Datasheet LTC7802-3.3 (Analog Devices) - 10
| Hersteller | Analog Devices |
| Beschreibung | 40V Low IQ, 3MHz Dual, 2-Phase Synchronous Step-Down Controller with Spread Spectrum |
| Seiten / Seite | 34 / 10 — PIN FUNCTIONS. TRACK/SS1, TRACK/SS2 (Pins 26,11):. VOUT1, VFB2 (Pins … |
| Dateiformat / Größe | PDF / 1.5 Mb |
| Dokumentensprache | Englisch |
PIN FUNCTIONS. TRACK/SS1, TRACK/SS2 (Pins 26,11):. VOUT1, VFB2 (Pins 28,9):. GND (Exposed Pad Pin 29):
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LTC7802-3.3
PIN FUNCTIONS
within ±10% of its regulation point, the corresponding with this control voltage. Place compensation compo- PGOOD pin is pulled low. nents between the ITH pins and ground.
TRACK/SS1, TRACK/SS2 (Pins 26,11):
External Tracking
VOUT1, VFB2 (Pins 28,9):
Controller Feedback Inputs. and Soft-Start Input. The LTC7802-3.3 regulates the nega- Connect VOUT1 directly to the channel 1 output voltage. tive input of the Error Amplifier (EA–) voltage to the lesser Connect an external resistor divider between the channel 2 of 0.8V or the voltage on the TRACK/SS1,2 pin. Internal output voltage and the VFB2 pin to set the regulated VOUT2 12.5µA pull-up current sources are connected to these voltage. Tie VFB2 to INTVCC to configure the channels for a pins. A capacitor to ground sets the start-up ramp time to 2-phase 3.3V output, in which both channels share VOUT1, the final regulated output voltage. The ramp time is equal ITH1, and TRACK/SS1. to 0.65ms for every 10nF of capacitance. Alternatively,
GND (Exposed Pad Pin 29):
Ground. Connects to the a resistor divider on another voltage supply connected sources of the bottom N-Channel MOSFETs and the (–) to the TRACK/SS pins allows the LTC7802-3.3 output to terminal(s) of decoupling capacitors. The exposed pad track the other supply during start-up. must be soldered to PCB ground for rated electrical and
ITH1, ITH2 (Pins 27,10):
Error Amplifier Outputs and thermal performance. Switching Regulator Compensation Points. Each associ- ated channel’s current comparator trip point increases Rev. 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
PIN FUNCTIONS
within ±10% of its regulation point, the corresponding with this control voltage. Place compensation compo- PGOOD pin is pulled low. nents between the ITH pins and ground.
TRACK/SS1, TRACK/SS2 (Pins 26,11):
External Tracking
VOUT1, VFB2 (Pins 28,9):
Controller Feedback Inputs. and Soft-Start Input. The LTC7802-3.3 regulates the nega- Connect VOUT1 directly to the channel 1 output voltage. tive input of the Error Amplifier (EA–) voltage to the lesser Connect an external resistor divider between the channel 2 of 0.8V or the voltage on the TRACK/SS1,2 pin. Internal output voltage and the VFB2 pin to set the regulated VOUT2 12.5µA pull-up current sources are connected to these voltage. Tie VFB2 to INTVCC to configure the channels for a pins. A capacitor to ground sets the start-up ramp time to 2-phase 3.3V output, in which both channels share VOUT1, the final regulated output voltage. The ramp time is equal ITH1, and TRACK/SS1. to 0.65ms for every 10nF of capacitance. Alternatively,
GND (Exposed Pad Pin 29):
Ground. Connects to the a resistor divider on another voltage supply connected sources of the bottom N-Channel MOSFETs and the (–) to the TRACK/SS pins allows the LTC7802-3.3 output to terminal(s) of decoupling capacitors. The exposed pad track the other supply during start-up. must be soldered to PCB ground for rated electrical and
ITH1, ITH2 (Pins 27,10):
Error Amplifier Outputs and thermal performance. Switching Regulator Compensation Points. Each associ- ated channel’s current comparator trip point increases Rev. 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts