MIC2230-GFHYML-TR [MICROCHIP]
1.8A SWITCHING REGULATOR, 2875kHz SWITCHING FREQ-MAX, PDSO12;
| 型号： | MIC2230-GFHYML-TR |
| 厂家： | 
MICROCHIP |
| 描述： | 1.8A SWITCHING REGULATOR, 2875kHz SWITCHING FREQ-MAX, PDSO12 开关 光电二极管 输出元件 |
| 文件： | 总26页 (文件大小：1275K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC2230
Dual Synchronous 800 mA/800 mA Step-Down DC/DC Regulator
Features
General Description
• High Efficiency: Over 96%
The MIC2230 is a dual output, high-efficiency
synchronous step-down DC/DC converter. The
MIC2230 is ideally suited for portable and embedded
systems that demand high power conversion
efficiencies and fast transient performance, while
offered in a very small package. The MIC2230 offers an
ultra-low quiescent current in light load mode, assuring
minimum current draw from battery powered
applications in standby modes. The MIC2230 was
designed to only require miniature 2.2 μH inductors
and 10 μF ceramic capacitors.
• Ultra-Low Quiescent Current: Only 28 μA
• Ultra-Low Shutdown Current: Less Than 1 μA
• Fast Transient Performance
• 2.5 MHz PWM Operation
• High Output Current Capability per Channel:
800 mA
• No Schottky Diodes Required
• Stable with 2.2 μH Inductor, 10 μF Ceramic
Capacitor
The MIC2230 features a selectable mode that allows
the user to trade-off lowest noise performance for low
power efficiency. Trickle mode operation provides
ultra-high efficiency at light loads, while PWM operation
provides very low ripple noise performance. To
maximize battery life in low-dropout conditions,
MIC2230 can operate with a maximum duty cycle of
100%.
• Adjustable Output Voltage Down to 0.8V
• Built-In Soft-Start Circuitry
• Current-Limit Protection
• Automatic Switching into Light Load Mode
Operation
• /FPWM Pin allows Low-Noise Forced PWM Mode
Operation
• Power Good Output with Internal 5 μA Current
Source allows Sequencing with Programmable
Delay Time
The MIC2230 is available in
3 mm × 3 mm TDFN-12L package with a junction
temperature range from –40°C to +125°C.
a
space-saving
• Small Thermally Enhanced 3 mm × 3 mm
TDFN-12L Package
Package Types
Applications
• MPU & ASIC Power
• PDAs
MIC2230
3x3 TDFN* (Fixed)
Top View
• Digital Cameras
• PC Cards
OUT2
EN2
1
2
3
4
5
6
12 OUT1
11 EN1
• Wireless and DSL Modems
AVIN
10 PGOOD
SW2
9
8
7
VIN
AGND
PGND
SW1
/FPWM
MIC2230
3x3 TDFN* (Adjustable)
Top View
FB2
1
2
3
4
5
6
12 FB1
EN2
AVIN
11 EN1
10 PGOOD
SW2
9
8
7
VIN
AGND
PGND
SW1
/FPWM
2017 Microchip Technology Inc.
DS20005748A-page 1
MIC2230
Typical Application Circuit
MIC2230
3x3 TDFN
VIN
2.5V to 5.5V
10μF
AVIN
EN1
VIN
ON
ON
OFF
EN2
OFF
390pF
/FPWM
SW1
PGOOD
2.2μH
2.2μH
MIC2230
VOUT
2
VOUT
1.8V / 800mA
10μF
1
SW2
OUT2
PGND
1.575V / 800mA
OUT1
AGND
10μF
Functional Block Diagram
AVIN
EN2
VIN
EN1
ISENSE1
ISENSE2
ENABLE
LOGIC
HSD
HSD
Anti
SW1
Anti
Shoot-through
Logic
SW2
Shoot-through
Logic
EA1
EA2
AVIN
LSD
LSD
Compensation
Trickle Mode
Logic
0.8V
0.8V
/FPWM
1kΩ
5μA
PGOOD
FB1
FB2
PGND
AGND
DS20005748A-page 2
2017 Microchip Technology Inc.
MIC2230
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage, (VIN) ................................................................................................................................................. +6V
Enable 1 Voltage........................................................................................................................................................ +6V
Enable 2 Voltage........................................................................................................................................................ +6V
Logic Input Voltage, (VEN, VFPWM)..................................................................................................................... 0V to VIN
ESD Protection.........................................................................................................................................................+2 kV
Operating Ratings ††
Supply Voltage, VIN..................................................................................................................................... +2.5V to 5.5V
† Notice: Exceeding the absolute maximum rating may damage the device.
†† Notice: The device is not guaranteed to function outside its operating rating.
DC CHARACTERISTICS (Note 1)
Electrical Characteristics: Unless otherwise indicated, TA = 25°C with VIN = VEN1 = VEN2 = 3.6V, VOUT1, VOUT2
:
L = 2.2 μH, C = 10 μF. Bold values indicate –40ºC TJ +125ºC.
Parameters
Sym.
Min.
Typ.
Max.
Units
Conditions
Supply Voltage and Current
Supply Voltage Range
UVLO (Rising)
2.5
2.3
—
—
2.4
100
5.5
2.5
—
V
V
—
—
—
UVLO Hysteresis
mV
/FPWM = Low; VOUT1
OUT2 = 1.03 * VNOM (not
switching)
,
PWM Mode Supply
Current
—
560
950
μA
V
/FPWM = High; VOUT1
OUT2 = 1.03 * VNOM (not
switching)
,
Trickle Mode Supply
Current
—
—
28
50
μA
μA
V
Shutdown Quiescent
Current
0.1
1
VEN = 0V
Output Voltage Accuracy
Feedback Voltage, VFB
Output Voltage, VOUT
Feedback Bias Current
0.780
–2.5
—
0.8
—
0.820
+2.5
—
V
%
Adjustable
Fixed Output Options
—
10
nA
Output Voltage Line
Regulation
—
—
—
0.1
0.5
40
0.5
%
%
2.5V VIN 5.5V
VIN = 5V, IOUT = 10 mA to
800 mA, /FPWM = 0V
Output Voltage Load
Regulation
—
VIN = 3V; IOUT = 10 mA to
800 mA, /FPWM = 0V
VIN=3.6V; IOUT = 1 mA;
Ripple in Trickle Mode
—
mV
C
OUT = 10 μF, L = 2.2 μH.
Note 1: Specification for packaged product only.
2017 Microchip Technology Inc.
DS20005748A-page 3
MIC2230
DC CHARACTERISTICS (Note 1) (CONTINUED)
Electrical Characteristics: Unless otherwise indicated, TA = 25°C with VIN = VEN1 = VEN2 = 3.6V, VOUT1, VOUT2
:
L = 2.2 μH, C = 10 μF. Bold values indicate –40ºC TJ +125ºC.
Parameters
Logic Inputs
Sym.
Min.
Typ.
Max.
Units
Conditions
—
0.3
0.8
0.7
0.01
—
1.2
V
V
On
Off
—
EN Input Threshold
EN Input Current
—
—
1
0.6×VIN
—
μA
V
—
On
Off
—
/FPWM Input Threshold
0.3×VIN
—
—
V
/FPWM Input Current
Protection
0.01
1
μA
Current-Limit
0.9
100
1.2
—
1.8
—
A
%
—
—
—
Control
Maximum Duty Cycle
Oscillator
PWM Mode Frequency
Power Good
2.125
2.5
2.875
MHz
—
6.25
–8.5
12
%
%
Upper Threshold
Lower Threshold
Power Good Reset
Threshold
–14
—
PGOOD Series
Resistance
—
—
1
5
1.4
kΩ
μA
—
Output within 8.5% of
regulation
PGOOD Pull-Up Current
—
Power Switch
0.4
Ω
Ω
—
—
—
—
ISW = 150 mA (PFET)
ISW = 150 mA (NFET)
Switch On-Resistance
0.35
Note 1: Specification for packaged product only.
DS20005748A-page 4
2017 Microchip Technology Inc.
MIC2230
TEMPERATURE SPECIFICATIONS (Note 1)
Parameters
Temperature Ranges
Sym.
Min.
Typ.
Max.
Units
Conditions
Storage Temperature Range
Junction Operating Temperature
Package Thermal Resistances
TA
TJ
–65
–40
—
—
+150
+125
°C
°C
—
—
JA
JC
—
—
60
15
—
—
°C/W
°C/W
—
—
Thermal Resistance, 3 x 3 QFN-12Ld
Note 1: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable
junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the
maximum allowable power dissipation will cause the device operating junction temperature to exceed the
maximum +125°C rating. Sustained junction temperatures above +125°C can impact the device reliability.
2017 Microchip Technology Inc.
DS20005748A-page 5
MIC2230
2.0
TYPICAL PERFORMANCE CURVES
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
FIGURE 2-1:
Temperature.
Enabled Threshold vs.
Frequency vs. Temperature.
Efficiency.
FIGURE 2-4:
V = 1.575V.
OUT
MIC2230 Efficiency
MIC2230 Efficiency
MIC2230 Efficiency
FIGURE 2-2:
FIGURE 2-5:
= 1.8V.
V
OUT
FIGURE 2-3:
FIGURE 2-6:
= V
V
= 1.8V.
OUT1
OUT2
DS20005748A-page 6
2017 Microchip Technology Inc.
MIC2230
.
FIGURE 2-7:
Time.
Capacitance vs. Delay
Trickle Mode Current vs.
Output Voltage vs. Input
FIGURE 2-10:
Output Voltage vs. Load.
FIGURE 2-11:
Supply Voltage.
Enable Threshold vs.
FIGURE 2-8:
Input Voltage.
FIGURE 2-12:
Temperature.
Feedback Voltage vs.
FIGURE 2-9:
Voltage.
2017 Microchip Technology Inc.
DS20005748A-page 7
MIC2230
FIGURE 2-16:
Mode.
Load Transient Trickle
FIGURE 2-13:
Temperature.
Output Voltage vs.
V
= 3.6V
VIN = 1.8V
LO=UT2.2μH
0A
/FPWM = 0
IOUT = 400mA
200ns/div
FIGURE 2-17:
Mode.
Load Transient Trickle
FIGURE 2-14:
FPWM Mode.
FIGURE 2-15:
Trickle Mode.
FIGURE 2-18:
Load Transient PWM Mode.
DS20005748A-page 8
2017 Microchip Technology Inc.
MIC2230
FIGURE 2-19:
Load Transient PWM Mode.
FIGURE 2-20:
Enable Response.
2017 Microchip Technology Inc.
DS20005748A-page 9
MIC2230
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
MIC2230
MIC2230
Adjustable
3X3 QFN
Fixed
Symbol
Description
3X3 QFN
1
—
FB2
Feedback 2: For adjustable voltage options connect the exter-
nal resistor divider network to FB2 to set the output voltage of
regulator 2. Nominal value is 0.8V.
Enable 2 input. Logic low powers down regulator 2. Logic high
powers up regulator 2. MIC2230 features built-in soft-start
circuitry that reduces in-rush current and prevents the output
voltage from overshooting at start up.
2
3
2
3
EN2
Analog Supply Voltage: Supply voltage for the analog control
circuitry. Requires bypass capacitor to GND.
AVIN
4
5
6
4
5
6
SW2
AGND
PGND
Switch node for regulator 2, connected to external inductor.
Analog (signal) ground.
Power ground.
Forced PWM Mode Bar. Grounding this pin forces the device to
7
7
/FPWM stay in constant frequency PWM mode only. Pulling this pin
high enables automatic Trickle Mode operation.
8
9
8
9
SW1
Switch node for regulator 1, connected to external inductor.
Supply Voltage: Supply voltage for the internal switches and
drivers. Requires bypass capacitor to GND.
VIN
Power Good Output. This output is pulled down unless the
regulator 1 output voltage is within +6.25% and –8.5% of
10
10
PGOOD regulation. After the output voltage is in regulation, the output
starts to go high with an internal 5 μA current source. A delay
time could be programmed by tying a capacitor to this pin.
Enable 1 input. Logic low powers down regulator 1. Logic high
powers up regulator 1. MIC2230 features built-in soft-start
circuitry that reduces in-rush current and prevents the output
voltage from overshooting at start up.
11
12
11
–
EN1
Feedback 1: For adjustable voltage options connect to the
external resistor divider network to FB1 to set the output
voltage of regulator 1. Nominal value is 0.8V.
FB1
Output Voltage 2. For fixed output voltage options connect
OUT2 to the output voltage of regulator 2.
–
–
1
OUT2
OUT1
EP
Output Voltage 1. For fixed output voltage options connect
OUT1 to the output voltage of regulator 1.
12
EP
Exposed Thermal pad. Should be connected to the Ground
plane.
EP
DS20005748A-page 10
2017 Microchip Technology Inc.
MIC2230
is recommended to prevent large output voltage
transients from triggering the PGOOD flag
unexpectedly.
4.0
4.1
FUNCTIONAL DESCRIPTION
V
IN
VIN provides power to the MOSFETs for the switch
mode regulator section, along with the current limiting
sensing. Due to the high switching speeds, a 10 μF
capacitor is recommended close to VIN and the power
ground (PGND) pin for bypassing.
5μA
PGOOD Pin
1k
External Cap
4.2
AV
IN
Analog VIN (AVIN) provides power to the analog supply
circuitry. AVIN and VIN must be tied together. Careful
layout should be considered to ensure high frequency
switching noise caused by VIN is reduced before
reaching AVIN. A 1 μF capacitor as close to AVIN as
possible is recommended.
FIGURE 4-1:
Power Good Circuit.
4.7
FB1/FB2
The feedback pin (FB) provides the control path to
control the output. For adjustable versions, a resistor
divider connecting the feedback to the output is used to
adjust the desired output voltage. The output voltage is
calculated as follows:
4.3
EN1
Enable 1 controls the on and off state of regulator 1. A
high logic on Enable 1 (EN1) activates regulator 1 while
a low logic deactivates regulator 1. MIC2230 features
built-in soft-start circuitry that reduces in-rush current
and prevents the output voltage from overshooting at
start-up.
EQUATION 4-1:
R1
R2
V OUT = V REF ------ + 1
4.4
EN2
Enable 2 controls the on and off state of regulator 2. A
high logic on Enable 2 (EN2) activates regulator 2 while
a low logic deactivates regulator 2. MIC2230 features
built-in soft-start circuitry that reduces in-rush current
and prevents the output voltage from overshooting at
start-up.
Where:
VREF
=
0.8V
The external feedback resistors add some quiescent
current consumption for adjustable versions. To reduce
battery current draw, high resistance values are
recommended in the feedback divider. A feedforward
capacitor should be connected between the output and
feedback (across R1) because of the high resistance
value. The large resistor value and the parasitic
capacitance of the FB pin can cause a high frequency
pole that can reduce the overall system phase margin.
By placing a feedforward capacitor, these effects can
be significantly reduced. Refer to the Feedback section
for recommended feedforward capacitor values.
4.5
/FPWM
The Forced PWM Mode selects the mode of operation
for this device. Grounding this pin forces the device to
stay in constant frequency PWM mode only. Pulling this
pin high enables automatic selection of Trickle or PWM
mode operation, depending on the load. While /FPWM
is high and the load is below 100 mA, the device will go
into Trickle Mode. If the load is above 100 mA, PWM
mode will automatically be selected. Do not leave this
pin floating.
4.8
SW1/SW2
The switch (SW) pin connects directly to the inductor
and provides the switching current necessary to
operate in PWM mode. Due to the high speed
switching on this pin, the switch node should be routed
away from sensitive nodes.
4.6
PGOOD
The Power Good Output is pulled down unless the
regulator 1 output voltage is within +6.25% or –8.5% of
regulation. When the output voltage is in regulation, the
PGOOD capacitor will be charged to AVIN by an
internal 5 μA current source through a 1 kꢀ resistor.
The charge time is approximately 1 μs per 1 pF of
capacitance. For example, a 390 pF capacitor at the
PGOOD pin will cause the PGOOD pin voltage to rise
from low to high in around 390 μs. A PGOOD capacitor
4.9
PGND
Power ground (PGND) is the ground path for the high
current PWM mode. The current loop for the power
ground should be as small as possible and separate
from the Analog ground (AGND) loop.
2017 Microchip Technology Inc.
DS20005748A-page 11
MIC2230
4.10 AGND
Signal ground (AGND) is the ground path for the
biasing and control circuitry. The current loop for the
signal ground should be separate from the Power
ground (PGND) loop.
DS20005748A-page 12
2017 Microchip Technology Inc.
MIC2230
The MIC2230 is designed to be stable with a 2.2 μH
inductor with a 10 μF ceramic (X5R) output capacitor.
5.0
5.1
APPLICATION INFORMATION
Input Capacitor
5.5
Feedback
A minimum 2.2 μF ceramic is recommended on the VIN
pin for bypassing. X5R or X7R dielectrics are
recommended for the input capacitor. Y5V dielectrics,
aside from losing most of their capacitance over
temperature, they also become resistive at high
frequencies. This reduces their ability to filter out high
frequency noise.
The MIC2230 provides a feedback pin to adjust the
output voltage to the desired level. This pin connects
internally to an error amplifier. The error amplifier then
compares the voltage at the feedback to the internal
0.8V reference voltage and adjusts the output voltage
to maintain regulation. Calculating the resistor divider
network for the desired output is shown in
Equation 5-1.
5.2
Output Capacitor
The MIC2230 was designed specifically for use with a
10 μF or greater ceramic output capacitor. The output
capacitor requires either an X7R or X5R dielectric. Y5V
and Z5U dielectric capacitors, aside from the
undesirable effect of their wide variation in capacitance
over temperature, become resistive at high
frequencies.
EQUATION 5-1:
R1
R2 = -----------------------------
V OUT
-------------- – 1
V REF
Where:
VREF
VOUT
=
=
0.8V
Desired Output Voltage
5.3
Inductor Selection
Inductor selection will be determined by the following
(not necessarily in the order of importance):
For adjustable versions, the FB bias current (10 nA
typical) should be a negligible fraction of the current
flowing in the feedback resistor divider. This improves
the accuracy of the output voltage setting. A small
current, in the range of a few microamperes, is typically
sufficient and does not significantly increase the
operating quiescent current in battery-operated
applications. This choice leads to high resistance
values.
• Inductance
• Rated current value
• Size requirements
• DC resistance (DCR)
The MIC2230 was designed for use with a 2.2 μH
inductor.
Maximum current ratings of the inductor are generally
given in two methods: permissible DC current and
saturation current. Permissible DC current can be rated
either for a 40°C temperature rise or a 10 to 20% loss
in inductance. Ensure the inductor selected can handle
the maximum operating current. When saturation
current is specified, make sure that there is enough
margin that the peak current will not saturate the
inductor.
If operating quiescent current is less of a concern,
lower resistance values can be used. Larger resistor
values require an additional capacitor (feed-forward)
from the output to the feedback. The large high-side
resistor value and the parasitic capacitance on the
feedback pin (~10 pF) can cause an additional pole in
the control loop. The additional pole can create a phase
loss at high frequencies. This phase loss degrades
transient response by reducing phase margin. Adding
feed-forward capacitance negates the parasitic
capacitive effects of the feedback pin. See Table 5-1
for recommended feedforward capacitor values.
The size requirements refer to the area and height
requirements that are necessary to fit a particular
design. Please refer to the inductor dimensions on their
datasheet.
TABLE 5-1:
RECOMMENDED
FEED-FORWARD
CAPACITOR
DC resistance is also important. While DCR is inversely
proportional to size, DCR can represent a significant
efficiency loss. Refer to the Efficiency Considerations.
Total Feedback
Resistance
Recommended CFF
5.4
Compensation
22 pF
47 pF
1 Mꢀ - 2 Mꢀ
500 kꢀ - 1 Mꢀ
100 kꢀ - 500 kꢀ
10 kꢀ - 100 kꢀ
The MIC2230 is an internally compensated, current
mode buck regulator. Current mode is achieved by
sampling the peak current and using the output of the
error amplifier to pulse width modulate the switch node
and maintain output voltage regulation.
100 pF
180 pF
2017 Microchip Technology Inc.
DS20005748A-page 13
MIC2230
Large feedback resistor values increase impedance,
making the feedback node more susceptible to noise
pick-up. A feed forward capacitor would also reduce
noise pick-up by providing a low impedance path to the
output. Refer to Table 5-1 for recommended
feedforward capacitor values
DS20005748A-page 14
2017 Microchip Technology Inc.
MIC2230
Over 100 mA, efficiency loss is dominated by MOSFET
RDS(ON) and inductor losses. Higher input supply
voltages will increase the Gate-to-Source threshold on
5.6
Efficiency Considerations
Efficiency is defined as the amount of useful output
power, divided by the amount of power supplied.
the internal MOSFETs, reducing the internal RDS(ON)
.
This improves efficiency by reducing DC losses in the
device. All but the inductor losses are inherent to the
device. In which case, inductor selection becomes
increasingly critical in efficiency calculations. As the
inductors are reduced in size, the DC resistance (DCR)
can become quite significant. The DCR losses can be
calculated as shown in Equation 5-3.
EQUATION 5-2:
V OUT IOUT
Efficiency_% = ---------------------------------- 100
V IN IIN
Maintaining high efficiency serves two purposes. It
reduces power dissipation in the power supply,
reducing the need for heat sinks and thermal design
considerations and it reduces consumption of current
for battery powered applications. Reduced current
draw from a battery increases the devices operating
time and is critical in hand held devices.
EQUATION 5-3:
L_Pd = IOUT2 DCR
From that, the loss in efficiency due to inductor
resistance can be calculated as shown in Equation 5-4.
There are two types of losses in switching converters:
DC losses and switching losses. DC losses are simply
the power dissipation of I2R. Power is dissipated in the
high-side switch during the on cycle. Power loss is
equal to the high side MOSFET RDS(ON) multiplied by
the Switch Current2. During the off cycle, the low side
N-channel MOSFET conducts, also dissipating power.
Device operating current also reduces efficiency. The
product of the quiescent (operating) current and the
supply voltage is another DC loss. The current required
driving the gates on and off at a constant 2.5 MHz
frequency and the switching transitions make up the
switching losses.
EQUATION 5-4:
VOUT IOUT
Efficiency_Loss = 1 – ----------------------------------------------------- 100
V OUT IOUT + L_Pd
Efficiency loss due to DCR is minimal at light loads and
gains significance as the load is increased. Inductor
selection becomes a trade-off between efficiency and
size in this case.
5.7
Trickle Mode Operation
Trickle Mode operation is achieved by clamping the
minimum peak current to approximately 150 mA. This
forces a PFM mode by comparing the output voltage to
the internal reference. If the feedback voltage is less
than 0.8V, the MIC2230 turns on the high side until the
peak inductor current reaches approximately 150 mA.
A separate comparator then monitors the output
voltage. If the feedback voltage is greater than 0.8V,
the high side switch is then used as a 10 μA current
source, never turning off completely. This creates a
highly efficient light load mode by increasing the time it
takes for the output capacitor to discharge, delaying the
amount of switching required and increasing light load
efficiency. While operating in this mode without any
load, the output voltage may rise over the nominal
operating voltage range. For applications that require
tight voltage tolerances, a minimum load of 150 μA is
recommended.
FIGURE 5-1:
= 1.575.
MIC2230 Efficiency
V
OUT
The figure above shows an efficiency curve. From no
load to 100 mA, efficiency losses are dominated by
quiescent current losses, gate drive and transition
losses. By forcing the MIC2230 into Trickle Mode
(/FPWM = High), the buck regulator significantly
reduces the required switching current by entering into
a PFM (Pulse Frequency Modulation) mode. This
significantly increases efficiency at low output currents.
This load may either be used by the attached system,
by lowering the feedback resistors or by adding an
additional load resistor in parallel with the output
capacitor.
2017 Microchip Technology Inc.
DS20005748A-page 15
MIC2230
When the load current is greater than approximately
100 mA, the MIC2230 automatically switches to PWM
mode.
5.8
FPWM Operation
In forced PWM Mode (/FPWM = LOW) the MIC2230 is
forced to provides constant switching at 2.5 MHz with
synchronous internal MOSFETs throughout the load
current. In FPWM Mode, the output ripple can be as
low as 7 mV.
DS20005748A-page 16
2017 Microchip Technology Inc.
MIC2230
6.0
MIC2230 EVALUATION BOARD SCHEMATIC
J1
+VIN 2.5V to 5.5V
U1 MIC2230YML
3
9
AVIN
VIN
C2
C1
1μF
10μF
J7
2
7
4
1
5
11
10
8
J8
EN2
EN1
EN2
EN1
J4
FPWM
SW2
PGOOD
SW1
PGOOD
L1
2.2μH
L2
C3
2.2μH
390pF
J3
VO2
1.8V
J5
VO1
1.8V
C5
C6
R3
R1
22pF
22pF
549k
549k
12
6
FB2/Vo2
AGND
FB1/Vo1
PGND
C4
C7
10μF
10μF
R4
R2
442k
442k
J2
J6
GND
GND
FIGURE 6-1:
MIC2230 Adjustable Option (1.8V, 1.8V).
TABLE 6-1:
Item
BILL OF MATERIALS
Part Number
Manufacturer
Description
Qty
10 μF Ceramic Capacitor, 6.3V, X5R,
Size 0603
C1
C2
C1608X5R0J106K
TDK
TDK
1
1
1
2
1 μF Ceramic Capacitor, 6.3V, X5R,
Size 0402
C1005X5R0J105K
C0603Y391KXXA
0603ZD106MAT
390 pF Ceramic Capacitor, 25V, X7R,
Size 0603
C3
Vishay
AVX
10 μF Ceramic Capacitor, 6.3V, X5R,
Size 0603
C4, C5
CDRH2D11/HPNP-2
R2NC
2.2 μH, 1.1A ISAT., 120 mꢀ,
(1.2 mm × 3.2 mm × 3.2 mm)
Sumida
Murata
Coilcraft
2.2 μH, 900 mA ISAT., 110 mꢀ,
(2.6 mm × 3.2 mm × 4.5 mm)
L1, L2
LQH43CN2R2M03
EPL2014-222MLB
2
2.2 μH, 1.3A ISAT., 120 mꢀ,
(1.4 mm x 1.8 mm x 2.0 mm)
R2, R4
R1, R3
U1
CRCW06034423FT1
CRCW06035493FT1
MIC2230-AAYML
Vishay
Vishay
442 kꢀ, 1%, Size 0603
2
2
1
549 kꢀ, 1%, Size 0603
Microchip
2.5 MHz Dual Phase PWM Buck Regulator
CDRH2D11/HPNP-2
R2NC
2.2 μH, 1.1A ISAT., 120 mꢀ,
(1.2 mm × 3.2 mm × 3.2 mm)
L1, L2
Sumida
2
2017 Microchip Technology Inc.
DS20005748A-page 17
MIC2230
7.0
7.1
PACKAGING INFORMATION
Package Marking Information
12-lead QFN*
Example
XX
XXXX
YWWY
AA
2230
1246
Legend: XX...X Product code or customer-specific information
Y
Year code (last digit of calendar year)
YY
WW
NNN
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
e
3
Pb-free JEDEC® designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator (
can be found on the outer packaging for this package.
*
e
3
)
●, ▲, ▼ Pin one index is identified by a dot, delta up, or delta down (triangle
mark).
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information. Package may or may not include
the corporate logo.
Underbar (_) and/or Overbar (‾) symbol may not be to scale.
DS20005748A-page 18
2017 Microchip Technology Inc.
MIC2230
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging.
2017 Microchip Technology Inc.
DS20005748A-page 19
MIC2230
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging.
DS20005748A-page 20
2017 Microchip Technology Inc.
MIC2230
APPENDIX A: REVISION HISTORY
Revision A (April 2017)
• Converted Micrel document MIC2230 to Micro-
chip data sheet template DS20005748A.
• Minor grammatical text changes throughout.
2017 Microchip Technology Inc.
DS20005748A-page 21
MIC2230
NOTES:
DS20005748A-page 22
2017 Microchip Technology Inc.
MIC2230
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office.
Examples:
PART NO.
Device
-XX
X
XX
a)
MIC2230-AAYML TR: Dual Synchronous
800 mA/800 mA, Step-
Down DC/DC Regulator,
Adjustable Output Volt-
age, –40°C to +125°C,
12LD TDFN, Tape and
Reel
Output
Voltage
Temperature
Range
Package
Device:
MIC2230:
Dual Synchronous 800 mA/800 mA
Step-Down DC/DC Regulator
b)
MIC2230-G4YML TR: Dual Synchronous
800 mA/800 mA, Step-
Down DC/DC Regulator,
1.8V/1.2V Output Volt-
age, –40°C to +125°C,
12LD TDFN, Tape and
Reel
Output Voltages:
AA
G4
GFH
GS
J4
=
=
=
=
=
=
=
Adjustable
1.8V / 1.2V
1.8V / 1.575V
1.8V / 3.3V
2.5V / 1.2V
3.3V / 1.2V
3.3V / 3.3V
(VOUT1, VOUT2
)
S4
SS
c)
d)
MIC2230-GFHYML TR: Dual Synchronous
800 mA/800 mA, Step-
Down DC/DC Regulator,
1.8V/1.575V Output Volt-
age, –40°C to +125°C,
12LD TDFN
Temperature
Range:
Y
=
–40C to +125C
Packages:
ML
TR
=
=
12-Lead, 3 mm × 3 mm TDFN
Tape and Reel; 5000/reel.
MIC2230-GSYML:
Dual Synchronous
800 mA/800 mA, Step-
Down DC/DC Regulator,
1.8V/3.3V Output Volt-
age, –40°C to
Media Type:
+125°C,12LD TDFN
e)
f)
MIC2230-J4YML:
MIC2230-S4YML:
MIC2230-SSYML:
Dual Synchronous 800
mA/800 mA, Step-Down
DC/DC Regulator, 2.5V/
1.2V Output Voltage,
–40°C to +125°C, 12LD
TDFN
Dual Synchronous 800
mA/800 mA, Step-Down
DC/DC Regulator, 3.3V/
1.2V Output Voltage,
–40°C to +125°C, 12LD
TDFN
g)
Dual Synchronous 800
mA/800 mA, Step-Down
DC/DC Regulator, 3.3V/
3.3V Output Voltage,
–40°C to +125°C, 12LD
TDFN
Note 1:
Tape and Reel identifier only appears in the
catalog part number description. This
identifier is used for ordering purposes and
is not printed on the device package. Check
with your Microchip Sales Office for package
availability with the Tape and Reel option.
2017 Microchip Technology Inc.
DS20005748A-page 23
MIC2230
NOTES:
DS20005748A-page 24
2017 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Trademarks
The Microchip name and logo, the Microchip logo, AnyRate,
Information contained in this publication regarding device
dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KeeLoq,
applications and the like is provided only for your convenience
KeeLoq logo, Kleer, LANCheck, LINK MD, MediaLB, MOST,
and may be superseded by updates. It is your responsibility to
MOST logo, MPLAB, OptoLyzer, PIC, PICSTART, PIC32 logo,
ensure that your application meets with your specifications.
RightTouch, SpyNIC, SST, SST Logo, SuperFlash and UNI/O
MICROCHIP MAKES NO REPRESENTATIONS OR
are registered trademarks of Microchip Technology
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
Incorporated in the U.S.A. and other countries.
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights unless otherwise stated.
ClockWorks, The Embedded Control Solutions Company,
ETHERSYNCH, Hyper Speed Control, HyperLight Load,
IntelliMOS, mTouch, Precision Edge, and QUIET-WIRE are
registered trademarks of Microchip Technology Incorporated
in the U.S.A.
Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut,
BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM,
dsPICDEM.net, Dynamic Average Matching, DAM, ECAN,
EtherGREEN, In-Circuit Serial Programming, ICSP, Inter-Chip
Connectivity, JitterBlocker, KleerNet, KleerNet logo, MiWi,
motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB,
MPLINK, MultiTRAK, NetDetach, Omniscient Code
Generation, PICDEM, PICDEM.net, PICkit, PICtail,
PureSilicon, RightTouch logo, REAL ICE, Ripple Blocker,
Serial Quad I/O, SQI, SuperSwitcher, SuperSwitcher II, Total
Endurance, TSHARC, USBCheck, VariSense, ViewSpan,
WiperLock, Wireless DNA, and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
Silicon Storage Technology is a registered trademark of
Microchip Technology Inc. in other countries.
GestIC is a registered trademarks of Microchip Technology
Germany II GmbH & Co. KG, a subsidiary of Microchip
Technology Inc., in other countries.
All other trademarks mentioned herein are property of their
respective companies.
© 2017, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
ISBN: 978-1-5224-1653-1
2017 Microchip Technology Inc.
DS20005748A-page 25
Worldwide Sales and Service
AMERICAS
ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
2355 West Chandler Blvd.
Chandler, AZ 85224-6199
Tel: 480-792-7200
Fax: 480-792-7277
Technical Support:
http://www.microchip.com/
support
Asia Pacific Office
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
Austria - Wels
Tel: 43-7242-2244-39
Fax: 43-7242-2244-393
Suites 3707-14, 37th Floor
Tower 6, The Gateway
Harbour City, Kowloon
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
Denmark - Copenhagen
Tel: 45-4450-2828
Fax: 45-4485-2829
Hong Kong
Tel: 852-2943-5100
Fax: 852-2401-3431
India - Bangalore
Tel: 91-80-3090-4444
Fax: 91-80-3090-4123
Finland - Espoo
Tel: 358-9-4520-820
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
Web Address:
www.microchip.com
France - Paris
Tel: 33-1-69-53-63-20
Fax: 33-1-69-30-90-79
India - New Delhi
Tel: 91-11-4160-8631
Fax: 91-11-4160-8632
Atlanta
Duluth, GA
Tel: 678-957-9614
Fax: 678-957-1455
China - Beijing
Tel: 86-10-8569-7000
Fax: 86-10-8528-2104
France - Saint Cloud
Tel: 33-1-30-60-70-00
India - Pune
Tel: 91-20-3019-1500
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Germany - Garching
Tel: 49-8931-9700
Germany - Haan
Austin, TX
Tel: 512-257-3370
Japan - Osaka
Tel: 81-6-6152-7160
Fax: 81-6-6152-9310
Boston
Tel: 49-2129-3766400
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Westborough, MA
Tel: 774-760-0087
Fax: 774-760-0088
Japan - Tokyo
Tel: 81-3-6880- 3770
Fax: 81-3-6880-3771
Germany - Heilbronn
Tel: 49-7131-67-3636
China - Dongguan
Tel: 86-769-8702-9880
Germany - Karlsruhe
Tel: 49-721-625370
Chicago
Itasca, IL
Tel: 630-285-0071
Fax: 630-285-0075
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
China - Guangzhou
Tel: 86-20-8755-8029
Germany - Munich
Tel: 49-89-627-144-0
Fax: 49-89-627-144-44
China - Hangzhou
Tel: 86-571-8792-8115
Fax: 86-571-8792-8116
Korea - Seoul
Dallas
Addison, TX
Tel: 972-818-7423
Fax: 972-818-2924
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
Germany - Rosenheim
Tel: 49-8031-354-560
China - Hong Kong SAR
Tel: 852-2943-5100
Fax: 852-2401-3431
Israel - Ra’anana
Tel: 972-9-744-7705
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
Detroit
Novi, MI
Tel: 248-848-4000
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
Houston, TX
Tel: 281-894-5983
Italy - Padova
Tel: 39-049-7625286
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Indianapolis
Noblesville, IN
Tel: 317-773-8323
Fax: 317-773-5453
Tel: 317-536-2380
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
China - Shanghai
Tel: 86-21-3326-8000
Fax: 86-21-3326-8021
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
Norway - Trondheim
Tel: 47-7289-7561
Los Angeles
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
Tel: 951-273-7800
Poland - Warsaw
Tel: 48-22-3325737
Taiwan - Hsin Chu
Tel: 886-3-5778-366
Fax: 886-3-5770-955
Romania - Bucharest
Tel: 40-21-407-87-50
China - Shenzhen
Tel: 86-755-8864-2200
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-213-7830
Raleigh, NC
Tel: 919-844-7510
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Taipei
Tel: 886-2-2508-8600
Fax: 886-2-2508-0102
New York, NY
Tel: 631-435-6000
Sweden - Gothenberg
Tel: 46-31-704-60-40
San Jose, CA
Tel: 408-735-9110
Tel: 408-436-4270
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Sweden - Stockholm
Tel: 46-8-5090-4654
Canada - Toronto
Tel: 905-695-1980
Fax: 905-695-2078
UK - Wokingham
Tel: 44-118-921-5800
Fax: 44-118-921-5820
DS20005748A-page 26
2017 Microchip Technology Inc.
11/07/16
相关型号：
MIC2230-GFHYMLTR
1.8 A SWITCHING REGULATOR, 2875 kHz SWITCHING FREQ-MAX, PDSO12, 3 X 3 MM, LEAD FREE, MLF-12
ROCHESTER
MIC2230-SSYMLTR
1.8A SWITCHING REGULATOR, 2875kHz SWITCHING FREQ-MAX, PDSO12, 3 X 3 MM, LEAD FREE, MLF-12
MICREL
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