ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
FEATURES
•
•
•
•
•
•
•
•
•
•
•
APPLICATIONS
40 V Input Voltage Surge
36 V Steady State Operation
Up to 3.5 A output current
Output Voltage up to 12 V
125 kHz Switching Frequency Eases EMI Design
91% Efficiency (VOUT = 5 V@2.4 A at VIN = 12 V)
Stable with Low-ESR Ceramic Capacitors to Allow
Low-Profile Designs
Integrated Over Voltage Protection
Excellent EMI Performance
Patented ActiveCC Sensorless Constant Current
Control Improves Efficiency and Lowers Cost.
Resistor Programmable
− Current Limit from 1.5 A to 4.0 A
− Patented Cable Compensation from 0 to 0.25 Ω
• ±7.5% CC Accuracy
− Compensation of Input /Output Voltage Change
− Temperature Compensation
− Independent of inductance and Inductor DCR
• 2% Feedback Voltage Accuracy
• Advanced Feature Set
− Integrated Soft Start
− Thermal Shutdown
• Car Charger/ Adaptor
• Rechargeable Portable Device
• CV/CC regulation DC/DC converter
GENERAL DESCRIPTION
ACT4533A/B is a wide input voltage, high efficiency
ActiveCC step-down DC/DC converter that operates
in either CV (Constant Output Voltage) mode or
CC (Constant Output Current) mode. ACT4533A/B
provides up to 3.5 A output current at 125 kHz
switching frequency.
ActiveCC is a patented control scheme to achieve highaccuracy sensorless constant current control. ActiveCC
eliminates the expensive, high accuracy current sense
resistor, making it ideal for CLA applications.
ACT4533A/B integrates adaptive gate drive to
achieve
excellent
EMI
performance
passing
EN55022 Class B EMC standard without adding
additional EMI components while maintaining high
conversion efficiency.
Protection features include cycle-by-cycle current limit,
thermal shutdown, and frequency foldback at short circuit. The devices are available in a SOP-8EP package
and require very few external devices for operation.
The only difference between ACT4533A and
ACT4533B is that Pin 7 provides OVP for ACT4533A
and EN/OVP for ACT4533B.
− Secondary Cycle-by-Cycle Current Limit
− Protection Against Shorted ISET Pin
• SOP-8EP Package
Data Sheet Rev. A, September 2019 | Subject to change without notice
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
ORDERING INFORMATION
PART NUMBER
OPERATION AMBIENT
TEMPERATURE RANGE
OVP/EN PIN
PACKAGE
PINS
PACKING
ACT4533AYH-T
-40 °C to 85 °C
OVP
SOP-8EP
8
TAPE & REEL
ACT4533BYH-T
-40 °C to 85 °C
OVP/EN
SOP-8EP
8
TAPE & REEL
PIN CONFIGURATION
PIN DESCRIPTIONS
PIN
NAME
DESCRIPTION
1
HSB
2
IN
3
SW
4
GND
Ground. Connect this pin to a large PCB copper area for best heat dissipation. Return FB, COMP, and
ISET to this GND, and connect this GND to power GND at a single point for best noise immunity.
5
FB
Feedback Input. The voltage at this pin is regulated to 0.808 V. Connect to the resistor divider between
output and GND to set the output voltage.
6
COMP
High Side Bias Pin. This provides power to the internal high-side MOSFET gate driver. Connect a
22 nF capacitor from HSB pin to SW pin.
Power Supply Input. Bypass this pin with a 10 µF ceramic capacitor to GND, placed as close to the
IC as possible.
Power Switching Output to External Inductor.
Error Amplifier Output. This pin is used to compensate the converter.
ACT4533A: OVP input. If the voltage at this pin exceeds 0.8 V, the IC shuts down high-side switch.
There is a 4 µA pull-up current at this pin.
7
EN/OVP
8
ISET
ACT4533B: EN/OVP input. If the voltage at this pin is below 0.65 V, the IC remains shut-off, if the
Voltage at this pin exceeds 2.26 V, the IC shuts down high side switch. There is a 4 µA pull-up current
at this pin.
Output Current Setting Pin. Connect a resistor from ISET to GND to program the output current.
Heat Dissipation Pad. Connect this exposed pad to large ground copper area with copper and vias.
Exposed Pad
Data Sheet Rev. A, September 2019 | Subject to change without notice
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE
UNIT
IN to GND
-0.3 to 40
V
SW to GND
-1 to VIN +1
V
HSB to GND
VSW - 0.3 to VSW +7
V
-0.3 to +6
V
46
°C/W
Operating Junction Temperature
-40 to 150
°C
Storage Junction Temperature
-55 to 150
°C
300
°C
FB, ISET, COMP to GND
Junction to Ambient Thermal Resistance
Lead Temperature (Soldering 10 sec.)
: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect
device reliability.
Data Sheet Rev. A, September 2019 | Subject to change without notice
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
ELECTRICAL CHARACTERISTICS
(VIN = 12 V, TA = 25 °C, unless otherwise specified.)
PARAMETER
TEST CONDITIONS
Input Voltage
MIN
TYP
10
Input Voltage Surge
38
V
40
V
9.7
V
Input Voltage Rising
VIN UVLO Hysteresis
Input Voltage Falling
1.1
Standby Supply Current
VFB = 1 V
0.9
1.4
mA
808
824
mV
792
Internal Soft-Start time
Error Amplifier Transconductance
VFB = VCOMP = 0.808 V,
∆ICOMP = ± 10 µA
Error Amplifier DC Gain
9.4
UNIT
VIN UVLO Turn - On Voltage
Feedback Voltage
9.0
MAX
V
400
µs
650
µA/V
4000
V/V
Switching Frequency
VFB = 0.808 V
125
kHz
Foldback Switching Frequency
VFB = 0 V
18
kHz
Maximum Duty Cycle
86
%
Minimum On - Time
290
ns
COMP to Current Limit Transconductance
VCOMP = 1.2 V
5.1
A/V
Secondary Cycle-by-Cycle Current Limit
Duty = 0.5
6.8
A
Slope Compensation
Duty = DMAX
3.2
A
1.0
V
ISET Voltage
ISET to IOUT DC Room Temp Current Gain
IOUT/ISET, RISET = 7.87 kΩ
20000
A/A
CC Controller DC Accuracy
RISET = 7.87 kΩ, VOUT = 4.0 V
2650
mA
OVP Pin Voltage (ACT4533A)
OVP Pin Voltage Rising
0.8
V
OVP Pin Voltage (ACT4533A)
OVP Pin Voltage Falling
0.57
V
OVP Pin Voltage (ACT4533B)
OVP Pin Voltage Rising
2.26
V
OVP Pin Voltage (ACT4533B)
OVP Pin Voltage Falling
1.76
V
EN Pin Voltage (ACT4533B)
EN Pin Voltage Rising
0.65
V
EN Pin Voltage (ACT4533B)
EN Pin Voltage Falling
0.59
V
85
mΩ
High - Side Switch ON - Resistance
Thermal Shutdown Temperature
Temperature Rising
155
°C
Thermal Shutdown Temperature Hysteresis
Temperature Falling
25
°C
Data Sheet Rev. A, September 2019 | Subject to change without notice
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
FUNCTIONAL BLOCK DIAGRAM FOR ACT4533A
FUNCTIONAL BLOCK DIAGRAM FOR ACT4533B
higher than the COMP voltage, the output of the PWM
Comparator goes high. When this happens or when
Oscillator clock output goes low, the High-Side Power
Switch turns off.
FUNCTIONAL DESCRIPTION
CV/CC Loop Regulation
As seen in Functional Block Diagram, the ACT4533A/B
is a peak current mode pulse width modulation (PWM)
converter with CC and CV control. The converter
operates as follows:
A switching cycle starts when the rising edge of the
Oscillator clock output causes the High-Side Power
Switch to turn on and the Low-Side Power Switch to turn
off. With the SW side of the inductor now connected to
IN, the inductor current ramps up to store energy in the
magnetic field. The inductor current level is measured
by the Current Sense Amplifier and added to the
Oscillator ramp signal. If the resulting summation is
Data Sheet Rev. A, September 2019 | Subject to change without notice
At this point, the SW side of the inductor swings to a
diode voltage below ground, causing the inductor
current to decrease and magnetic energy to be
transferred to output. This state continues until the cycle
starts again. The High-Side Power Switch is
FUNCTIONAL DESCRIPTION
driven by logic using HSB as the positive rail. This pin
is charged to VSW +5 V when the Low-Side Power
Switch turns on. The COMP voltage is the integration of
the error between FB input and the internal 0.808 V
5 of 18
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
reference. If FB is lower than the reference voltage,
COMP tends to go higher to increase current to the
output. Output current will increase until it reaches the
CC limit set by the ISET resistor. At this point, the device
will transition from regulating output voltage to
regulating output current, and the output voltage will
drop with increasing load.
The Oscillator normally switches at 125 kHz. However,
if FB voltage is less than 0.6 V, then the switching
frequency decreases until it reaches a typical value of
18 kHz at VFB = 0.15 V
Over Voltage Protection (ACT4533A)
The ACT4533A has an OVP pin. If the voltage at this
pin exceeds 0.8 V, the IC shuts down high-side switch.
There is a 4 µA pull-up current at this pin.
EN/OVP Pin (ACT4533B)
The ACT4533B has an enable input and OVP input for
turning the IC on and off.
If the voltage at this pin rises above 0.65 V, the IC is
enabled. The EN contains a 60 mV hysteresis and 4 µA
pull-up current source.
If the voltage at this pin is between 0.65 V and 2.26 V,
the IC operates normally; if the voltage at this pin
exceeds 2.26 V, the IC shuts down high-side switch.
The OVP contains a 500 mV hysteresis and 4 µA
pull-up current source.
Thermal Shutdown
The ACT4533A/B disables switching when its junction
temperature exceeds 155 °C and resumes when the
temperature has dropped by 25 °C.
Data Sheet Rev. A, September 2019 | Subject to change without notice
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
CC Current Line Compensation
APPLICATIONS INFORMATION
When operating at constant current mode, the current
limit increase slightly with input voltage. For wide input
voltage applications, a resistor RC may be added
to compensate line change and keep output high CC
accuracy, as shown in Figure 3.
Output Voltage Setting
Figure 1:
Output Voltage Setting
Figure 3:
Input Line Compensation
Figure 1 shows the connections for setting the output
voltage. Select the proper ratio of the two feedback
resistors RFB1 and RFB2 based on the output voltage.
Adding a capacitor in parallel with RFB1 helps the system
stability. Typically, use RFB2
10 kΩ and determine
RFB1 from the following equation:
≈
0.808
1
(1)
CC Current Setting
ACT4533A/B constant current value is set by a resistor
connected between the ISET pin and GND. The CC
output current is linearly proportional to the current
flowing out of the ISET pin. The voltage at ISET is roughly
1.1 V and the current gain from ISET to output is roughly
21000 (21 mA/1 µA). To determine the proper resistor
for a desired current, please refer to Figure 2 below.
Figure 2:
Curve for Programming Output CC Current
Inductor Selection
The inductor maintains a continuous current to the
output load. This inductor current has a ripple that is
dependent on the inductance value:
Higher inductance reduces the peak-to-peak ripple
current. The trade-off for high inductance value is
the increase in inductor core size and series resistance,
and the reduction in current handling capability. In
general, select an inductance value L based on ripple
current requirement:
!
"# $$
(2)
%
where VIN is the input voltage, VOUT is the output voltage,
fSW is the switching frequency, ILOADMAX is the maximum
load current, and KRIPPLE is the ripple factor. Typically,
choose KRIPPLE = 30% to correspond to the peak-to-peak
ripple current being 30% of the maximum load current.
With a selected inductor value the peak-to-peak
inductor current is estimated as:
$&'$&
(3)
The peak inductor current is estimated as:
$&
!
(
1
2
$&'$&
(4)
The selected inductor should not saturate at ILPK.
The maximum output current is calculated as:
!
Data Sheet Rev. A, September 2019 | Subject to change without notice
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© 2020 Qorvo US, Inc. All rights reserved.
1
2
$&'$&
(5)
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
LLIM is the internal current limit, which is typically 4.5 A,
as shown in Electrical Characteristics Table.
External High Voltage Bias Diode
It is recommended that an external High Voltage Bias
diode be added when the system has a 5 V fixed input
or the power supply generates a 5 V output. This helps
improve the efficiency of the regulator. The High
Voltage Bias diode can be a low cost one such as
IN4148 or BAT54.
Figure 4:
not contribute to the ripple. Therefore, a lower
capacitance value can be used for ceramic type. In the
case of tantalum or electrolytic capacitors, the ripple
is dominated by RESR multiplied by the ripple current. In
that case, the output capacitor is chosen to have
sufficiently low ESR.
For ceramic output capacitor, typically choose a
capacitance of about 22 µF. For tantalum or electrolytic
capacitors, choose a capacitor with less than
50 mΩ ESR.
Rectifier Diode
External High Voltage Bias Diode
Use a Schottky diode as the rectifier to conduct current
when the High-Side Power Switch is off. The Schottky
diode must have current rating higher than the
maximum output current and a reverse voltage rating
higher than the maximum input voltage.
STABILITY COMPENSATION
Figure 5:
Stability Compensation
This diode is also recommended for high duty cycle
operation and high output voltage applications.
Input Capacitor
The input capacitor needs to be carefully selected to
maintain sufficiently low ripple at the supply input of the
converter. A low ESR capacitor is highly recommended.
Since large current flows in and out of this capacitor
during switching, its ESR also affects efficiency.
The input capacitance needs to be higher than 10 µF.
The best choice is the ceramic type, however, low ESR
tantalum or electrolytic types may also be used provided
that the RMS ripple current rating is higher than 50%
of the output current. The input capacitor should be
placed close to the IN and G pins of the IC, with the
shortest traces possible. In the case of tantalum or
electrolytic types, they can be further away if a small
parallel 0.1 µF ceramic capacitor is placed right next to
the IC.
: CCOMP2 is needed only for high ESR output capacitor
The feedback loop of the IC is stabilized by the
components at the COMP pin, as shown in Figure 5.
The DC loop gain of the system is determined by the
following equation:
23
Output Capacitor
# $$ %
$&'$&
% #
( *×+
)
0.808
23% 4.
(7)
$
=
4%
25 23% 6.
(8)
$
The second pole P2 is the output pole:
$
,- × ./01
=
The dominant pole P1 is due to CCOMP:
$
The output capacitor also needs to have low ESR to
keep low output voltage ripple. The output ripple voltage
is:
.
=
25
(9)
6
(6)
The first zero Z1 is due to RCOMP and CCOMP:
Where IOUTMAX is the maximum output current, KRIPPLE is
the ripple factor, RESR is the ESR of the output capacitor,
fSW is the switching frequency, L is the inductor value,
and COUT is the output capacitance. In the case of
ceramic output capacitors, RESR is very small and does
Data Sheet Rev. A, September 2019 | Subject to change without notice
7
=
1
25
8 of 18
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.
$
6.
(10)
$
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
And finally, the third pole is due to RCOMP and CCOMP2
(if CCOMP2 is used):
$8
=
25
.
1
$
6.
Table 1:
Typical Compensation for Different Output Voltages
and Output Capacitors
(11)
$
The following steps should be used to compensate
the IC:
STEP 1. Set the cross over frequency at 1/10 of the
switching frequency via RCOMP:
.
$
25
6
=
10 4% 4. $
5.12 : 10;
6
0.808
(12)
<
STEP 2. Set the zero fZ1 at 1/4 of the cross over
frequency. If RCOMP is less than 15 kΩ, the equation for
CCOMP is:
6.
$
=
2.83
.
10'>
$
?
(13)
If RCOMP is limited to 15 kΩ, then the actual cross over
frequency is 6.58 / (VOUTCOUT). Therefore:
6.
$
= 6.45
10'B
6
?
(14)
STEP 3. If the output capacitor’s ESR is high enough to
cause a zero at lower than 4 times the cross over
frequency, an additional compensation capacitor
CCOMP2 is required. The condition for using CCOMP2 is:
C DEF G
% #.
1.77 10'B
, 0.006
6
J
<
(15)
And the proper value for CCOMP2 is:
6.
$
=
6
.
% #.
$
VOUT
COUT
RCOMP
VCOMP CCOMP2
2.5 V
47 μF Ceramic CAP
5.6 kΩ
10 nF
3.3 V
47 μF Ceramic CAP
8.2 kΩ
10 nF
None
5V
47 μF Ceramic CAP
15 kΩ
10 nF
None
2.5 V
220 μF/10 V/30 mΩ
15 kΩ
2.2 nF
47 pF
3.3 V
220 μF/10 V/30 mΩ
15 kΩ
2.2 nF
47 pF
5V
220 μF/10 V/30 mΩ
15 kΩ
2.2 nF
47 pF
None
: CCOMP2 is needed for high ESR output capacitor.
CCOMP2 ≤ 47 pF is recommended.
CC Loop Stability
The constant-current control loop is internally
compensated over the 1500 mA - 3500 mA output range.
No additional external compensation is required to
stabilize the CC current.
Output Cable Resistance Compensation
To compensate for resistive voltage drop across the
charger's output cable, the ACT4533A/B integrates a
simple, user-programmable cable voltage drop
compensation using the impedance at the FB pin. Use
the curve in Figure 6 to choose the proper feedback
resistance values for cable compensation. RFB1 is the
high side resistor of voltage divider.
In the case of high RFB1 used, the frequency compensation needs to be adjusted correspondingly. As show in
Figure 7, adding a capacitor in paralleled with RFB1 or
increasing the compensation capacitance at COMP pin
helps the system stability.
Figure 6:
(16)
Cable Compensation at Various Resistor
Divider Values
Though CCOMP2 is unnecessary when the output
capacitor has sufficiently low ESR, a small value CCOMP2
such as 100 pF may improve stability against PCB
layout parasitic effects.
Table 1 shows some calculated results based on the
compensation method above.
Data Sheet Rev. A, September 2019 | Subject to change without notice
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
Figure 7:
Figure 8 shows an example of PCB layout.
Frequency Compensation for High RFB1
PC Board Layout Guidance
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of
the IC.
1. Arrange the power components to reduce the AC
loop size consisting of CIN, IN pin, SW pin and the
Schottky diode.
2. Place input decoupling ceramic capacitor CIN as
close to IN pin as possible. CIN is connected power
GND with vias or short and wide path.
3. Return FB, COMP and ISET to signal GND pin, and
connect the signal GND to power GND at a single
point for best noise immunity. Connect exposed pad
to power ground copper area with copper and vias.
4. Use copper plane for power GND for best heat dissipation and noise immunity.
Figure 8: PCB Layout
Figure 9 gives one typical car charger application schematic and associated BOM list.
5. Place feedback resistor close to FB pin.
6. Use short trace connecting HSB-CHSB-SW loop.
Data Sheet Rev. A, September 2019 | Subject to change without notice
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
Figure 9:
Typical Application Circuit for 5 V/2.4 A Car Charger with OVP Circuit
Table 2:
BOM List for 5 V/2.4 A Car Charger
ITEM
REFERENCE
DESCRIPTION
1
U1
IC, ACT4533AYH, SOP-8EP
Active-Semi
1
2
C1
Capacitor, Electrolytic, 47 µF/50 V, 6.3 x 7 mm
Murata, TDK
1
3
C2
Capacitor, Ceramic, 10 µF/50 V, 1206, SMD
Murata, TDK
1
4
C3
Capacitor, Ceramic, 2.2 nF/6.3 V, 0603, SMD
Murata, TDK
1
5
C4
Capacitor, Ceramic, 22 nF/50 V, 1206, SMD
Murata, TDK
1
6
C5
Capacitor, Ceramic, 1 nF/10 V, 0603, SMD
Murata, TDK
1
7
C6
Capacitor, Ceramic, 10 µF/10 V, 0603, SMD
Murata, TDK
1
8
C7
Capacitor, Electrolytic, 220 uF/10 V, 6.3 х 7 mm
Murata, TDK
1
9
L1
Inductor, 40 µH, 5 A, 20%, SMD
Tyco Electronics
1
10
D1
Diode, Schottky, 40 V/5 A, SK54BL
Diodes
1
11
R1
Chip Resistor, 7.87 kΩ, 0603, 1%
Murata, TDK
1
12
R2
Chip Resistor, 51 kΩ, 0603, 1%
Murata, TDK
1
13
R3
Chip Resistor, 15 kΩ, 0603, 5%
Murata, TDK
1
14
R4
Chip Resistor, 9.76 kΩ, 0603, 1%
Murata, TDK
1
15
R5
Chip Resistor, 100 kΩ, 0603, 1%
Murata, TDK
1
16
R6
Chip Resistor, 15 kΩ, 0603, 1%
Murata, TDK
1
Data Sheet Rev. A, September 2019 | Subject to change without notice
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MANUFACTURER
QTY
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
Figure 10:
Typical Application Circuit for 5 V/2.4 A Car Charger with OVP and Short Circuit Protection
Table 3:
BOM List for 2.4 A Car Charger
ITEM
REFERENCE
DESCRIPTION
MANUFACTURER
QTY
1
U1
IC, ACT4533BYH, SOP-8EP
Active-Semi
1
2
C1
Capacitor, Electrolytic, 47 µF/50 V, 6.3 x 7 mm
Murata, TDK
1
3
C2
Capacitor, Ceramic, 10 µF/50 V, 1206, SMD
Murata, TDK
1
4
C3
Capacitor, Ceramic, 2.2 nF/6.3 V, 0603, SMD
Murata, TDK
1
5
C4
Capacitor, Ceramic, 22 nF/50 V, 1206, SMD
Murata, TDK
1
6
C5
Capacitor, Ceramic, 1 nF/10 V, 0603, SMD
Murata, TDK
1
7
C6
Capacitor, Ceramic, 10 µF/10 V, 0603, SMD
Murata, TDK
1
8
C7
Capacitor, Electrolytic, 220 uF/10 V, 6.3 х 7 mm
Murata, TDK
1
9
C8
Capacitor, Electrolytic, 2.2 uF/50 V, 6.3 х 7 mm
Murata, TDK
1
10
L1
Inductor, 40 µH, 5 A, 20%, SMD
Tyco Electronics
1
11
D1
Diode, Schottky, 40 V/5 A, SK54BL
Diodes
1
12
R1
Chip Resistor, 7.87 kΩ, 0603, 1%
Murata, TDK
1
13
R2
Chip Resistor, 51 kΩ, 0603, 1%
Murata, TDK
1
14
R3
Chip Resistor, 15 kΩ, 0603, 5%
Murata, TDK
1
15
R4
Chip Resistor, 9.76 kΩ, 0603, 1%
Murata, TDK
1
16
R5
Chip Resistor, 150 kΩ, 0603, 1%
Murata, TDK
1
17
R6
Chip Resistor, 68 kΩ, 0603, 1%
Murata, TDK
1
18
R7
Chip Resistor, 47 kΩ, 0603, 5%
Murata, TDK
1
19
R8
Chip Resistor, 2.2 kΩ, 0603, 5%
Murata, TDK
1
20
R9
Chip Resistor, 820 Ω, 0603, 5%
Murata, TDK
1
Data Sheet Rev. A, September 2019 | Subject to change without notice
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
TYPICAL PERFORMANCE CHARACTERISTICS
(Schematic as show in Figure 9, Ta = 25 °C, unless otherwise specified)
Data Sheet Rev. A, September 2019 | Subject to change without notice
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
TYPICAL PERFORMANCE CHARACTERISTICS
(Schematic as show in Figure 9, Ta = 25 °C, unless otherwise specified)
Data Sheet Rev. A, September 2019 | Subject to change without notice
14 of 18
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
TYPICAL PERFORMANCE CHARACTERISTICS
(Schematic as show in Figure 9, Ta = 25 °C, unless otherwise specified)
Data Sheet Rev. A, September 2019 | Subject to change without notice
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© 2020 Qorvo US, Inc. All rights reserved.
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
TYPICAL PERFORMANCE CHARACTERISTICS
(Schematic as show in Figure 9, Ta = 25 °C, unless otherwise specified)
Data Sheet Rev. A, September 2019 | Subject to change without notice
16 of 18
© 2020 Qorvo US, Inc. All rights reserved.
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ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
PACKAGE OUTLINE
SOP-8EP PACKAGE OUTLINE AND DIMENSIONS
SYMBOL
DIMENSION IN MILLIMETERS
MIN
MAX
DIMENSION IN INCHES
MIN
MAX
A
1.350
1.700
0.053
0.067
A1
0.000
0.100
0.000
0.004
A2
1.350
1.550
0.053
0.061
b
0.330
0.510
0.013
0.020
c
0.170
0.250
0.007
0.010
D
4.700
5.100
0.185
0.200
D1
3.202
3.402
0.126
0.134
E
3.800
4.000
0.150
0.157
E1
5.800
6.200
0.228
0.244
E2
2.313
2.513
0.091
0.099
e
1.270 TYP
0.050 TYP
L
0.400
1.270
0.016
0.050
θ
0°
8°
0°
8°
Notes:
1. Lead Coplanarity is 0.1 mm max.
2. Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs
shall not exceed 0.15 mm per end.
3. Dimension E does not include interlead flash or protrusion. Interlead flash or protrusion shall not exceed
0.25 mm per side.
Data Sheet Rev. A, September 2019 | Subject to change without notice
17 of 18
© 2020 Qorvo US, Inc. All rights reserved.
www.qorvo.com
ACT4533A/B
Wide Input Sensorless CC/CV Step-DownDC/DC Converter
Contact Information
For the latest specifications, additional product information, worldwide sales and distribution locations:
Web: www.qorvo.com
Tel: 1-844-890-8163
Email: customer.support@qorvo.com
For technical questions and application information:
Email: appsupport@qorvo.com
Important Notice
The information contained herein is believed to be reliable; however, Qorvo makes no warranties regarding the information contained
herein and assumes no responsibility or liability whatsoever for the use of the information contained herein. All information contained
herein is subject to change without notice. Customers should obtain and verify the latest relevant information before placing orders
for Qorvo products. The information contained herein or any use of such information does not grant, explicitly or implicitly, to any
party any patent rights, licenses, or any other intellectual property rights, whether with regard to such information itself or anything
described by such information. THIS INFORMATION DOES NOT CONSTITUTE A WARRANTY WITH RESPECT TO THE
PRODUCTS DESCRIBED HEREIN, AND QORVO HEREBY DISCLAIMS ANY AND ALL WARRANTIES WITH RESPECT TO
SUCH PRODUCTS WHETHER EXPRESS OR IMPLIED BY LAW, COURSE OF DEALING, COURSE OF PERFORMANCE,
USAGE OF TRADE OR OTHERWISE, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
Without limiting the generality of the foregoing, Qorvo products are not warranted or authorized for use as critical components in
medical, life-saving, or life-sustaining applications, or other applications where a failure would reasonably be expected to cause
severe personal injury or death.
Copyright 2019 © Qorvo, Inc. | Qorvo® and Active-Semi® are trademarks of Qorvo, Inc.
Data Sheet Rev. A, September 2019 | Subject to change without notice
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