Microchip MIC33M356 Handleiding

Microchip Niet gecategoriseerd MIC33M356

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2020 Microchip Technology Inc. DS20006349A-page 1
MIC33M356
Features
• Input Voltage Range: 2.4V to 5.5V
• 3A Output Current
• Multiple Faults Indication through I
2C
• I2C Programmable:
- Output voltage:
0.6V to 1.28V at 5 mV resolution or
0.6V to 3.84V, 10 and 20 mV resolution
- Slew rate: 0.2 ms/V to 3.2 ms/V
- On-time (switching frequency)
- High-side current limit: 3.5A or 5A
- Enable delay: 0.2 ms-3 ms
- Output discharge when disabled (EN = GND)
• High Efficiency (up to 95%)
• Ultra-Fast Transient Response
• ±1.5% Output Voltage Accuracy Over
Line/Load/Temperature Range
• Safe Start-up with Pre-Biased Output
• Typical 1.5 µA Shutdown Supply Current
• Low Dropout (100% Duty Cycle) Operation
• I2C Speed Up to 3.4 MHz
• Latch-Off Thermal Shutdown Protection
• Latch-Off Current Limit Protection
• Power Good (PG) Open-Drain Output
• Meets the CISPR32 Class B Emissions
Applications
• Solid-State Drives (SSD)
• Tablets, Notebooks and Ultrabooks
• FPGAs, DSP and Low-Voltage ASIC Power
General Description
The Microchip MIC33M356 is a I2C programmable,
high-efficiency, low-voltage input, 3A current, synchro-
nous step-down regulator power module with
integrated inductor. The Constant On-Time (COT)
control architecture with HyperLight Load
® mode
provides very high efficiency at light loads, while still
having ultra-fast transient response.
The I2C interface allows programming the output volt-
age between 0.6V and 1.28V, with 5 mV resolution or
between 0.6V and 3.84V, with 10 mV and 20 mV reso-
lution. Two different default voltage options (0.9V and
1.0V) are provided so that the application can be
started with a safe voltage level and then moved to
high-performance modes under I2C control.
An open-drain Power Good output facilitates output
voltage monitoring and sequencing. If set in shutdown
(EN = GND), the MIC33M356 typically draws 1.5 µA of
current, while the output is discharged through a 10
pull-down resistor (if the output discharge feature is
enabled).
The MIC33M356 pinout is compatible with the
Microchip MIC33M350, so that applications can be
easily converted.
The 2.4V to 5.5V input voltage range, low shutdown and
quiescent currents make the MIC33M356 ideal for
single-cell Li-Ion battery-powered applications. The 100%
duty cycle capability provides low dropout operation,
extending operating range in portable systems.
The MIC33M356 is available in a thermally-efficient,
24-lead, 3.0 mm × 4.5 mm × 1.8 mm QFN package,
with an operating junction temperature range of -40°C
to +125°C.
FIGURE 1: Radiated Emissions,
CISPR32, Class B (VIN = 5V, VOUT = 1V,
IOUT = 3A).
3A, Power Module Buck Converter
with HyperLight Load® Mode and I2C Interface
MIC33M356
DS20006349A-page 2 2020 Microchip Technology Inc.
Typical Application
Package Type
VIN
2.4V to 5.5V
VOUT
1.0V/3A
SW
MIC33M356
22 µF
SCLSCL
PVIN
47 µF
P
GND
PG
VOUT
Power Good
SDASDA
ENEN
SVIN
OUT
0.1 µF
A
GND 100k
VIN
2 4 Nȍ
2 4 Nȍ
VIN
VIN
1 µF
*Includes Exposed Thermal Pads (EP); see Table 3-1.
MIC33M356 Top View
24-Pin QFN 3 mm × 4.5 mm
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Ordering Information
Part Number
Default Status at Power-up
Output Voltage
Range/Step
Output
Voltage
High-Side
Current Limit
(typical)
TON[1:0]
(ns)
Soft Start
Speed
Overtemp
Latch-Off
Output
Pull-Down
when Disabled
MIC33M356-HAYMP 1.0V 5A [10] = 130 ns 800 µs/V Latch-Off
after 4 OT
Cycles
Yes 0.600V-1.280V/5 mV
MIC33M356-FAYMP 0.9V 5A [10] = 130 ns 800 µs/V Latch-Off
after 4 OT
Cycles
Yes 0.600V-1.280V/5 mV
MIC33M356-SAYMP 1.0V 5A [10] = 130 ns 800 µs/V Latch-Off
after 4 OT
Cycles
Yes 0.600V-1.280V/10 mV
1.280V-3.840V/20 mV
2020 Microchip Technology Inc. DS20006349A-page 3
MIC33M356
Functional Block Diagram
VOUT
0.6V-3.84V
/3A
MIC33M356
EN
OUT
PGND
SVIN
PVIN VIN
2.4V to 5.5V
22 µF
Control
Logic
TON
ADJUST
PVIN
MINIMUM
TOFF
PG
100k
VIN
PG
HSD
LSD
I2C
CONTROL
AND
REGISTERS
L1
0.47 µH
8-Bit
DAC
ZC
SDA
SCL
RIPPLE
INJECTION
COMP
VREF -9%
VREF
DELAY
165°C/143°C
OT
AGND
2.225V/
2.072V
UVLO
PD
PD
10ȍ
EA
SW
1 µF
0.1µF47 µF

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: MIC33M356

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