MAX15301AA01-CK 查看數據表（PDF） - Maxim Integrated

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MAX15301AA01-CK

InTune Automatically Compensated Digital PoL Controller with Driver and PMBus Telemetry

Maxim Integrated 

MAX15301

InTune Automatically Compensated Digital PoL

Controller with Driver and PMBus Telemetry

Pin Description (continued)

PIN

NAME

FUNCTION

9

SALRT

SMBus Alert. Interrupt to the SMBus master. Open-drain output that pulls low when SMBus interaction is

required.

10

SCL

SMBus Clock Input

11

SDA

SMBus Data Input/Output

12

EN

Enable Input. Do not leave unconnected. By default, driving EN high enables output regulation, and

driving EN low disables output regulation.

13

INSNS

Powertrain Input Rail Sense. Monitors the input supply of the DC-DC converter. Connect a series 2kΩ

resistor between input rail and INSNS pin.

14

LXSNS

Switching Node Sense Input. Connect a series 2kΩ resistor between switching node and LXSNS pin.

15

DH

High-Side MOSFET Gate Drive

16

LX

Switching Node. Connect directly to the high-side of the output inductor.

17

BST

Bootstrap Capacitor Connection. Connect a 0.22µF ceramic capacitor between BST and the switching

node.

18

GDRV

Gate-Driver Supply. Bypass GDRV to PGND with a 2.2µF ceramic capacitor.

19

DL

Low-Side MOSFET Gate Drive

20

PGND

Power Ground. Connect to SGND and DGND using short wide PCB traces.

21

LBI

BabyBuck Switching Node 1. See the BabyBuck Regulator section for configurations.

22

PWR

Power-Supply Input. Connect to a power-supply input. Bypass to ground with a 1µF ceramic capacitor.

23

LBO

BabyBuck Switching Node 2. See the BabyBuck Regulator section for configurations.

Internal 3.3V Regulator Output. 3P3 is the supply rail for the internal analog circuitry. Bypass 3P3 to

24, 25

3P3

SGND with a 4.7µF ceramic capacitor. This pin may not be used to power any circuitry external to the

MAX15301.

26

27

28, 29

30

31

OUTN

OUTP

I.C.

DCRP

DCRN

Output Voltage Differential Sense Negative Input. Connect to ground at the load.

Output Voltage Differential Sense Positive Input. Connect to the output at the load.

Internally Connected. Connect directly to ground near the MAX15301.

Output Current Differential Sense Positive Input. Connect to the inductor or current-sense element

positive side through an appropriate filter network.

Output Current Differential Sense Negative Input. Connect to the inductor or current-sense element

negative side.

32

PG

Open-Drain Power-Good Indicator. PG asserts high when soft-start is complete, the voltage has reached

regulation, after a successful InTune calibration is completed.

Exposed Pad and Analog Ground. The EP serves two purposes: it is both the analog ground of

EP

SGND

the device and a conduit for heat transfer. Connect to a large ground plane to maximize thermal

performance. See the PCB Layout Guidelines section.

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