Datasheet LTM4601A, LTM4601A-1 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | 12A μModule (Power Module) Regulators with PLL, Output Tracking and Margining |
| Pages / Page | 30 / 7 — PIN FUNCTIONS (See Package Description for Pin Assignment) VIN (Bank 1):. … |
| File Format / Size | PDF / 532 Kb |
| Document Language | English |
PIN FUNCTIONS (See Package Description for Pin Assignment) VIN (Bank 1):. PLLIN (Pin A8):. OUT (Bank 3):. TRACK/SS (Pin A9):
Model Line for this Datasheet
Text Version of Document
LTM4601A/LTM4601A-1
PIN FUNCTIONS (See Package Description for Pin Assignment) VIN (Bank 1):
Power Input Pins. Apply input voltage be-
PLLIN (Pin A8):
External Clock Synchronization Input to tween these pins and PGND pins. Recommend placing the Phase Detector. This pin is internally terminated to input decoupling capacitance directly between VIN pins SGND with a 50k resistor. Apply a clock with high level and PGND pins. above 2V and below INTVCC. See the Applications Infor-
V
mation section.
OUT (Bank 3):
Power Output Pins. Apply output load between these pins and PGND pins. Recommend placing
TRACK/SS (Pin A9):
Output Voltage Tracking and Soft- output decoupling capacitance directly between these pins Start Pin. When the module is configured as a master and PGND pins. See Figure 15. output, then a soft-start capacitor is placed on this pin
PGND (Bank 2):
Power ground pins for both input and to ground to control the master ramp rate. A soft-start output returns. capacitor can be used for soft-start turn on as a stand alone regulator. Slave operation is performed by putting
V – OSNS (Pin M12):
(–) Input to the Remote Sense Ampli- a resistor divider from the master output to ground, and fier. This pin connects to the ground remote sense point. connecting the center point of the divider to this pin. See The remote sense amplifier is used for VOUT ≤ 3.3V. Tie the Applications Information section. to INTVCC if not used.
MPGM (Pins A12, B11):
Programmable Margining Input.
NC1 (Pin M12):
No Internal Connection on the LTM4601A-1. A resistor from this pin to ground sets a current that is
V + OSNS (Pin J12):
(+) Input to the Remote Sense Ampli- equal to 1.18V/R. This current multiplied by 10kΩ will fier. This pin connects to the output remote sense point. equal a value in millivolts that is a percentage of the 0.6V The remote sense amplifier is used for VOUT ≤ 3.3V. Tie reference voltage. See the Applications Information sec- to GND if not used. tion. To parallel LTM4601As, each requires an individual MPGM resistor. Do not tie MPGM pins together. Both pins
NC2 (Pin J12):
No Internal Connection on the LTM4601A-1. are internally connected. Pin A12 is a test pin.
DIFFVOUT (Pin K12):
Output of the Remote Sense Amplifier.
f
This pin connects to the V
SET (Pins B12, C11):
Frequency Set Internally to 850kHz. OUT_LCL pin. Leave floating if An external resistor can be placed from this pin to ground not used. to increase frequency. See the Applications Information
NC3 (Pin K12):
No Internal Connection on the LTM4601A-1. section for frequency adjustment. Both pins are internally
DRV
connected. Pin B12 is a test pin.
CC (Pin E12):
This pin normally connects to INTVCC for powering the internal MOSFET drivers. This pin can
VFB (Pin F12):
The Negative Input of the Error Amplifier. be biased up to 6V from an external supply with about Internally, this pin is connected to VOUT_LCL pin with a 50mA capability, or an external circuit shown in Figure 16. 60.4k precision resistor. Different output voltages can This improves efficiency at the higher input voltages by be programmed with an additional resistor between VFB reducing power dissipation in the module. and SGND pins. See the Applications Information section.
INTVCC (Pin A7, D9):
This pin is for additional decoupling
MARG0 (Pin C12):
This pin is the LSB logic input for the of the 5V internal regulator. These pins are internally margining function. Together with the MARG1 pin it will connected. Pin A7 is a test pin. determine if margin high, margin low or no margin state is applied. The pin has an internal pull-down resistor of 50k. See the Applications Information section. 4601afe For more information www.linear.com/LTM4601A 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photos Related Parts
PIN FUNCTIONS (See Package Description for Pin Assignment) VIN (Bank 1):
Power Input Pins. Apply input voltage be-
PLLIN (Pin A8):
External Clock Synchronization Input to tween these pins and PGND pins. Recommend placing the Phase Detector. This pin is internally terminated to input decoupling capacitance directly between VIN pins SGND with a 50k resistor. Apply a clock with high level and PGND pins. above 2V and below INTVCC. See the Applications Infor-
V
mation section.
OUT (Bank 3):
Power Output Pins. Apply output load between these pins and PGND pins. Recommend placing
TRACK/SS (Pin A9):
Output Voltage Tracking and Soft- output decoupling capacitance directly between these pins Start Pin. When the module is configured as a master and PGND pins. See Figure 15. output, then a soft-start capacitor is placed on this pin
PGND (Bank 2):
Power ground pins for both input and to ground to control the master ramp rate. A soft-start output returns. capacitor can be used for soft-start turn on as a stand alone regulator. Slave operation is performed by putting
V – OSNS (Pin M12):
(–) Input to the Remote Sense Ampli- a resistor divider from the master output to ground, and fier. This pin connects to the ground remote sense point. connecting the center point of the divider to this pin. See The remote sense amplifier is used for VOUT ≤ 3.3V. Tie the Applications Information section. to INTVCC if not used.
MPGM (Pins A12, B11):
Programmable Margining Input.
NC1 (Pin M12):
No Internal Connection on the LTM4601A-1. A resistor from this pin to ground sets a current that is
V + OSNS (Pin J12):
(+) Input to the Remote Sense Ampli- equal to 1.18V/R. This current multiplied by 10kΩ will fier. This pin connects to the output remote sense point. equal a value in millivolts that is a percentage of the 0.6V The remote sense amplifier is used for VOUT ≤ 3.3V. Tie reference voltage. See the Applications Information sec- to GND if not used. tion. To parallel LTM4601As, each requires an individual MPGM resistor. Do not tie MPGM pins together. Both pins
NC2 (Pin J12):
No Internal Connection on the LTM4601A-1. are internally connected. Pin A12 is a test pin.
DIFFVOUT (Pin K12):
Output of the Remote Sense Amplifier.
f
This pin connects to the V
SET (Pins B12, C11):
Frequency Set Internally to 850kHz. OUT_LCL pin. Leave floating if An external resistor can be placed from this pin to ground not used. to increase frequency. See the Applications Information
NC3 (Pin K12):
No Internal Connection on the LTM4601A-1. section for frequency adjustment. Both pins are internally
DRV
connected. Pin B12 is a test pin.
CC (Pin E12):
This pin normally connects to INTVCC for powering the internal MOSFET drivers. This pin can
VFB (Pin F12):
The Negative Input of the Error Amplifier. be biased up to 6V from an external supply with about Internally, this pin is connected to VOUT_LCL pin with a 50mA capability, or an external circuit shown in Figure 16. 60.4k precision resistor. Different output voltages can This improves efficiency at the higher input voltages by be programmed with an additional resistor between VFB reducing power dissipation in the module. and SGND pins. See the Applications Information section.
INTVCC (Pin A7, D9):
This pin is for additional decoupling
MARG0 (Pin C12):
This pin is the LSB logic input for the of the 5V internal regulator. These pins are internally margining function. Together with the MARG1 pin it will connected. Pin A7 is a test pin. determine if margin high, margin low or no margin state is applied. The pin has an internal pull-down resistor of 50k. See the Applications Information section. 4601afe For more information www.linear.com/LTM4601A 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photos Related Parts
