Datasheet LTM8026 (Analog Devices) - 10
| Hersteller | Analog Devices |
| Beschreibung | 36VIN, 5A CVCC Step-Down µModule Regulator |
| Seiten / Seite | 28 / 10 — TYPICAL PERFORMANCE CHARACTERISTICS. TA = 25°C, unless otherwise noted. … |
| Dateiformat / Größe | PDF / 432 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. TA = 25°C, unless otherwise noted. Configured per Table 1, where applicable
Modelllinie für dieses Datenblatt
Textversion des Dokuments
LTM8026
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Configured per Table 1, where applicable. CTL_I Voltage vs Load Current, CTL_T Voltage vs Load Current, CTL_T = 2V CTL_I = 2V
2.5 2.5 2.0 2.0 1.5 1.5 1.0 1.0 CTL_I VOLTAGE (V) CTL_T VOLTAGE (V) 0.5 0.5 0 0 0 1 2 3 4 5 6 0 1 2 3 4 5 6 LOAD CURRENT (A) LOAD CURRENT (A) 8026 G54 8026 G55
PIN FUNCTIONS VOUT (Bank 1):
Power Output Pins. Apply the output filter
CTL_I (Pin E8):
The CTL_I pin reduces the maximum capacitor and the output load between these pins and regulated output current of the LTM8026. The maximum GND pins. control voltage is 1.5V. If this function is not used, tie
GND (Bank 2):
Tie these GND pins to a local ground plane this pin to VREF . below the LTM8026 and the circuit components. In most
VREF (Pin F8):
Buffered 2V Reference Capable of 0.5mA applications, the bulk of the heat flow out of the LTM8026 Drive. is through these pads, so the printed circuit design has a
RT (Pin G8):
The RT pin is used to program the switching large impact on the thermal performance of the part. See frequency of the LTM8026 by connecting a resistor from the PCB Layout and Thermal Considerations sections for this pin to ground. The Applications Information section more details. Return the feedback divider (RADJ) to this net. of the data sheet includes a table to determine the resis-
VIN (Bank 3):
The VIN pins supply current to the LTM8026’s tance value based on the desired switching frequency. internal regulator and to the internal power switches. These When using the SYNC function, apply a resistor value pins must be locally bypassed with an external, low ESR equivalent to 20% lower than the SYNC pulse frequency. capacitor; see Table 1 for recommended values. Do not leave this pin open.
CTL_T (Pin D8):
Connect a resistor/NTC thermistor network
COMP (Pin H8):
Compensation Pin. This pin is generally to the CTL_T pin to reduce the maximum regulated output not used. The LTM8026 is internally compensated, but current of the LTM8026 in response to temperature. The some rare situations may arise that require a modification maximum control voltage is 1.5V. If this function is not to the control loop. This pin connects directly to the PWM used, tie this pin to VREF . comparator of the LTM8026. In most cases, no adjustment is necessary. If this function is not used, leave this pin open. 8026fd 10 For more information www.linear.com/LTM8026 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Package Photo Package Description Revision History Typical Application Design Resources Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Configured per Table 1, where applicable. CTL_I Voltage vs Load Current, CTL_T Voltage vs Load Current, CTL_T = 2V CTL_I = 2V
2.5 2.5 2.0 2.0 1.5 1.5 1.0 1.0 CTL_I VOLTAGE (V) CTL_T VOLTAGE (V) 0.5 0.5 0 0 0 1 2 3 4 5 6 0 1 2 3 4 5 6 LOAD CURRENT (A) LOAD CURRENT (A) 8026 G54 8026 G55
PIN FUNCTIONS VOUT (Bank 1):
Power Output Pins. Apply the output filter
CTL_I (Pin E8):
The CTL_I pin reduces the maximum capacitor and the output load between these pins and regulated output current of the LTM8026. The maximum GND pins. control voltage is 1.5V. If this function is not used, tie
GND (Bank 2):
Tie these GND pins to a local ground plane this pin to VREF . below the LTM8026 and the circuit components. In most
VREF (Pin F8):
Buffered 2V Reference Capable of 0.5mA applications, the bulk of the heat flow out of the LTM8026 Drive. is through these pads, so the printed circuit design has a
RT (Pin G8):
The RT pin is used to program the switching large impact on the thermal performance of the part. See frequency of the LTM8026 by connecting a resistor from the PCB Layout and Thermal Considerations sections for this pin to ground. The Applications Information section more details. Return the feedback divider (RADJ) to this net. of the data sheet includes a table to determine the resis-
VIN (Bank 3):
The VIN pins supply current to the LTM8026’s tance value based on the desired switching frequency. internal regulator and to the internal power switches. These When using the SYNC function, apply a resistor value pins must be locally bypassed with an external, low ESR equivalent to 20% lower than the SYNC pulse frequency. capacitor; see Table 1 for recommended values. Do not leave this pin open.
CTL_T (Pin D8):
Connect a resistor/NTC thermistor network
COMP (Pin H8):
Compensation Pin. This pin is generally to the CTL_T pin to reduce the maximum regulated output not used. The LTM8026 is internally compensated, but current of the LTM8026 in response to temperature. The some rare situations may arise that require a modification maximum control voltage is 1.5V. If this function is not to the control loop. This pin connects directly to the PWM used, tie this pin to VREF . comparator of the LTM8026. In most cases, no adjustment is necessary. If this function is not used, leave this pin open. 8026fd 10 For more information www.linear.com/LTM8026 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Package Photo Package Description Revision History Typical Application Design Resources Related Parts