Datasheet LTM4647 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | 30A DC/DC Step-Down μModule Regulator |
| Pages / Page | 34 / 8 — PIN FUNCTIONS V. OSNS (G5):. OSNS (G6):. COMPb (H7):. PGOOD (G7):. VOUT … |
| File Format / Size | PDF / 1.1 Mb |
| Document Language | English |
PIN FUNCTIONS V. OSNS (G5):. OSNS (G6):. COMPb (H7):. PGOOD (G7):. VOUT (J1-J4, K1-K4, L1-L7):. COMPa (H6):. TEMP+ (F1):. TEMP– (E1):
Model Line for this Datasheet
Text Version of Document
LTM4647
PIN FUNCTIONS V – OSNS (G5):
Input to the Remote Sense Amplifier. This connect an R-C compensation network from COMPa to pin connects to the ground remote sense point at the SGND. Tie COMPa pins together in parallel operation. See output load. the Applications Information section.
V + OSNS (G6):
Input to the Remote Sense Amplifier. In-
COMPb (H7):
Internal Loop Compensation Networks. Tie to ternally, this pin is connected to VFB with a 60.4k 0.5% COMPa to provide internal loop compensation for majority precision resistor. of applications. Float this pin if internal loop compensation
PGOOD (G7):
Output Voltage Power Good Indicator. not used. See COMPa description. Open-drain logic output that is pulled to ground when the
VOUT (J1-J4, K1-K4, L1-L7):
Power Output Pins. Apply output voltage is not within ±7.5% of the regulation point. output load between these pins and GND pins. Recommend
COMPa (H6):
Current Control Threshold and Error Am- placing output decoupling capacitance directly between plifier Compensation Point. The current comparator these pins and GND pins. See Table 1. threshold increases with this control voltage. Small filter
TEMP+ (F1):
Temperature Monitor. An internal diode con- capacitor (10pF) internal to LTM4647 on this pin provides nected PNP transistor. See the Applications Information good noise rejection in the control loop. Tie to COMPb section. pin to use internal compensation in the vast majority of
TEMP– (E1):
Low Side of the Internal Temperature Monitor. applications. Whereas, when more specialized applica- tions require an optimization of control loop response,
BLOCK DIAGRAM
2.2Ω 1µF RUN CLKOUT HIZB INTVCC COMPa PGOOD COMPb 10pF 3300pF 47pF 2k VIN VIN + 6V TO 15V 2.2µF SVIN CIN M1 PHASMD 0.12µH VOUT VOUT 1V FREQ + POWER 30A M2 1µF C R OUT FREQ CONTROL GND 47.5k SGND INTVCC INTVCC INTVCC – VSNS– 4.7µF 0.1µF DIFF 90.9k DVRVCC AMP + VFB TRACK/SS 60.4k 0.1µF VSNS+ MODE/PLLIN 4647 F01
Figure 1. Simplified LTM4647 Block Diagram
4647fb 8 For more information www.linear.com/LTM4647 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications
PIN FUNCTIONS V – OSNS (G5):
Input to the Remote Sense Amplifier. This connect an R-C compensation network from COMPa to pin connects to the ground remote sense point at the SGND. Tie COMPa pins together in parallel operation. See output load. the Applications Information section.
V + OSNS (G6):
Input to the Remote Sense Amplifier. In-
COMPb (H7):
Internal Loop Compensation Networks. Tie to ternally, this pin is connected to VFB with a 60.4k 0.5% COMPa to provide internal loop compensation for majority precision resistor. of applications. Float this pin if internal loop compensation
PGOOD (G7):
Output Voltage Power Good Indicator. not used. See COMPa description. Open-drain logic output that is pulled to ground when the
VOUT (J1-J4, K1-K4, L1-L7):
Power Output Pins. Apply output voltage is not within ±7.5% of the regulation point. output load between these pins and GND pins. Recommend
COMPa (H6):
Current Control Threshold and Error Am- placing output decoupling capacitance directly between plifier Compensation Point. The current comparator these pins and GND pins. See Table 1. threshold increases with this control voltage. Small filter
TEMP+ (F1):
Temperature Monitor. An internal diode con- capacitor (10pF) internal to LTM4647 on this pin provides nected PNP transistor. See the Applications Information good noise rejection in the control loop. Tie to COMPb section. pin to use internal compensation in the vast majority of
TEMP– (E1):
Low Side of the Internal Temperature Monitor. applications. Whereas, when more specialized applica- tions require an optimization of control loop response,
BLOCK DIAGRAM
2.2Ω 1µF RUN CLKOUT HIZB INTVCC COMPa PGOOD COMPb 10pF 3300pF 47pF 2k VIN VIN + 6V TO 15V 2.2µF SVIN CIN M1 PHASMD 0.12µH VOUT VOUT 1V FREQ + POWER 30A M2 1µF C R OUT FREQ CONTROL GND 47.5k SGND INTVCC INTVCC INTVCC – VSNS– 4.7µF 0.1µF DIFF 90.9k DVRVCC AMP + VFB TRACK/SS 60.4k 0.1µF VSNS+ MODE/PLLIN 4647 F01
Figure 1. Simplified LTM4647 Block Diagram
4647fb 8 For more information www.linear.com/LTM4647 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications
