Document
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RT8010/A
1.5MHz, 1A, High Efficiency PWM Step-Down DC-DC Converter
General Description
The RT8010/A is a high efficiency Pulse-Width-Modulated (PWM) step-down DC-DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8010/A is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices.
Two operating modes are available including : PWM/LowDropout autoswitch and shutdown modes. The Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application.
The RT8010/A enters Low Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8010/A enter shut-down mode and consumes less than 0.1μA when EN pin is pulled low.
The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. This along with small WDFN-6L 2x2 and WQFN-16L 3x3 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.
Features
2.5V to 5.5V Input Range Output Voltage (Adjustable Output From 0.6V to VIN)
RT8010 : 1V, 1.2V, 1.5V, 1.6V, 1.8V, 2.5V and 3.3V Fixed/Adjustable Output Voltage
RT8010A Adjustable Output Voltage Only 1A Output Current 95% Efficiency No Schottky Diode Required 1.5MHz Fixed-Frequency PWM Operation Small 6-Lead WDFN and 16-Lead WQFN Package RoHS Compliant and 100% Lead (Pb)-Free
Applications
Mobile Phones Personal Information Appliances Wireless and DSL Modems MP3 Players Portable Instruments
Pin Configuration
(TOP VIEW)
IC 1 EN 2 VIN 3
16 15 14 13
GND 1
12 VIN
6 FB/VOUT
GND 2
5 GND
GND 3
7 4 LX
FB/VOUT 4
11 VIN 10 VIN
17
9 VIN
5678
GND IC IC LX EN LX IC LX
WDFN-6L 2x2 (RT8010)
WQFN-16L 3x3 (RT8010A)
Copyright ©2019 Richtek Technology Corporation. All rights reserved. DS8010/A-12 March 2019
is a registered trademark of Richtek Technology Corporation.
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RT8010/A
Ordering Information
RT8010/A(- )
Pin 1 Orientation***
(3) : Quadrant 3, Follow EIA-481-D (For RT8010AGQW Only)
Package Type QW : WDFN/WQFN (W-Type)
Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free)
Output Voltage Default : Adjustable (RT8010/A) Fixed (RT8010) 10 : 1.0V 12 : 1.2V 15 : 1.5V 16 : 1.6V 18 : 1.8V 25 : 2.5V 33 : 3.3V WQFN-16L 3x3 WDFN-6L 2x2
Note : ***Empty means Pin1 orientation is Quadrant 1 Richtek products are :
RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
For marking information, contact our sales representative directly or through a Richtek distributor located in your area.
Copyright ©2019 Richtek Technology Corporation. All rights reserved. www.richtek.com 2
is a registered trademark of Richtek Technology Corporation.
DS8010/A-12 March 2019
Typical Application Circuit
VIN 2.5V to 5.5V
CIN 4.7µF
3 VIN
L 2.2µH LX 4
RT8010/A 2 EN VOUT 6
1 IC
GND 5
VOUT
COUT 10µF
Figure 1. Fixed Voltage Regulator
RT8010/A
VIN 2.5V to 5.5V
VOUT
VREF
x
1
R1 R2
3 VIN
LX 4
CIN
4.7µF
RT8010/A
L 2.2µH
C1
R1
2 EN 1 IC
FB 6 GND 5
IR2 R2
VOUT
COUT 10µF
with R2 = 300kΩ to 60kΩ so the IR2 = 2μA to 10μA,
and (R1 x C1) should be in the range between 3x10-6 and 6x10-6 for component selection.
Figure 2. Adjustable Voltage Regulator
Layout Guide
RT8010/A_FIX
IC 1 EN 2 VIN 3
6 VOUT 5 GND 4 LX
L1
Output capacitor must be near RT8010
COUT
CIN
CIN must be placed to the VIN as close as possible.
LX should be connected to Inductor by wide and short trace, keep sensitive components away from this trace.
RT8010/A_ADJ
IC 1 EN 2 VIN 3
6 FB
Output capacitor
5 GND
must be near
L1 RT8010/A
4 LX
COUT
CIN
CIN must be placed to the VIN as close as possible.
LX should be connected to Inductor by wide and short trace, keep sensitive components away from this trace.
R1 R2
Layout note :
Figure 3
1. The distance that CIN connects to VIN is as close as possible (Under 2mm).
2. COUT should be placed near RT8010/A.
Copyright ©2019 Richtek Technology Corporation. All rights reserved. DS8010/A-12 March 2019
is a registered trademark of Richtek Technology Corporation.
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RT8010/A
Functional Pin Description
Pin No.
RT8010
RT8010A
Pin Name
Pin Function
Internal connection. Leave floating and do not make connection
1
6, 8, 16
IC
to this pin.
2 7 EN Chip enable (Active High).
3
9, 10, 11, 12 VIN
Power input. (Pin 9 and Pin 10 must be connected with Pin 11).
4
13, 14, 15 LX
Pin for switching. (Pin 13 must be connected with Pin 14).
5
.