Datasheet ADP2390 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 18 V, 12 A Step-Down Regulator with Programmable Current Limit and PFM |
| 页数 / 页 | 23 / 4 — ADP2389/ADP2390. Data Sheet. SPECIFICATIONS. Table 1. Parameter. Symbol. … |
| 文件格式/大小 | PDF / 786 Kb |
| 文件语言 | 英语 |
ADP2389/ADP2390. Data Sheet. SPECIFICATIONS. Table 1. Parameter. Symbol. Test Conditions/Comments. Min. Typ. Max. Units
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ADP2389/ADP2390 Data Sheet SPECIFICATIONS
VPVIN = VVIN = 12 V, TJ = −40°C to +125°C for minimum/maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted.
Table 1. Parameter Symbol Test Conditions/Comments Min Typ Max Units
SUPPLY VOLTAGE (PVIN AND VIN) PVIN Voltage Range VPVIN 4.5 18 V VIN Voltage Range VVIN 4.5 18 V Quiescent Current IQ No switching 1.16 1.5 mA Shutdown Current ISHDN EN = GND 7.5 20 µA VIN Undervoltage Lockout Threshold UVLO VIN rising 4.2 4.4 V VIN falling 3.5 3.7 V FEEDBACK (FB) FB Regulation Voltage VFB 0°C < TJ < 85°C 0.597 0.6 0.603 V −40°C < TJ < +125°C 0.594 0.6 0.606 V FB Bias Current IFB 0.01 0.1 µA ERROR AMPLIFIER (EA) Transconductance gm 450 500 550 µS EA Source Current ISOURCE 40 50 60 µA EA Sink Current ISINK 40 50 60 µA INTERNAL REGULATOR (VREG) VREG Voltage VVREG IVREG = 10 mA 4.8 5 5.2 V Dropout Voltage IVREG = 50 mA 355 mV Regulator Current Limit 100 mA SWITCH NODE (SW) On Resistance1 High-Side RDSON_H VBOOT = 5 V 17 30 mΩ Low-Side RDSON_L VVREG = 5 V 4.5 9 mΩ SW Minimum On Time2 tMIN_ON 100 ns SW Minimum Off Time2 tMIN_OFF 150 ns CURRENT LIMIT ILIM Voltage VILIM 0.592 V ILIM Current Range IILIM 1.8 12 µA High-Side Peak Current Limit IOCP RILIM = 59 kΩ 15 16.8 18.6 A Low-Side Negative Current Limit2 4 A BST Bootstrap Voltage VBOOT 4.6 5 5.4 V OSCILLATOR (RT) Switching Frequency fSW RT = 100 kΩ 540 600 660 kHz Switching Frequency Range 200 2200 kHz FAST TRANSIENT WINDOW (FTW) Fast Transient Response Window RFTW = 100 kΩ ±2 % Minimum Fast Transient Response Window2 ±1 % SS SS Pin Pull-Up Current ISS 2.7 3.4 4.1 µA Rev. 0 | Page 4 of 23 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL INFORMATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PFM MODE (ADP2390 ONLY) PRECISION ENABLE/SHUTDOWN INTERNAL REGULATOR (VREG) BOOTSTRAP CIRCUITRY OSCILLATOR SOFT START FAST TRANSIENT RESPONSE 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 INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION PROGRAMMING INPUT VOLTAGE UVLO COMPENSATION DESIGN DESIGN EXAMPLE OUTPUT VOLTAGE SETTING FREQUENCY SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION COMPENSATION COMPONENTS SOFT START TIME PROGRAM INPUT CAPACITOR SELECTION SCHEMATIC FOR DESIGN EXAMPLE EXTERNAL COMPONENTS RECOMMENDATION CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE
ADP2389/ADP2390 Data Sheet SPECIFICATIONS
VPVIN = VVIN = 12 V, TJ = −40°C to +125°C for minimum/maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted.
Table 1. Parameter Symbol Test Conditions/Comments Min Typ Max Units
SUPPLY VOLTAGE (PVIN AND VIN) PVIN Voltage Range VPVIN 4.5 18 V VIN Voltage Range VVIN 4.5 18 V Quiescent Current IQ No switching 1.16 1.5 mA Shutdown Current ISHDN EN = GND 7.5 20 µA VIN Undervoltage Lockout Threshold UVLO VIN rising 4.2 4.4 V VIN falling 3.5 3.7 V FEEDBACK (FB) FB Regulation Voltage VFB 0°C < TJ < 85°C 0.597 0.6 0.603 V −40°C < TJ < +125°C 0.594 0.6 0.606 V FB Bias Current IFB 0.01 0.1 µA ERROR AMPLIFIER (EA) Transconductance gm 450 500 550 µS EA Source Current ISOURCE 40 50 60 µA EA Sink Current ISINK 40 50 60 µA INTERNAL REGULATOR (VREG) VREG Voltage VVREG IVREG = 10 mA 4.8 5 5.2 V Dropout Voltage IVREG = 50 mA 355 mV Regulator Current Limit 100 mA SWITCH NODE (SW) On Resistance1 High-Side RDSON_H VBOOT = 5 V 17 30 mΩ Low-Side RDSON_L VVREG = 5 V 4.5 9 mΩ SW Minimum On Time2 tMIN_ON 100 ns SW Minimum Off Time2 tMIN_OFF 150 ns CURRENT LIMIT ILIM Voltage VILIM 0.592 V ILIM Current Range IILIM 1.8 12 µA High-Side Peak Current Limit IOCP RILIM = 59 kΩ 15 16.8 18.6 A Low-Side Negative Current Limit2 4 A BST Bootstrap Voltage VBOOT 4.6 5 5.4 V OSCILLATOR (RT) Switching Frequency fSW RT = 100 kΩ 540 600 660 kHz Switching Frequency Range 200 2200 kHz FAST TRANSIENT WINDOW (FTW) Fast Transient Response Window RFTW = 100 kΩ ±2 % Minimum Fast Transient Response Window2 ±1 % SS SS Pin Pull-Up Current ISS 2.7 3.4 4.1 µA Rev. 0 | Page 4 of 23 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL INFORMATION ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONTROL SCHEME PFM MODE (ADP2390 ONLY) PRECISION ENABLE/SHUTDOWN INTERNAL REGULATOR (VREG) BOOTSTRAP CIRCUITRY OSCILLATOR SOFT START FAST TRANSIENT RESPONSE 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 INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION PROGRAMMING INPUT VOLTAGE UVLO COMPENSATION DESIGN DESIGN EXAMPLE OUTPUT VOLTAGE SETTING FREQUENCY SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION COMPENSATION COMPONENTS SOFT START TIME PROGRAM INPUT CAPACITOR SELECTION SCHEMATIC FOR DESIGN EXAMPLE EXTERNAL COMPONENTS RECOMMENDATION CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUITS OUTLINE DIMENSIONS ORDERING GUIDE