APE1803A consists of step-down switching regulator with PWM control

 

APE1803A

Manufacturer Part NumberAPE1803A
Description        APE1803A consists of step-down switching regulator with PWM control
ManufacturerAdvanced Power Electronics Corp.
APE1803A datasheets

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Specifications of APE1803A

Vin(min)3.6Vin(max)20
Vout(min)0.8Vout(max)20
Iout(max)3Frequency330Khz
Scp?PackageSOP8
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Advanced Power
Electronics Corp.
FEATURES
Input Voltage : 3.6V to 20V
Output Voltage : 0.8V to VCC
Duty Ratio : 0% to 100% PWM Control
Oscillation Frequency : 330KHz Typ.
Soft-Start(SS), Current Limit(CL), Enable Function
Thermal Shutdown Function
Short Circuit Protect(SCP)
Built-in Internal SW P-channel MOS
Low ESR Output Capacitor (Multi-layer Chip
Capacitor (MLCC)) Application.
SO-8 Pb-Free Package.
TYPICAL APPLICATION
1. MLCC
VCC+12V
R4
ON/OFF
100K
C2
C3
22uF
0.1uF
C6
0.1uF
option
Compensation Capacitor Selection(MLCC)
VIN
12V
5V
Data and specifications subject to change without notice
PWM CONTROL 3A STEP-DOWN CONVERTER
DESCRIPTION
APE1803A consists of step-down switching regulator with
PWM control. These devise include a reference voltage
source, oscillation circuit, error amplifier, internal PMOS and
etc.
APE1803A provides low-ripple power, high efficiency, and
excellent transient characteristics. The PWM control circuit is
able to the duty ratio linearly form 0 up to 100%. This converter
also contains an error amplifier circuit as well as a soft-start
circuit that prevents overshoot at startup. An enable function,
an over current protect function and short circuit protect
function are built inside, and when OCP or SCP happens, the
operation frequency will be reduced. Also, an internal
compensation block is built in to minimum external component
count.
With the addition of an internal P-channel Power MOS, a
coil, capacitors, and a diode connected externally, these ICs
can function as step-down switching regulators. They serve as
ideal power supply units for portable devices when coupled
with the SO-8 package, providing such outstanding features as
low
current
accommodate an input voltage up to 23V, it is also suitable for
the operation via an AC adapter.
FB
VSS
L1
EN
VSS
15uH
1
COMP
SW
D1
VCC
SW
B340
APE1803A
R3
C7
680pF
4k
R1
VOUT = VFB x
(
1 +
)
R2
VFB = 0.8 V ; R1 suggest 10K ~ 50K
V
L1
R3
OUT
5.0/3.3/2.5V
15uH
4K
3.3/2.5V
15uH
6.8K
APE1803A
consumption.
Since
this
VOUT=5V3A
2
R1
C1
39K
1nF
C4
C8
22uF
0.1uF
R2
7.5K
C7
C1
680pF
1nF
330pF
1nF
converter
can
1
201201317

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APE1803A Summary of contents

  • Page 1

    ... Data and specifications subject to change without notice PWM CONTROL 3A STEP-DOWN CONVERTER DESCRIPTION APE1803A consists of step-down switching regulator with PWM control. These devise include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc. APE1803A provides low-ripple power, high efficiency, and excellent transient characteristics ...

  • Page 2

    ... TYPICAL APPLICATION 2. EL CAP VCC+12V R4 ON/OFF 100K C2 C3 470uF 0.1uF C6 0.1uF option Compensation Capacitor Selection(EL CAP) VIN 5-20V 5/3.3/2.5/1.8V ORDERING / PACKAGE INFORMATION APE1803A X Package Type M : SO-8 ABSOLUTE MAXIMUM RATINGS V PIN Voltage(V ) ---------------------------------------------- Feedback PIN Voltage(V ) -------------------------------------- V FB ON/OFF PIN Voltage(V ) ---------------------------------------- V EN Switch PIN Voltage(V ) ------------------------------------------ V SW ...

  • Page 3

    ... EFFI OUT T SD PIN DESCRIPTION GND Pin Feedback Pin Power -Off Pin H : Normal Operation(Step-down Step-down Operation Stopped (All circuits deactivated) Compensation Pin Switch Pin. Connect External Inductor & Diode here. IC Power Supply Pin APE1803A MIN TYP 0.784 0 0 =0.2A - 0.6 - 0.2 260 ...

  • Page 4

    ... PWM CONTROL The APE1803A consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of the APE1803A, the pulse width varies in a range from 0 to 100%, according to the load current. The ripple voltage produced by the switching can easily be removed through a filter because the switching frequency remains constant. Therefore, these converters provide a low-ripple power over broad ranges of input voltage and load current ...

  • Page 5

    ... CAP) A 22µF MLCC capacitor for most applications is sufficient. Note: MLCC do not support when V is smaller than 2.5V. OUT ( ) × − OUT IN OUT L ∆ × × OSC =0.4A. The DC current rating of the inductor should 0.4A x 110mΩ= 44mV APE1803A 5 ...

  • Page 6

    ... P (Power Dissipation), The dual SW pins (5 and 6) and j D pin as closely as possible to get good power filter effect. SS Use through hole to conduct the heat into the backside of PCB layer. The heat sink copper of PCB area should be solder-painted without masked. APE1803A 6 ...

  • Page 7

    ... Vin(V) VFB vs temperature 0.815 0.810 0.805 0.800 0.795 0.790 0.785 - Temp ( ℃ 100 120 APE1803A ICCQ VS VIN 6.0 5.0 4.0 3.0 2.0 1.0 0 Vin(V) Fosc vs Temperature 350.0 340.0 330.0 320.0 310.0 300.0 290.0 ...

  • Page 8

    ... OUT OUT Efficiency (V =12V, V =5V) IN OUT VOUT=5V 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 0.0 0.5 1.0 1.5 Iout(A) =3A) OUT =0.1~3A) 2.0 2.5 3.0 APE1803A Power on Test Wave (V =12V, V =5V OUT OUT EN on Test Wave (V =12V, V =5V OUT OUT Efficiency (V =3.3V) OUT VOUT=3.3V 100% 90% 80% 70% 60% 50% VIN=12V 40% VIN=5.0V 30% ...

  • Page 9

    ... I IN OUT OUT Efficiency (V =12V, V =5V) IN OUT VOUT=5V 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 0.0 1.0 Iout(A) =3A) =0.1~3A) 2.0 3.0 APE1803A Power on Test Wave (V =12V, V =5V OUT OUT EN on Test Wave (V =12V, V =5V OUT OUT Efficiency (V =12V, V =3.3V) IN OUT VOUT=3.3V 100% 90% 80% 70% 60% ...

  • Page 10

    ... Advanced Power Electronics Corp. MARKING INFORMATION SO-8 1803AM YWWSSS Part Number Package Code Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence APE1803A 10 ...

  • Page 11

    ... O θ Mold flash shall not exceed 0.25mm per side JEDEC outline: MS-012 Nom. Max. - 1. 0.2 0.25 4.9 5.1 3.9 4.1 6 6.2 - 1.27 0.41 0.51 1.27 BSC - 0 APE1803A θ L DETAIL A DETAIL A Dimensions in Inches Min. Nom. Max 0.069 0.04 - 0.1 0.049 - - 0.0075 0.008 0.01 0.185 0.193 0.2 0.146 0.154 0.161 0.228 0.236 0.244 0.015 - 0.05 0.012 ...

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