RP602x Series
1.5 A PWM/VFM Buck-Boost DC/DC Converter with Synchronous Rectifier
No. EA-353-190507
OVERVIEW
The RP602x is a 6.5 V (Max. rating) buck-boost DC/DC converter with synchronous rectifier. This device
is ideally suited for industrial or OA equipment that require constant voltage even when low-input voltage
(Min. 2.3 V). Since operating with switching frequency of 2.6 MHz, this device can realize a high-speed
response with a small coil and maintain a high-efficiency at low input voltage.
KEY BENEFITS
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Realize a high-efficiency at low input voltage.
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Provide output voltage of 2.7 to 4.2 V corresponding to input voltage of 2.3 to 5.5 V.
KEYSPECIFICATIONS
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Input Voltage Range:2.3 V to 5.5 V
Output Voltage Range:2.7 V to 4.2 V (0.1V step)
Output Voltage Accuracy :±1.5%
Line Regulation: Typ. 0.5%, PWM mode
Load Regulation: Typ. 0.1%,
(I
OUT
= 0 to 500 mA, PWM mode)
Maximum Output Current: Typ. 1.5 A,
(PVIN = 3 V, VOUT = 3.3 V)
Maximum Burst Current: Typ. 2.7 A,
(PVIN=3 V, VOUT=3.3 V, Duty=10%, t=2.0 ms)
Overcurrent Limit Protection: Typ. 4.2 A
Oscillator Frequency: Typ. 2.6 MHz
Built-in Driver ON Resistance:
Typ. Pch. 80 mΩ, Nch. 80 mΩ
Operating Quiescent Current: Typ. 27.5 µA,
(VFM mode, Non-switching)
UVLO Detector Threshold: Typ. 2.0 V
Soft-start Time: Typ. 1.0 ms
Thermal Shutdown Temperature:Typ.150°C
Protection Feature: Overvoltage, Overcurrent
PACKAGE
RP602Z
RP602K
TYPICAL CHARACTERISTICS
Efficiency Characterisitcs (RP602Z330x, MODE = H)
TYPICAL APPLICATION
Control
MODE
BULX
L
Control
CE
BOLX
PV
IN
C
IN
AV
IN
GND
RP602x
V
OUT
V
FB
PGND
C
OUT
Load
OPTIONAL FUNCTION
The following functions are user-selectable options.
Code
A/E
B/F
C/G
D/H
WLCSP-20-P1
2.305 mm x 1.700 mm
DFN(PLP)2730-12
2.7mm×3.0mm
Auto-discharge
Latch
Reset
Function
Protection Protection
Yes
Yes
No
No
Yes
No
Yes
No
Yes
No
No
Yes
APPLICATIONS
•
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Power source for portable equipment such as laptops, PDAs, DSCs, cellular phones, and smartphones
Power source for Li-ion battery-used equipment
1
RP602x
No. JA-353-190507
PIN DESCRIPTION
RP602Z Pin Description
Top View
Bottom View
1
2
3
4
5
A B C D
1
2
3
4
5
D C B A
WLCSP-20-P1 Pin Configuration
Pin No.
A5, B5, C5
A4, B4, C4
A3, B3, C3
A2, B2, C2
A1, B1, C1
D1
D2
D3
D4
D5
Pin Truth Table
CE Pin
L
H
MODE Pin
(3)
-
H
L
Operation
OFF
PWM/ VFM Auto Switching Control Mode
Forced PWM Control Mode
Symbol
VOUT
(1)
BOLX
(1)
PGND
(2)
BULX
(1)
PVIN
(1)
AVIN
(1)
CE
MODE
AGND
(2)
VFB
Output Voltage Pin
Boost Switching Output Pin
Power GND Pin
Buck Switching Output Pin
Power Input Voltage Pin
Analog Power Input Voltage Pin
Chip Enable Pin, Active-high
Mode Control Pin,
Forced PWM Control: L, PWM/VFM Auto Switching Control: H
Analog GND Pin
Output Voltage Feedback Pin
Pin Description
(1)
(2)
(3)
The pin numbers sharing the same pin symbol must be connected together: A4, B4, and C4 of the BOLX pin, A2, B2,
and C2 of the BULX pin, A5, B5, and C5 of the VOUT pin. D1 of the AVIN pin and A1, B1, and C1 of the PVIN pin
must be connected together.
D4 of the AGND pin and A3, B3, and C3 of the PGND pin must be connected to the ground.
The logic to the MODE pin should not be changed while CE = “H”.
4
RP602x
No. JA-353-190507
RP602K Pin Description
Top View
Bottom View
DFN(PLP)2730-12 Pin Configuration
Pin No.
1
2
3
4
5
6
7
8
9,10
11
12
Symbol
AVIN
(1)
CE
MODE
NC
AGND
(2)
VFB
VOUT
BOLX
PGND
(2)
BULX
PVIN
(1)
Pin Description
Analog Power Input Voltage Pin
Chip Enable Pin, Active-high
Mode Control Pin,
Forced PWM Control: L, PWM/VFM Auto Switching Control: H
No Connection
Analog GND Pin
Output Voltage Feedback Pin
Output Voltage Pin
Boost Switching Output Pin
Power GND Pin
Buck Switching Output Pin
Power Input Voltage Pin
The tab on the bottom of the package must be connected to the ground plane on the board to enhance thermal
performance.
Pin Truth Table
CE Pin
L
H
MODE Pin
(3)
-
H
L
Operation
OFF
PWM/ VFM Auto Switching Control Mode
Forced PWM Control Mode
(1)
(2)
(3)
The AVIN pin and the PVIN pin must be connected together.
The AGND pin and the PGND pin must be connected to the ground.
The logic to the MODE pin should not be changed while CE = “H”.
5
编程基础
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