Datasheet AP62600 (Diodes) - 3
| Fabricante | Diodes |
| Descripción | 4.5V To 18V Input, 6A Synchronous Buck Converter |
| Páginas / Página | 26 / 3 — AP62600. Pin Descriptions. Pin Name. Pin Number. Function. Input … |
| Formato / tamaño de archivo | PDF / 1.9 Mb |
| Idioma del documento | Inglés |
AP62600. Pin Descriptions. Pin Name. Pin Number. Function. Input Capacitor. Enable. Soft-Start, Tracking, and Sequencing
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AP62600 Pin Descriptions Pin Name Pin Number Function
Power Ground. PGND must be connected to a single point ground and to as large a PGND plane as possible on the PGND 1 PCB for proper operation and optimized thermal performance. Power Input. VIN supplies the power to the IC as well as the step-down converter power MOSFETs. Drive VIN with a VIN 2 4.5V to 18V power source. Bypass VIN to GND with a suitably large capacitor to eliminate noise due to the switching of the IC. See
Input Capacitor
section for more details. Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator and low to EN 3 turn it off. It can be left open for automatic startup. The EN has a precision threshold of 1.18V for programing the UVLO. See
Enable
section for more details. MODE Select. MODE is used to select the operation mode of the device. Connect MODE to GND to program the MODE 4 device to operate in PFM Mode. Leave MODE floating to program the device to operate in USM. Connect MODE to VCC to program the device to operate in PWM Only Mode. Frequency Select. FSEL is used to select the switching frequency of the device. Connect FSEL to GND to program FSEL 5 the switching frequency to 400kHz. Leave FSEL floating to program the switching frequency to 800kHz. Connect FSEL to VCC to program the switching frequency to 1.2MHz. Power-Good. PG is an open-drain output that is pulled to GND when the output voltage is out of its regulation limits PG 6 or during soft-start. Connect an external pull-up resistor from PG to VCC. High-Side Gate Drive Boost Input. BST supplies the drive voltage for the high-side N-Channel power MOSFET. A BST 7 100nF capacitor is recommended from BST to SW to power the high-side driver. Power Switching Output. SW is the switching node that supplies power to the output. Connect the output LC filter SW 8 from SW to the output load. Internal Power Supply. VCC supplies the internal logic circuitry as well as the gate drivers. Connect a 1μF capacitor VCC 9 as close as possible to VCC and PGND. This pin is not active when EN is low. Soft-start and Tracking. SS/TR controls the soft-start, tracking, and sequencing of the output. Connect a ceramic SS/TR 10 capacitor from SS/TR to GND to program the soft-start time. Leave SS/TR floating to use the internal soft-start. See
Soft-Start, Tracking, and Sequencing
section for more details. GND 11 Ground. GND is the main power ground for the control logic circuitry. It must have a Kelvin Connection to PGND. Feedback. FB is the sensing terminal for the output voltage. Connect this pin to the resistive divider of the output. FB 12 See
Setting the Output Voltage
section for more details. AP62600 3 of 26 January 2020 Document number: DS42003 Rev. 2 - 2
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Power Ground. PGND must be connected to a single point ground and to as large a PGND plane as possible on the PGND 1 PCB for proper operation and optimized thermal performance. Power Input. VIN supplies the power to the IC as well as the step-down converter power MOSFETs. Drive VIN with a VIN 2 4.5V to 18V power source. Bypass VIN to GND with a suitably large capacitor to eliminate noise due to the switching of the IC. See
Input Capacitor
section for more details. Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the regulator and low to EN 3 turn it off. It can be left open for automatic startup. The EN has a precision threshold of 1.18V for programing the UVLO. See
Enable
section for more details. MODE Select. MODE is used to select the operation mode of the device. Connect MODE to GND to program the MODE 4 device to operate in PFM Mode. Leave MODE floating to program the device to operate in USM. Connect MODE to VCC to program the device to operate in PWM Only Mode. Frequency Select. FSEL is used to select the switching frequency of the device. Connect FSEL to GND to program FSEL 5 the switching frequency to 400kHz. Leave FSEL floating to program the switching frequency to 800kHz. Connect FSEL to VCC to program the switching frequency to 1.2MHz. Power-Good. PG is an open-drain output that is pulled to GND when the output voltage is out of its regulation limits PG 6 or during soft-start. Connect an external pull-up resistor from PG to VCC. High-Side Gate Drive Boost Input. BST supplies the drive voltage for the high-side N-Channel power MOSFET. A BST 7 100nF capacitor is recommended from BST to SW to power the high-side driver. Power Switching Output. SW is the switching node that supplies power to the output. Connect the output LC filter SW 8 from SW to the output load. Internal Power Supply. VCC supplies the internal logic circuitry as well as the gate drivers. Connect a 1μF capacitor VCC 9 as close as possible to VCC and PGND. This pin is not active when EN is low. Soft-start and Tracking. SS/TR controls the soft-start, tracking, and sequencing of the output. Connect a ceramic SS/TR 10 capacitor from SS/TR to GND to program the soft-start time. Leave SS/TR floating to use the internal soft-start. See
Soft-Start, Tracking, and Sequencing
section for more details. GND 11 Ground. GND is the main power ground for the control logic circuitry. It must have a Kelvin Connection to PGND. Feedback. FB is the sensing terminal for the output voltage. Connect this pin to the resistive divider of the output. FB 12 See
Setting the Output Voltage
section for more details. AP62600 3 of 26 January 2020 Document number: DS42003 Rev. 2 - 2
www.diodes.com
© Diodes Incorporated