 1 2 3 4 5 6
008
OUTPUT CURRENT (A)
10209-
OUTPUT CURRENT (A)
10209- Figure 5. Efficiency at VIN = 18 V, fSW = 500 kHz Figure 8. Efficiency at VIN = 5 V, fSW = 500 kHz
160 3.20 150 3.00 140 (μA) mA) 2.80 ( NT NT 130 2.60 CURRE N CURRE 120 W 2.40 NT DO CE S E 110 2.20 SHUT UI Q TJ = –40°C TJ = –40°C 100 2.00 TJ = +25°C TJ = +25°C TJ = +125°C TJ = +125°C 90 1.80
006
4 6 8 10 12 14 16 18 20 4 6 8 10 12 14 16 18 20
009
V
10209-
IN (V) VIN (V)
10209- Figure 6. Shutdown Current vs. VIN Figure 9. Quiescent Current vs. VIN Rev. 0 | Page 7 of 28 Document Outline Features Applications Typical Applications Circuit General Description Revision History Specifications Absolute Maximum Ratings Thermal Information ESD Caution Pin Configuration and Function Description Typical Performance Characteristics Functional Block Diagram Theory of Operation Control Scheme Internal Regulator (VREG) Bootstrap Circuitry Low-Side Driver Oscillator Synchronization Enable and Soft Start Power Good Peak Current Limit and Short-Circuit Protection Overvoltage Protection (OVP) Undervoltage Lockout (UVLO) Thermal Shutdown Applications Information Input Capacitor Selection Output Voltage Setting Voltage Conversion Limitations Inductor Selection Output Capacitor Selection Low-Side Power Device Selection Programming Input Voltage UVLO Compensation Design Compensation Network Between COMP and GND Compensation Network Between COMP and FB ADIsimPower Design Tool Design Example Output Voltage Setting Frequency Setting Inductor Selection Output Capacitor Selection Low-Side MOSFET Selection Compensation Components Soft Start Time Program Input Capacitor Selection Schematic of Design Example External Components Recommendation Circuit Board Layout Recommendations Typical Application Circuits Outline Dimensions Ordering Guide
Operating conditions: TA = 25oC, VIN = 12 V, VOUT = 3.3 V, L = 2.2 µH, COUT = 2 × 100 µF, fSW = 500 kHz, unless otherwise noted.
100 100 95 95 90 90 85 85 %) %) ( 80 ( 80 NCY 75 NCY E 75 E ICI ICI F 70 F 70 F F E E 65 65 VOUT = 1.2V VOUT = 1.2V 60 VOUT = 1.8V 60 VOUT = 1.8V VOUT = 2.5V VOUT = 2.5V 55 INDUCTOR: FDVE1040-2R2M VOUT = 3.3V 55 INDUCTOR: FDVE1040-4R7M VOUT = 3.3V MOSFET: FDS6298 VOUT = 5V MOSFET: FDS6298 VOUT = 5V 50 50 0 1 2 3 4 5 6
004
0 1 2 3 4 5 6
007
OUTPUT CURRENT (A)
10209-
OUTPUT CURRENT (A)
10209- Figure 4. Efficiency at VIN = 12 V, fSW = 500 kHz Figure 7. Efficiency at VIN = 12 V, fSW = 250 kHz
100 100 95 95 90 90 85 85 %) %) ( 80 ( 80 NCY 75 NCY E 75 E ICI ICI F 70 F 70 F F E E V 65 65 OUT = 1.0V VOUT = 1.2V V 60 VOUT = 1.8V 60 OUT = 1.5V V V OUT = 2.5V OUT = 1.8V V 55 INDUCTOR: FDVE1040-3R3M VOUT = 3.3V 55 INDUCTOR: 744 333 0100 OUT = 2.5V MOSFET: FDS6298 V V OUT = 5V MOSFET: FDS6298 OUT = 3.3V 50 50 0 1 2 3 4 5 6
005
0 1 2 3 4 5 6
008
OUTPUT CURRENT (A)
10209-
OUTPUT CURRENT (A)
10209- Figure 5. Efficiency at VIN = 18 V, fSW = 500 kHz Figure 8. Efficiency at VIN = 5 V, fSW = 500 kHz
160 3.20 150 3.00 140 (μA) mA) 2.80 ( NT NT 130 2.60 CURRE N CURRE 120 W 2.40 NT DO CE S E 110 2.20 SHUT UI Q TJ = –40°C TJ = –40°C 100 2.00 TJ = +25°C TJ = +25°C TJ = +125°C TJ = +125°C 90 1.80
006
4 6 8 10 12 14 16 18 20 4 6 8 10 12 14 16 18 20
009
V
10209-
IN (V) VIN (V)
10209- Figure 6. Shutdown Current vs. VIN Figure 9. Quiescent Current vs. VIN Rev. 0 | Page 7 of 28 Document Outline Features Applications Typical Applications Circuit General Description Revision History Specifications Absolute Maximum Ratings Thermal Information ESD Caution Pin Configuration and Function Description Typical Performance Characteristics Functional Block Diagram Theory of Operation Control Scheme Internal Regulator (VREG) Bootstrap Circuitry Low-Side Driver Oscillator Synchronization Enable and Soft Start Power Good Peak Current Limit and Short-Circuit Protection Overvoltage Protection (OVP) Undervoltage Lockout (UVLO) Thermal Shutdown Applications Information Input Capacitor Selection Output Voltage Setting Voltage Conversion Limitations Inductor Selection Output Capacitor Selection Low-Side Power Device Selection Programming Input Voltage UVLO Compensation Design Compensation Network Between COMP and GND Compensation Network Between COMP and FB ADIsimPower Design Tool Design Example Output Voltage Setting Frequency Setting Inductor Selection Output Capacitor Selection Low-Side MOSFET Selection Compensation Components Soft Start Time Program Input Capacitor Selection Schematic of Design Example External Components Recommendation Circuit Board Layout Recommendations Typical Application Circuits Outline Dimensions Ordering Guide
