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PDF RT5028C Data sheet ( Hoja de datos )
| Número de pieza | RT5028C | |
| Descripción | PMIC | |
| Fabricantes | Richtek | |
| Logotipo |  |
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®
RT5028C
PMIC for Industrial Application
General Description
The RT5028C is a highly-integrated low-power high-
performance analog SOC with PMIC in one single chip
designed for Industrial applications.
The RT5028C includes four synchronous step-down DC/
DC converters and eight LDOs for system power.
The RT5028C also embeds one EEPROM (MTP) for
setting sequence and timing etc.
Additionally, the RT5028C PMIC also includes one IRQ
report.
Applications
Industrial
Ordering Information
RT5028C
Package Type
QW : WQFN-56L 7x7 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Features
Input Voltage Operating Range is 3.3V to 5.5V
Step-Down Regulator : VIN Range is 3.3V to 5.5V
Max Current 2.4A/2A/1.6A/2A
Programmable Frequency from 500kHz to 2MHz
I2C Programmable Output Level
I2C Programmable Operation Mode (Force PWM
or Auto PSM/PWM)
I2C Programmable Output Discharge Mode
(Discharge or Flatting)
Linear Regulators : VIN Range is 2.5V to 5.5V
Max Current 0.3A
I2C Programmable Output Level
Embedded 32Bytes MTP for Factory Tuning
External MTP Pin for Write Protection
Sequence can be Controlled by I2C or each EN pins
Defined by MASK_GPIO pin.
OT/UVP/VIN LV/POWRON press Time Interrupt
(IRQ).
I2C Control Interface: Support Fast Mode up to
400kb/s
RoHS Compliant and Halogen Free
Simplified Application Circuit
RT5028C
VIN VOUTLx
VDDP
SCL
VINL123
VINL456
VINL78
SDA
IRQ
RESET
PWRHOLD
LXBx
PWRON
VOUTBxS
VINBx
REBOOT
MTP
ENBx
MASK_GPIO
ENLx
SADDR
AGND
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS5028C-00 March 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT5028C
Operation
The RT5028C is a highly-integrated solution for industrial
system including 4-CH step-down DC/DC converters and
8-CH LDOs. The RT5028C application mechanism will be
introduced in later sections.
The power-on and power-off sequences can be controlled
by I2C or each EN pin and detected in MASK_GPIO pin.
When the MASK_GPIO pin is at Hi level, the PMIC follows
the power-on sequence to turn on channels. When the
MASK_GPIO pin is at Lo level, the channels of PMIC will
be controlled by the EN pin.
Synchronous Step-Down DC/DC Converter
Four current mode synchronous step-down DC/DC
converters operate with internal power MOSFETs, FB
resistors and compensation network. These channels are
suitable for core power in industrial system. They can be
operated at 100% maximum duty cycle to extend battery
operating voltage range. When the input voltage is close
to the output voltage, the converter enters low dropout
mode with low output ripple. The operating frequency of
step-down converter is adjustable from 500kHz to 2MHz
and is controlled by I2C. Besides, the I2C interface also
can be used to select different operation modes, On/Off
Sequence, programmable the output voltage, RAMP
control and discharge function. To enable AUTO Mode, it
is used to improve the efficiency at light load. If the AUTO
Mode is disabled, the converter operates in force PWM
mode with fixed switching frequency.
Linear Regulator
Eight generic low voltage LDOs for multiple purpose power.
The LDOs are stable over the entire operating load range
with the use of external ceramic capacitors. The LDOs
also have I2C programmable power on/off sequence and
discharge function. The output voltage is adjustable by
the I2C interface in the range of 1.6V to 3.6V.
Over-Temperature Protection
An Over-Temperature Protection (OTP) is contained in the
device. The protection is triggered to force the device
shutdown for protecting itself when the junction
temperature exceeds 165°C typically. Once the junction
temperature drops below the hysteresis 10°C typically,
the device must be re-send PWRON to start system.
Output Under-Voltage Protection
The output under-voltage protection is implemented in order
to prevent operation at low output voltage conditions.
When the step-down DC/DC converters output voltage is
lower than 1/2 x (VOUT), the UVP event triggers and PMIC
turns off immediately.
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS5028C-00 March 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
RT5028C
CH3 Buck Output Voltage vs. Output Current
1.25
1.24
1.23
1.22
1.21
1.20
1.19
VIN = 3.3V
VIN = 3.6V
VIN = 3.9V
VIN = 4.2V
VIN = 5V
VIN = 5.5V
1.18
1.17
0
L = 2.2μH, COUT = 10μF
200 400 600 800 1000 1200 1400 1600
Output Current (mA)
CH1 Buck Output Voltage vs. Input Voltage
1.40
1.39
1.38
1.37
1.36
1.35
1.34
1.33
1.32
1.31
1.30
3.3
IOUT = 0mA
IOUT = 500mA
IOUT = 1000mA
IOUT = 1500mA
IOUT = 2000mA
IOUT = 2400mA
L = 2.2μH, COUT = 10μF
3.8 4.3 4.8
Input Voltage (V)
5.3
5.8
CH3 Buck Output Voltage vs. Input Voltage
1.24
1.23
1.22
1.21
1.20
1.19
1.18
1.17
1.16
IOUT = 0mA
IOUT = 500mA
IOUT = 1000mA
IOUT = 1600mA
1.15
1.14
3.3
L = 2.2μH, COUT = 10μF
3.8 4.3 4.8 5.3
Input Voltage (V)
5.8
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS5028C-00 March 2015
CH4 Buck Output Voltage vs. Output Current
3.38
3.33
3.28
VIN = 3.6V
VIN = 3.9V
VIN = 4.2V
VIN = 4.5V
VIN = 5V
VIN = 5.5V
3.23
3.18
3.13
3.08
0
L = 2.2μH, COUT = 10μF
500
1000
1500
Output Current (mA)
2000
CH2 Buck Output Voltage vs. Input Voltage
1.55
1.53
1.51
1.49
1.47
1.45
3.3
IOUT = 0mA
IOUT = 500mA
IOUT = 1000mA
IOUT = 1500mA
IOUT = 2000mA
L = 2.2μH, COUT = 10μF
3.8 4.3 4.8
Input Voltage (V)
5.3
5.8
CH4 Buck Output Voltage vs. Input Voltage
3.80
3.60
3.40
3.20
3.00
2.80
IOUT = 0mA
IOUT = 500mA
IOUT = 1000mA
IOUT = 1500mA
IOUT = 2000mA
2.60
2.40
3.3
L = 2.2μH, COUT = 10μF
3.8 4.3 4.8 5.3
Input Voltage (V)
5.8
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet RT5028C.PDF ] | |
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