Datasheet LTM4602 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | 6A High Efficiency DC/DC µModule |
| Pages / Page | 24 / 6 — PIN FUNCTIONS (See Package Description for Pin Assignment). VIN (Bank … |
| File Format / Size | PDF / 340 Kb |
| Document Language | English |
PIN FUNCTIONS (See Package Description for Pin Assignment). VIN (Bank 1):. SGND (Pin D23):. RUN/SS (Pin F23):. fADJ (Pin A15):
Model Line for this Datasheet
Text Version of Document
LTM4602
PIN FUNCTIONS (See Package Description for Pin Assignment) VIN (Bank 1):
Power Input Pins. Apply input voltage be-
SGND (Pin D23):
Signal Ground Pin. All small-signal tween these pins and PGND pins. Recommend placing components should connect to this ground, which in turn input decoupling capacitance directly between VIN pins connects to PGND at one point. and PGND pins.
RUN/SS (Pin F23):
Run and Soft-Start Control. Forcing
fADJ (Pin A15):
A 110k resistor from VIN to this pin sets this pin below 0.8V will shut down the power supply. the one-shot timer current, thereby setting the switching Inside the power module, there is a 1000pF capacitor frequency. The LTM4602 switching frequency is typically which provides approximately 0.7ms soft-start time with 850kHz. An external resistor to ground can be selected to 200μF output capacitance. Additional soft-start time can reduce the one-shot timer current, thus lower the switching be achieved by adding additional capacitance between the frequency to accommodate a higher duty cycle step down RUN/SS and SGND pins. The internal short-circuit latchoff requirement. See the applications section. can be disabled by adding a resistor between this pin and the V
SV
IN pin. This pullup resistor must supply a minimum
IN (Pin A17):
Supply Pin for Internal PWM Controller. Leave 5μA pull up current. this pin open or add additional decoupling capacitance.
FCB (Pin G23):
Forced Continuous Input. Grounding this
EXTVCC (Pin A19):
External 5V supply pin for controller. If pin enables forced continuous mode operation regardless left open or grounded, the internal 5V linear regulator will of load conditions. Tying this pin above 0.63V enables power the controller and MOSFET drivers. For high input discontinuous conduction mode to achieve high effi ciency voltage applications, connecting this pin to an external operation at light loads. There is an internal 4.75k resistor 5V will reduce the power loss in the power module. The between the FCB and SGND pins. EXTVCC voltage should never be higher than VIN.
PGOOD (Pin J23):
Output Voltage Power Good Indicator.
VOSET (Pin A21):
The Negative Input of The Error Amplifi er. When the output voltage is within 10% of the nominal Internally, this pin is connected to VOUT with a 100k precision voltage, the PGOOD is open drain output. Otherwise, this resistor. Different output voltages can be programmed with pin is pulled to ground. additional resistors between the VOSET and SGND pins.
PGND (Bank 2):
Power ground pins for both input and
COMP (Pin B23):
Current Control Threshold and Error output returns. Amplifi er Compensation Point. The current comparator threshold increases with this control voltage. The voltage
VOUT (Bank 3):
Power Output Pins. Apply output load ranges from 0V to 2.4V with 0.8V corresponding to zero between these pins and PGND pins. Recommend placing sense voltage (zero current). High Frequency output decoupling capacitance directly between these pins and PGND pins. TOP VIEW CC IN OSET f ADJ SV EXTV V 2 3 4 5 6 7 16 17 18 19 A 1 20 B COMP 9 10 11 C VIN 8 21 BANK 1 D SGND 13 14 15 E 12 22 F RUN/SS 25 23 26 27 28 29 30 31 G FCB H 32 24 33 34 35 36 37 38 J PGOOD K PGND 39 40 41 42 43 44 45 46 47 48 49 L BANK 2 50 51 52 53 54 55 56 57 58 59 60 M 61 62 63 64 65 66 67 68 69 70 71 N 72 73 74 75 76 77 78 79 80 81 82 P VOUT 83 84 85 86 87 88 89 90 91 92 93 R BANK 3 94 95 96 97 98 99 100 101 102 103 104 T 1 3 5 7 9 11 13 15 17 19 21 23 2 4 6 8 10 12 14 16 18 20 22 4602 PN01 4602fa 6
PIN FUNCTIONS (See Package Description for Pin Assignment) VIN (Bank 1):
Power Input Pins. Apply input voltage be-
SGND (Pin D23):
Signal Ground Pin. All small-signal tween these pins and PGND pins. Recommend placing components should connect to this ground, which in turn input decoupling capacitance directly between VIN pins connects to PGND at one point. and PGND pins.
RUN/SS (Pin F23):
Run and Soft-Start Control. Forcing
fADJ (Pin A15):
A 110k resistor from VIN to this pin sets this pin below 0.8V will shut down the power supply. the one-shot timer current, thereby setting the switching Inside the power module, there is a 1000pF capacitor frequency. The LTM4602 switching frequency is typically which provides approximately 0.7ms soft-start time with 850kHz. An external resistor to ground can be selected to 200μF output capacitance. Additional soft-start time can reduce the one-shot timer current, thus lower the switching be achieved by adding additional capacitance between the frequency to accommodate a higher duty cycle step down RUN/SS and SGND pins. The internal short-circuit latchoff requirement. See the applications section. can be disabled by adding a resistor between this pin and the V
SV
IN pin. This pullup resistor must supply a minimum
IN (Pin A17):
Supply Pin for Internal PWM Controller. Leave 5μA pull up current. this pin open or add additional decoupling capacitance.
FCB (Pin G23):
Forced Continuous Input. Grounding this
EXTVCC (Pin A19):
External 5V supply pin for controller. If pin enables forced continuous mode operation regardless left open or grounded, the internal 5V linear regulator will of load conditions. Tying this pin above 0.63V enables power the controller and MOSFET drivers. For high input discontinuous conduction mode to achieve high effi ciency voltage applications, connecting this pin to an external operation at light loads. There is an internal 4.75k resistor 5V will reduce the power loss in the power module. The between the FCB and SGND pins. EXTVCC voltage should never be higher than VIN.
PGOOD (Pin J23):
Output Voltage Power Good Indicator.
VOSET (Pin A21):
The Negative Input of The Error Amplifi er. When the output voltage is within 10% of the nominal Internally, this pin is connected to VOUT with a 100k precision voltage, the PGOOD is open drain output. Otherwise, this resistor. Different output voltages can be programmed with pin is pulled to ground. additional resistors between the VOSET and SGND pins.
PGND (Bank 2):
Power ground pins for both input and
COMP (Pin B23):
Current Control Threshold and Error output returns. Amplifi er Compensation Point. The current comparator threshold increases with this control voltage. The voltage
VOUT (Bank 3):
Power Output Pins. Apply output load ranges from 0V to 2.4V with 0.8V corresponding to zero between these pins and PGND pins. Recommend placing sense voltage (zero current). High Frequency output decoupling capacitance directly between these pins and PGND pins. TOP VIEW CC IN OSET f ADJ SV EXTV V 2 3 4 5 6 7 16 17 18 19 A 1 20 B COMP 9 10 11 C VIN 8 21 BANK 1 D SGND 13 14 15 E 12 22 F RUN/SS 25 23 26 27 28 29 30 31 G FCB H 32 24 33 34 35 36 37 38 J PGOOD K PGND 39 40 41 42 43 44 45 46 47 48 49 L BANK 2 50 51 52 53 54 55 56 57 58 59 60 M 61 62 63 64 65 66 67 68 69 70 71 N 72 73 74 75 76 77 78 79 80 81 82 P VOUT 83 84 85 86 87 88 89 90 91 92 93 R BANK 3 94 95 96 97 98 99 100 101 102 103 104 T 1 3 5 7 9 11 13 15 17 19 21 23 2 4 6 8 10 12 14 16 18 20 22 4602 PN01 4602fa 6
