ACT8870QJ-T
Rev 3.0, 02-Oct-2017
Advanced PMU for Microcontrollers and Solid State Drive Applications
BENEFITS and FEATURES
GENERAL DESCRIPTION
The ACT8870 PMIC is an integrated ActivePMU power
management unit. It is designed to power a wide range
of processors, including Atmel’s SAMA5D2, FPGA’s,
peripherals, microcontrollers, and solid-state drive ap-
plications. It is highly flexible and can be reconfigured
via I
2
C for multiple applications without the need for
PCB changes. The low external component count and
high configurability significantly speeds time to market.
Examples of configurable options include output voltage,
startup time, slew rate, system level sequencing,
switching frequency, sleep modes, operating modes etc.
ACT8870 is programmed at the factory with default con-
figuration. These settings can be optimized for a specific
design through the I
2
C interface. The ACT8870 comes
in several default configuration. Contact the factory for
specific default configurations.
The core of the device includes four DC/DC step down
converters using integrated power FETs, three low-
dropout regulators (LDOs), and an optional load switch.
Each DC/DC regulator switches at 2.25MHz, requiring
only three small components for operation. The LDOs
only require small ceramic capacitors. All are highly
configurable via the I
2
C interface.
The ACT8870 PMIC is available in a 5 x 5 mm 40 pin
QFN package or a 3.2x4.2 mm 0.5mm 48 ball wafer
chip-scale package.
Wide input voltage range
o
Vin = 2.8V to 5.5V
Complete integrated power solution
o
One 4A DC/DC Step-Down (Buck)
Regulator
o
Three 2.5A DC/DC Step-Down
(Buck) Regulators
o
One 800mA LDO
o
Two 200mA LDOs
Space Savings
o
Fully integrated
o
High Fsw =2.25MHz or 1.125MHz
o
Integrated sequencing
Easy system level design
o
Configurable sequencing
o
Seamless sequencing with external
supplies
Buck 1 Bypass Mode for 3.3V system level
compliance
Highly configurable
o
uP interface for status reporting
and controllability
o
Programmable Reset and Power
Good GPIO’s
o
Flexible Sequencing Options
I
2
C Interface – 1MHz
APPLICATIONS
•
•
•
•
Microcontroller Applications
Solid-State Drives
FPGA
Video Processor
Innovative Power
TM
ActiveSwitcher
TM
is a trademark of Active-Semi.
I
2
C
TM
is a trademark of NXP
www.active-semi.com
Copyright © 2016-2017 Active-Semi, Inc.
1
ACT8870QJ-T
Rev 3.0, 02-Oct-2017
Typical Application Diagram
ACT8870
BUCK1 (4.0A)
BUCK2 (2.5A)
BUCK3 (2.5A)
MCU
DC/DC
REGULATOR
PG
BUCK4 (2.5A)
LDO1 (800mA)
LDO2 (200mA)
LDO3 (200mA)
SCL
SDA
nRESET
IRQ
ENABLE
Innovative Power
TM
ActiveSwitcher
TM
is a trademark of Active-Semi.
I
2
C
TM
is a trademark of NXP
www.active-semi.com
Copyright © 2016-2017 Active-Semi, Inc.
2
ACT8870QJ-T
Rev 3.0, 02-Oct-2017
FUNCTIONAL BLOCK DIAGRAM
VIN
Supply
ACT8870
VIN
VIN
MODE
GPIO
IO Supply
VIO_IN
VIN_B1
Supply
FB_B1
Vref
PWREN
SCK
VIO_IN
VIO_IN
Buck1 and
Bypass
Controller
1µF
SW_B1
FB_B1
PGND_B 1
2x22µF
VIO_IN
SDA
IRQ
VIO_IN
VIO_IN
VIO_IN
nRESET_AUX1
VIO_IN
nRESET_AUX2
nRESET
VIO_IN
Digital
Core
VIN_B2
Supply
FB_B2
Vref
VIO_IN
Buck2
Controller
1µF
SW_B2
FB_B2
PGND_B2
22µF
POK
PG
VIO_IN
VIN_B3
ENABLE
Power _Good
EXT_EN
EXT_PG
VIO
_IN
VIO_IN
Supply
FB_B3
Supply
VIN_LDO23
Vref
Buck3
Controller
1µF
SW_B3
FB_B3
PGND_B3
22µF
Vref
OUT_LDO3
1µF
VIN_B4
Vref
Supply
FB_B4
OUT_LDO2
1µF
VIN_LDO1
Vref
Vref
Buck4
Controller
1µF
SW_B4
FB_B4
PGND
_B4
22µF
Supply
OUT_LDO1
1µF
AGND
Innovative Power
TM
ActiveSwitcher
TM
is a trademark of Active-Semi.
I
2
C
TM
is a trademark of NXP
www.active-semi.com
Copyright © 2016-2017 Active-Semi, Inc.
3
ACT8870QJ-T
Rev 3.0, 02-Oct-2017
ORDERING INFORMATION
PART NUMBER
ACT8870QJ101-T
ACT8870QJ102-T
ACT8870QJ104-T
V
OUT1
Off
3.3V
3.3V
V
OUT2
1.5V
1.5V/1.35V
1.5V/1.35V
V
OUT3
1.25V
1.2V/1.8V
1.2V/1.8V
V
OUT4
3.3V
1.15V
1.2V
V
LDO1
3.3V
3.3V
3.3V
V
LDO2
1.8V
1.8V
1.8V
V
LDO3
2.5V
1.8V
1.8V
Device ID
0x7DFh
0x2Fh
0x0Bh
0x0Dh
Package
5x5 40 pin
5x5 40 pin
5x5 40 pin
ACT88 70Q Jxxx-T
Product Number
Package Code
Pin Count
CMI Option
Tape and Reel
Note 1: Standard product options are identified in this table. Contact factory for custom options, minimum order quantity required.
Note 2: All Active-Semi components are RoHS Compliant and with Pb-free plating unless specified differently. The term Pb-free means semiconductor
products that are in compliance with current RoHS (Restriction of Hazardous Substances) standards.
Note 3: Package Code designator “Q” represents QFN
Note 4: Pin Count designator “J” represents 40 pins
Note 5: “xxx” represents the CMI (Code Matrix Index) option The CMI identifies the IC’s default register settings.
Innovative Power
TM
ActiveSwitcher
TM
is a trademark of Active-Semi.
I
2
C
TM
is a trademark of NXP
www.active-semi.com
Copyright © 2016-2017 Active-Semi, Inc.
4
ACT8870QJ-T
Rev 3.0, 02-Oct-2017
PIN CONFIGURATION - QFN
SW_B1
VIN_B1
VIN_B1
GPIO
VIN_B4
33
32
SW_B1
VIN
40
39
38
37
36
35
34
PG
TOP VIEW
31
SW_B4
FB_B1
IRQ
PGND1
PGND1
POK
PGND2
SW_B2
VIN_B2
FB_B2
OUT_LDO1
VIN_LODO1
1
2
3
4
5
6
7
8
9
10
11
12
ACT8870
EXPOSED
PAD
30
29
28
27
26
25
24
23
22
21
MODE
FB_B4
PGND4
PGND3
SW_B3
VIN_B3
FB_B3
OUT_LDO3
VIN_LDO23
OUT_LDO2
13
14
15
16
17
18
19
EXT_EN
EXT_PG
AGND
PWREN
nRESET
nRESET_AUX2
nRESET_AUX1
QFN
Figure 1: Pin Configuration – Top View – QFN55-40
Innovative Power
TM
ActiveSwitcher
TM
is a trademark of Active-Semi.
I
2
C
TM
is a trademark of NXP
VIO_IN
www.active-semi.com
Copyright © 2016-2017 Active-Semi, Inc.
SDA
SCL
5
20
微控制器 MCU
