DIO59618A

Version 1.0, Oct 2025

www.dioo.com

© 2025 Dioo Microcircuits Co., Ltd. Jiangsu

12

Table 2. BUCK_CFG1 register

Register

Address Bit R/W/C Default Symbol

Description

BUCK_CFG1

0x04

Bit7

R/W

1

TICC_EN

0: Disable

1: Enable

Bit6

R/W

1

TITC_EN

0: Disable

1: Enable

Bit5

R/W

0

CHG_EN

0: Disable

1: Enable

Bit4

R/W

1

VTC[0]

000: 2.3 V

010: 2.5 V

100: 2.7 V

110: 2.9 V

001: 2.4 V

011: 2.6 V

101: 2.8 V

111: 3.0 V

Bit3

R/W

1

VTC[1]

Bit2

R/W

1

VTC[2]

Bit1

R/W

0

ITC

0: 10 mA

1: 30 mA

Bit0

R/W

0

NC

NC

NC

Table 3. BUCK_CFG2 register

Register

Address Bit R/W/C

Defaul

t

Symbol

Description

BUCK_CFG2

0x05

Bit7

R/W

0

ITERM[2]

000: 0.1 ICC

010: 40 mA

100: 80 mA

110: 120 mA

001: 20 mA

011: 60 mA

101: 100 mA

111: 140 mA

Bit6

R/W

0

ITERM[1]

Bit5

R/W

0

ITERM[0]

Bit4

R/W

0

NC

NC

NC

Bit3

R/W

0

NC

NC

NC

Bit2

R/W

0

NC

NC

NC

Bit1

R/W

0

NC

NC

NC

Bit0

R/W

0

NC

NC

NC

9.2. Discharge mode

9.2.1. Boost output

The DIO59618A provides a synchronous boost output, integrated power MOSFET, and 5 V/1 A output

(output voltage register can be adjusted), with the efficiency up to 93%. The DIO59618A uses a 1 MHz

switching frequency, which can effectively reduce the size of external components. In standby mode, the

automatic load recognition module of VOL and VOR ports is on, and the static current of the chip is 6 μA.

When the VOL and VOR detect the load, VOR_IN and VOL_IN signals are generated inside the chip, and

the interrupt signal is sent to notify the MCU. The MCU then opens the VOL/R channel to realize the

discharge function.

The chip integrates the output voltage configurable, output soft start, overcurrent, overvoltage, short circuit,

overtemperature, battery undervoltage, and other functions.