Datasheet LTC3417A-1 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | Dual Synchronous 1.5A/1A 4MHz Step-Down DC/DC Regulator with POR |
| Pages / Page | 20 / 7 — PIN FUNCTIONS. PHASE (Pin 14/Pin 17):. PGND1 (Pin 16/Pin 19):. PGND2, … |
| File Format / Size | PDF / 353 Kb |
| Document Language | English |
PIN FUNCTIONS. PHASE (Pin 14/Pin 17):. PGND1 (Pin 16/Pin 19):. PGND2, GNDD (Pins 1,10,11,20):. Exposed Pad (Pin 17/Pin 21):
Model Line for this Datasheet
Text Version of Document
LTC3417A-1
PIN FUNCTIONS PHASE (Pin 14/Pin 17):
Selects 1A regulator switching
PGND1 (Pin 16/Pin 19):
Ground for SW1 N-Channel Driver. phase with respect to 1.5A regulator switching. Set to
PGND2, GNDD (Pins 1,10,11,20):
TSSOP Package Only. VIN, the 1.5A regulator and the 1A regulator are in phase. Ground for SW2 N-channel driver and digital ground for When PHASE is at 0V, the 1.5A regulator and the 1A circuit. regulator are switching 180 degrees out-of-phase. Do not fl oat this pin.
Exposed Pad (Pin 17/Pin 21):
PGND2, GNDD. Ground for SW2 N-channel driver and digital ground for circuit. The
SW1 (Pin 15/Pin 18):
Switch Node Connection to the Exposed Pad must be soldered to PCB ground. Inductor for the 1.5A Regulator. This pin swings from VIN1 to PGND1.
FUNCTIONAL DIAGRAM 1.5A REGULATOR
ITH1 I VIN1 + TH LIMIT – + VFB1 – + – VB SLOPE COMPENSATION 0.752V + ANTI-SHOOT- SW1 – THROUGH + + LOGIC – 0.848V – – PGND1 + RUN1 POR VOLTAGE V REFERENCE IN2 DELAY RUN2 PHASE SYNC/MODE OSCILLATOR FREQ + PGND2 – – 0.848V – LOGIC + + – SW2 ANTI-SHOOT- THROUGH + 0.752V SLOPE COMPENSATION – + VFB2 – VB + – + ITH
1A REGULATOR
I LIMIT TH2 VIN2 3417A-1 BD 3417a1fa 7
PIN FUNCTIONS PHASE (Pin 14/Pin 17):
Selects 1A regulator switching
PGND1 (Pin 16/Pin 19):
Ground for SW1 N-Channel Driver. phase with respect to 1.5A regulator switching. Set to
PGND2, GNDD (Pins 1,10,11,20):
TSSOP Package Only. VIN, the 1.5A regulator and the 1A regulator are in phase. Ground for SW2 N-channel driver and digital ground for When PHASE is at 0V, the 1.5A regulator and the 1A circuit. regulator are switching 180 degrees out-of-phase. Do not fl oat this pin.
Exposed Pad (Pin 17/Pin 21):
PGND2, GNDD. Ground for SW2 N-channel driver and digital ground for circuit. The
SW1 (Pin 15/Pin 18):
Switch Node Connection to the Exposed Pad must be soldered to PCB ground. Inductor for the 1.5A Regulator. This pin swings from VIN1 to PGND1.
FUNCTIONAL DIAGRAM 1.5A REGULATOR
ITH1 I VIN1 + TH LIMIT – + VFB1 – + – VB SLOPE COMPENSATION 0.752V + ANTI-SHOOT- SW1 – THROUGH + + LOGIC – 0.848V – – PGND1 + RUN1 POR VOLTAGE V REFERENCE IN2 DELAY RUN2 PHASE SYNC/MODE OSCILLATOR FREQ + PGND2 – – 0.848V – LOGIC + + – SW2 ANTI-SHOOT- THROUGH + 0.752V SLOPE COMPENSATION – + VFB2 – VB + – + ITH
1A REGULATOR
I LIMIT TH2 VIN2 3417A-1 BD 3417a1fa 7
