MPM3805BGQB-12-AEC1-Z 数据手册
MPM3805B
6V, 0.6A, Synchronous Step-Down
Module Converter with Integrated
Inductor, AEC-Q100 Qualified
DESCRIPTION
FEATURES
The MPM3805B is an automotive-grade, stepdown module converter with a built-in inductor
and power MOSFETs. It achieves 0.6A of peak
output current from a 2.5V to 6V input voltage
range, with excellent load and line regulation.
The output voltage is fixed to 1.2V, so the device
only requires input and output capacitors to
complete the design.
The device’s integrated inductor simplifies the
power system design and provides easy, efficient
use. Constant-on-time (COT) control provides
fast transient response and eases loop
stabilization. Fault protections include cycle-bycycle current limiting and thermal shutdown
(TSD).
The MPM3805B is ideal for a wide range of
automotive applications, including small ECUs,
camera modules, telematics, and infotainment
systems. It is available in a small, surfacemounted
QFN-12
(2.5mmx3.0mmx0.9mm)
package.
Guaranteed Industrial/Automotive Temp
Wide 2.5V to 6V Operating Input Range
Fixed 1.2V Output
Up to 0.6A Peak Output Current
100% Duty Cycle in Dropout Mode
Forced Continuous Conduction Mode (CCM)
EN and Power Good for Power Sequencing
Cycle-by-Cycle Over-Current Protection
Short-Circuit Protection with Hiccup Mode
Only Requires Two External Ceramic
Capacitors
Total Solution Size of 6mmx3.8mm
Available in a QFN-12
(2.5mmx3.0mmx0.9mm) Package
Available in AEC-Q100 Grade 1
APPLICATIONS
Automotive ECUs
Rear Cameras
E-Calls
Telematics
Infotainment Systems
All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For
MPS green status, please visit the MPS website under Quality
Assurance. “MPS”, the MPS logo and “Simple, Easy Solutions” are registered
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
TYPICAL APPLICATION
Efficiency vs. Load Current
VOUT
OUT
VIN
IN
CIN
OUT_s
COUT
U1
10uF
10uF
MPM3805B-12
EN
EN
AGND
PGND
LOAD EFFICIENCY (%)
100
90
80
70
60
50
40
30
PG
PG
VIN =
VIN =
VIN =
VIN =
VIN =
2.5V
3.3V
4V
5V
6V
0.5
0.6
20
0.0
0.1
0.2
0.3
0.4
0.7
LOAD CURRENT (A)
MPM3805B Rev. 1.0
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12/9/2019
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1
MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
ORDERING INFORMATION
Part Number*
Package
Top Marking
MSL Rating
MPM3805BGQB-12-AEC1
QFN-12
(2.5mmx3.0mmx0.9mm)
See Below
3
* For Tape & Reel, add suffix –Z (e.g. MPM3805BGQB-12-AEC1–Z).
TOP MARKING
BJB: Product code of MPM3805BGQB-12-AEC1
Y: Year code
WW: Week code
LLL: Lot number
PACKAGE REFERENCE
OUT_S AGND NC
12
11
10
EN
9
PGND
1
8
PG
PGND
2
7
VIN
N/C
3
6
OUT
N/C
4
5
OUT
QFN-12 (2.5mmx3.0mmx0.9mm)
MPM3805B Rev. 1.0
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12/9/2019
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2
MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
PIN FUNCTIONS
Pin #
1, 2
3, 4
5, 6
7
8
9
10
11
12
Name
Description
Power ground.
Internal SW pad.
Output voltage power rail. Connect the load to OUT. An output capacitor is required.
Supply voltage. The MPM3805B operates from a 2.5V to 6V unregulated input voltage range.
VIN
A decoupling capacitor is required to prevent large voltage spikes from appearing at the input.
Place the decoupling capacitor as close to VIN as possible.
Power good indicator. The output of PG is an open drain with an internal pull-up resistor to
PG
VIN. PG is pulled up to VIN when the feedback voltage (VFB) is within 10% of the regulation
level. If VFB is out of the regulation range, PG is pulled low.
On/off control.
EN
No internal connection.
NC
AGND Analog ground for internal control circuit.
OUT_S Output voltage sense.
PGND
N/C
OUT
ABSOLUTE MAXIMUM RATINGS
(1)
Supply voltage (VIN) ....................................6.5V
All other pins ............................... -0.3V to +6.5V
Junction temperature ............................... 150°C
Lead temperature .................................... 260°C
Continuous power dissipation (TA = 25°C) (2)
……….….. .................................................1.9W
Storage temperature ................ -65°C to +150°C
ESD Rating
Human body model (HBM) .......................... 2kV
Charged device model (CDM)....................750V
Recommended Operating Conditions
Thermal Resistance (3)
θJA
θJC
QFN-12 (2.5mmx3.0mm)…..…65..…13…°C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD (MAX) = (TJ
(MAX) - TA) / θJA. Exceeding the maximum allowable power
dissipation produces an excessive die temperature, causing
the device to go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) Measured on JESD51-7, 4-layer PCB.
Supply voltage (VIN) .......................... 2.5V to 6V
Output voltage (VOUT) ..................................1.2V
Operating junction temp (TJ) .... -40°C to +125°C
MPM3805B Rev. 1.0
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3
MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
ELECTRICAL CHARACTERISTICS
VIN = 5V, TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TJ = 25°C.
Parameter
Input voltage
Output voltage accuracy
PFET switch on
resistance
NFET switch on
resistance
Inductor L value
Inductor DC resistance
Dropout resistance
Symbol Condition
VIN
2.5
6.0
V
1.23
IOUT = 10mA, VIN = 5V,
TJ = -40°C to +125°C
1.164
1.2
1.236
RDSON_P
100
230
mΩ
RDSON_N
60
130
mΩ
L
V
Inductance value at 1MHz
0.47
120
μH
mΩ
100% on duty
VEN = 0V, VIN = 6V, VSW = 0V and 6V,
TJ = 25°C
TJ = 25°C
TJ = -40°C to +125°C
220
mΩ
RDCR
RDR
tON
VIN = 3.6V
Soft-start time
Power good upper trip
threshold
Power good lower trip
threshold
Power good delay
Power good sink current
capability
Power good logic high
voltage
Power good internal pullup resistor
Units
1.200
VIN = 5V
Minimum off time
Max
1.17
PFET current limit
Switching frequency
Typ
IOUT = 10mA, TJ = 25°C, VIN = 5V
VOUT
Switch leakage
On time
Min
fSW
VIN = 3.6V
to 5V
TJ = 25°C
0
1
μA
1.6
1.5
2.1
2.6
2.7
A
50
70
100
TJ = -40°C to +125°C
TJ = 25°C
110
70
100
TJ = -40°C to +125°C
130
ns
140
TJ = 25°C
2.7
TJ = -40°C to +125°C
2.4
3.5
4.2
MHz
tMIN-OFF
60
ns
tSS-ON
1.5
ms
+10
%
PGL
-10
%
PGD
50
μs
PGH
FB voltage in respect to the regulation
VPG-L
Sink 1mA
VPG-H
VIN = 5V, VFB = 0.6V
RPG
0.4
4.9
V
V
550
MPM3805B Rev. 1.0
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kΩ
4
MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
ELECTRICAL CHARACTERISTICS (continued)
VIN = 5V, TJ = -40°C to +125°C, unless otherwise noted. Typical value are at TJ = 25°C.
Parameter
Symbol
Condition
Under-voltage lockout rising
threshold
Min
Typ
Max
Units
2.2
2.4
2.6
V
Under-voltage lockout
hysteresis threshold
300
EN input logic low voltage
EN input logic high voltage
EN input current
Supply current (shutdown)
Supply current (quiescent)
mV
0.4
1.2
VEN = 2V
VEN = 0V
VEN = 0V, TJ = 25°C
VEN = 0V, TJ = -40°C to +125°C
VEN = 2V, VFB = 0.63V,
VIN = 5V, TJ = 25°C
1.5
0.1
485
1
1
10
V
V
μA
μA
μA
560
μA
VEN = 2V,VFB = 0.63V, VIN = 5V,
TJ = -40°C to +125°C
580
Thermal shutdown (4)
150
°C
Thermal hysteresis (4)
30
°C
Note:
4) Not production tested, guaranteed by design.
MPM3805B Rev. 1.0
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MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 5V, VOUT = 1.2V, CIN = 10µF, COUT = 20µF, TA = 25°C, unless otherwise noted.
Line Efficiency
Efficiency vs. Load Current
IOUT = 0.3A
100
90
LINE EFFICIENCY (%)
LOAD EFFICIENCY (%)
100
80
70
60
50
40
30
VIN =
VIN =
VIN =
VIN =
VIN =
2.5V
3.3V
4V
5V
6V
0.5
0.6
20
90
80
70
60
50
0.0
0.1
0.2
0.3
0.4
0.7
2.5
3.2
3.9
4.6
5.3
INPUT VOLTAGE (V)
LOAD CURRENT (A)
Load Regulation
Line Regulation
1.2
LINE REGULATION (%)
LOAD REGULATION ( % )
1.5
0.9
0.6
0.3
0.0
-0.3
VIN =
VIN =
VIN =
VIN =
VIN =
-0.6
-0.9
-1.2
2.5V
3.3V
4V
5V
6V
-1.5
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
0.7
2.5
3.2
3.9
4.6
5.3
6.0
INPUT VOLTAGE (V)
LOAD CURRENT ( A )
Load Efficiency vs. Temperature
Line Efficiency
IOUT = 0.35A
IOUT = 0.45A
100
90
80
70
VIN =
VIN =
VIN =
VIN =
VIN =
60
2.7V
3.3V
4V
5V
6V
50
LINE EFFICIENCY ( % )
100
EFFICIENCY ( % )
6.0
90
80
70
60
TA =
TA =
TA =
TA =
TA =
TA =
-55°C
-20°C
20°C
55°C
85°C
115°C
3.5
4.0
50
-60 -40 -20
0
20
40
60
80 100 120
AMBIENT TEMPERATURE (°C)
2.5
3.0
4.5
5.0
5.5
6.0
INPUT VOLTAGE ( V )
MPM3805B Rev. 1.0
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12/9/2019
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MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, VOUT = 1.2V, CIN = 10µF, COUT = 20µF, TA = 25°C, unless otherwise noted.
Line Regulation
Load Regulation vs. Temperature
IOUT = 0.45A
IOUT = 0.35A
100
0.16
LOAD REGULATION ( % )
OUTPUT REGULATION ( % )
0.20
0.12
0.08
0.04
0.00
-0.04
TA =
TA =
TA =
TA =
TA =
TA =
-0.08
-0.12
-0.16
-55°C
-20°C
20°C
55°C
85°C
115°C
90
80
70
60
3.0
3.5
4.0
4.5
5.0
5.5
-60 -40 -20
6.0
20
40
60
80 100 120
Efficiency vs. Temperature
Line Efficiency vs. Temperature
IOUT = 0.35A
IOUT = 0.35A
100
90
90
80
70
VIN =
VIN =
VIN =
VIN =
VIN =
60
50
2.7V
3.3V
4V
5V
6V
EFFICIENCY ( % )
100
EFFICIENCY ( % )
0
AMBIENT TEMPERATURE (°C)
INPUT VOLTAGE ( V )
80
70
VIN =
VIN =
VIN =
VIN =
VIN =
60
2.7V
3.3V
4V
5V
6V
50
-60 -40 -20
-60 -40 -20 0 20 40 60 80 100 120
AMBIENT TEMPERATURE (°C)
0
20
40
60
80 100 120
AMBIENT TEMPERATURE (°C)
Switching Frequency vs.
Temperature
Enable Threshold Voltage vs.
Temperature
6.0
900
5.0
800
4.0
ENABLE THRESHOLD
VOLTAGE ( mV )
SWTICHING FREQUENCY
( MHz )
2.7V
3.3V
4V
5V
6V
50
-0.20
2.5
VIN =
VIN =
VIN =
VIN =
VIN =
700
3.0
600
2.0
500
VIN =
3.6V
1.0
0.0
-50 -30 -10 10
30
50
70
90 110 130
AMBIENT TEMPERATURE (°C)
Rising
Fulling
400
300
-50 -30 -10 10 30 50 70 90 110 130
AMBIENT TEMPERATURE (°C)
MPM3805B Rev. 1.0
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MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, VOUT = 1.2V, CIN = 10µF, COUT = 20µF, TA = 25°C, unless otherwise noted.
FB Voltage vs. Temperature
3.0
2.6
620
Rising
Fulling
FB VOLTAGE ( mV )
UVLO THRESHOLD VOLTAGE
(V )
UVLO Threshold Voltage vs.
Temperature
2.2
1.8
1.4
1.0
-50 -30 -10 10
30
50
70
615
610
605
600
VIN = 2.5V
595
VIN = 5V
590
90 110 130
-50 -30 -10 10 30 50 70 90 110 130
AMBIENT TEMPERATURE (°C)
AMBIENT TEMPERATURE (°C)
IQ Current vs. Temperature
Output Voltage vs. Temperature
700
IQ CURRENT ( μA )
650
600
550
500
450
400
VIN = 2.5V
350
VIN = 5V
OUTPUT VOLTAGE ( V )
1.8
300
-50 -30 -10 10
30
50
70
1.6
1.4
1.2
1.0
VIN = 2.5V
VIN = 5V
0.8
90 110 130
-50 -30 -10 10
AMBIENT TEMPERATURE (°C)
Shutdown Current vs. Temperature
70
90 110 130
0.6
SHUTDOWN CURRENT (μA)
SHUTDOWN CURRENT ( μA )
50
Shutdown Current vs. VIN
1.0
VIN = 3V
0.8
30
AMBIENT TEMPERATURE (°C)
VIN = 5V
0.6
0.4
0.2
0.5
0.4
0.3
0.2
0.1
0.0
0.0
-50 -30 -10 10
30
50
70
90 110 130
AMBIENT TEMPERATURE (°C)
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
INPUT VOLTAGE (V)
MPM3805B Rev. 1.0
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MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, VOUT = 1.2V, CIN = 10µF, COUT = 20µF, TA = 25°C, unless otherwise noted.
Start-Up
Shutdown
VIN = 2.5V, IOUT = 0.6A
VIN = 2.5V, IOUT = 0.6A
CH1: VIN
CH1: VIN
CH3: VOUT
CH3: VOUT
CH4: IOUT
CH4: IOUT
Start-Up
Shutdown
VIN = 6V, IOUT = 0.5A
VIN = 6V, IOUT = 0.5A
CH1: VIN
CH1: VIN
CH2: VPG
CH2: VPG
CH3: VOUT
CH3: VOUT
CH4: IOUT
CH4: IOUT
Enable On
Enable Off
VIN = 2.5V, IOUT = 0.6A
VIN = 2.5V, IOUT = 0.6A
CH1: VIN
CH1: VIN
CH2: VEN
CH2: VEN
CH3: VOUT
CH3: VOUT
CH4: IOUT
CH4: IOUT
MPM3805B Rev. 1.0
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12/9/2019
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MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, VOUT = 1.2V, CIN = 10µF, COUT = 20µF, TA = 25°C, unless otherwise noted.
Enable On
Enable Off
VIN = 6V, IOUT = 0.5A
VIN = 6V, IOUT = 0.5A
CH1: VEN
CH1: VEN
CH2: VPG
CH2: VPG
CH3: VOUT
CH3: VOUT
CH4: IOUT
CH4: IOUT
Steady State
Steady State
VIN = 5V, IOUT = 0.6A
VIN = 2.5V, IOUT = 0.6A
CH1: VIN
CH1: VIN
CH2: VPG
CH2: VPG
CH3: VOUT
CH3: VOUT
CH4: IOUT
CH4: IOUT
Short Circuit
Short-Circuit Recovery
VIN = 5V
VIN = 5V
CH1: VIN
CH1: VIN
CH3: VOUT
CH3: VOUT
CH4: IIN
CH4: IIN
MPM3805B Rev. 1.0
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MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, VOUT = 1.2V, CIN = 10µF, COUT = 20µF, TA = 25°C, unless otherwise noted.
Transient Response
Transient Response
VIN = 2.5V, IOUT = 0A to 0.6A, 0.25A/μs
VIN = 3.3V, IOUT = 0A to 0.6A, 0.25A/μs
CH1: VIN
CH1: VIN
CH3:
CH3:
VOUT/AC
VOUT/AC
CH4: IOUT
CH4: IOUT
Transient Response
VIN = 6V, IOUT = 0A to 0.6A, 0.25A/μs
CH1: VIN
CH3:
VOUT/AC
CH4: IOUT
MPM3805B Rev. 1.0
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MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
FUNCTIONAL BLOCK DIAGRAM
VIN
VTH
Voltage
Reference
EN
+
Soft Start
COMP
Low I Q
SW
0.6V
+
+
EA
ConstantOn-Time
Pulse
+
+
+FBCOMP
Low I Q
+
-
Low I Q
OUT_s
PDRV
RST
Ramp
Generator
EN
PWM
PWM
0.47uH
Driver
OUT
VOUT
R1
SW
Low I Q
Hi-Z
NDRV
R2
IN
+
0.66V
COMP
-
+
GND
AGND
COMP
-
+
COMP
-
PG
0.54V
Low IQ
MPM3805B
Figure 1: Functional Block Diagram
MPM3805B Rev. 1.0
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MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
OPERATION
The MPM3805B’s integrated inductor simplifies
the schematic and layout design. Only input and
output capacitors are required to complete the
design. The MPM3805B uses constant-on-time
(COT) control with input voltage feed forward to
stabilize the switching frequency over the full
input range. At light-load, the device employs
proprietary control of the low-side switch and
inductor current to improve efficiency. It is
available in a small, surface-mounted QFN-12
(2.5mmx3.0mmx0.9mm) package.
Constant-On-Time Control (COT)
Compared
to
fixed-frequency
pulse-width
modulation (PWM) control, constant-on-time control
(COT) offers a simpler control loop and faster
transient response. Using input voltage feed
forward, the MPM3805B maintains a nearly
constant switching frequency across the input and
output voltage range.
The on time of the switching pulse can be
estimated with Equation (1):
t ON
VOUT
0.28s
VIN
(1)
(PGOOD). When the feedback voltage (VFB) is
within ±10% of the regulation voltage (e.g. 0.6V),
PGOOD is pulled up to IN by the internal resistor.
If VFB is out of the ±10% window, PGOOD is
pulled down to ground by an internal MOSFET.
The MOSFET has a maximum RDS(ON) below
400Ω.
Current Limit
The MPM3805B has a typical 2.1A current limit
for the high-side switch. When the high-side
switch reaches the current limit, the MPM3805B
reaches the hiccup threshold until the current
decreases. This prevents the inductor current
from continuing to build, which could damage to
the components.
Short Circuit and Recovery
The MPM3805B enters short-circuit protection
(SCP) mode when the current limit is reached. It
tries to recover from the short circuit with hiccup
mode. When an SCP condition occurs, the
MPM3805B disables the output power stage,
discharges the soft-start capacitor, then
automatically tries to soft start again. If the shortcircuit condition remains after the soft start ends,
The MPM3805B repeats the cycle until the short
circuit disappears, and the output rises back to
the regulation level.
To prevent inductor current runaway during the
load transition, the MPM3805B fixes the minimum
off time to 60ns. However, this time limit does not
affect operation in a steady state.
The MPM3805B works in forced continuous
conduction mode (CCM).
Enable (EN)
If the input voltage exceeds the under-voltage
lockout (UVLO) threshold (typically 2.3V), the
MPM3805B is enabled by pulling EN above 1.2V.
Float EN floating or pull it to ground to disable the
MPM3805B. There is an internal 1MΩ resistor
from EN to ground.
Soft Start (SS)
The MPM3805B has a built-in soft start that
ramps up the output voltage in a controlled slew
rate. This avoids overshoot at start-up. The softstart time is about 1.5ms.
Power Good Indictor (PGOOD)
The MPM3805B has an open drain with a 550kΩ
pull-up resistor pin for the power good indicator
MPM3805B Rev. 1.0
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12/9/2019
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13
MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
APPLICATION INFORMATION
capacitors are recommended to maintain a low
output voltage ripple. The output voltage ripple
can be calculated with Equation (5):
COMPONENT SELECTION
Selecting the Input Capacitor
The step-down converter has a discontinuous
input current, and requires a capacitor to supply
the AC current while maintaining the DC input
voltage. For optimal performance, use low-ESR
capacitors. Ceramic capacitors with X5R or X7R
dielectrics are highly recommended due to their
low ESR and small temperature coefficients. For
most applications, a 10µF capacitor is sufficient.
For an output capacitor, a 22µF capacitor may be
needed to enhance system stability.
Since the input capacitor absorbs the input
switching current, it requires an adequate ripple
current rating. The RMS current in the input
capacitor can be estimated with Equation (2):
IC1 ILOAD
VOUT VOUT
1
VIN VIN
(2)
The worst-case condition occurs at VIN = 2VOUT,
calculated with Equation (3):
IC1
ILOAD
2
(3)
V
VOUT
1
1 OUT RESR
fSW L1
VIN
8 fS C2
(5)
Where L1 is the inductor value, and RESR is the
equivalent series resistance (ESR) value of the
output capacitor (L1 is 0.47µH).
When using ceramic capacitors, the capacitance
dominates impedance at the switching frequency,
and causes most of the output voltage ripple. For
simplification, the output voltage ripple can be
estimated with Equation (6):
ΔVOUT
V
VOUT
1 OUT
2
8 fSW L1 C2
VIN
(6)
When using tantalum or electrolytic capacitors,
the ESR dominates the impedance at the
switching frequency. For simplification, the output
ripple can be calculated with Equation (7):
ΔVOUT
VOUT
V
1 OUT
fSW L1
VIN
RESR
(7)
For simplification, choose an input capacitor that
has an RMS current rating greater than half of
the maximum load current.
The input capacitor can be electrolytic, tantalum
or ceramic. When using electrolytic or tantalum
capacitors, add a small, high-quality ceramic
capacitor (e.g. 0.1μF) as close to the IC as
possible. When using ceramic capacitors, ensure
that they have enough capacitance to provide
sufficient charge to prevent an excessive voltage
ripple at the input. The input voltage ripple
caused by capacitance can be estimated with
Equation (4):
V
ILOAD
V
OUT 1 OUT
fSW C1 VIN
VIN
VOUT
The characteristics of the output capacitor affect
the stability of the regulation system.
PCB Layout Guidelines
Efficient PCB layout is critical for stable
operation. The device’s integrated inductor
simplifies the schematic and layout design. Input
and output capacitors are required to complete
the design. For the best results, refer to Figure 3
and Figure 4 and follow the guidelines below:
1. Place the high-current paths (PGND, IN and
OUT) close to the device with short, direct,
and wide traces.
(4)
2. Place the input capacitor as close to IN and
PGND as possible.
Selecting the Output Capacitor
The output capacitor (COUT) is required to
maintain the DC output voltage. Ceramic
capacitors are recommended. Low-ESR
3. Keep the switching node away from the
feedback network.
VIN
For additional device applications, refer to the
related evaluation board datasheets.
MPM3805B Rev. 1.0
www.MonolithicPower.com
12/9/2019
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14
MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
VIN
EN
AGND
OUT_S
GND
GND
GND
PGND
PG
PGND
VIN
N/C
NC
OUT
NC
N/C
OUT
GND
OUT
Figure 2: Top View of PCB Layout
GND
VIN
EN
OUT
PG
GND
GND
VIN
OUT
Figure 3: Bottom View of PCB Layout
MPM3805B Rev. 1.0
www.MonolithicPower.com
12/9/2019
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15
MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
TYPICAL APPLICATION CIRCUIT
IN
VIN
CIN
10µF
U1
MPM3805B-12
OUT
OUT_s
VOUT
COUT
10µF
PG
PG
EN
EN
AGND
PGND
Figure 4: Typical Application Circuit
MPM3805B Rev. 1.0
www.MonolithicPower.com
12/9/2019
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© 2019 MPS. All Rights Reserved.
16
MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
PACKAGE INFORMATION
QFN-12 (2.5mmx3.0mmx0.9mm)
MPM3805B Rev. 1.0
www.MonolithicPower.com
12/9/2019
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© 2019 MPS. All Rights Reserved.
17
MPM3805B – 0.6A PEAK SIMPLE MODULE W/INTEGRATED INDUCTOR
CARRIER INFORMATION
Part Number
Package Description
Quantity
/Reel
Quantity
/Tube
Reel
Diameter
Carrier
Tape
Width
Carrier
Tape
Pitch
MPM3805BGQB-12-AEC1-Z
QFN-12
(2.5mmx3.0mmx0.9mm)
5000
N/A
13in
12mm
8mm
Notice: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should
warrant and guarantee that third-party Intellectual Property rights are not infringed upon when integrating MPS products into any application.
MPS will not assume any legal responsibility for any said applications.
MPM3805B Rev. 1.0
www.MonolithicPower.com
12/9/2019
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© 2019 MPS. All Rights Reserved.
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