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  Richtek Technology Electronic Components Datasheet  

RT8005 Datasheet

High-Efficiency Synchronous Buck PWM Converter

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RT8005
1A, 2MHz, High-Efficiency Synchronous Buck PWM Converter
General Description
The RT8005 is a high-efficiency synchronous buck PWM
converter with integrated P-Channel and N-Channel power
MOSFET switches. Capable of delivering 1A output current
over a wide input voltage range of 2.4V to 5.5V, the RT8005
is ideally suited for portable applications powered by a
www.DataSshienegtl4eUL.ci-oImon battery or by 3-cell NiMH/NiCd batteries. The
device operates at 2MHz PWM switching fixed frequency,
can use smaller CIN, COUT capacitor and inductor.
The RT8005 integrates two low RDS(ON) 230mand 180m
of high- and low-side switching MOSFETs to reduce board
space, as only resistors and capacitors along with one
inductor are required externally for operation. The RT8005
has adjustable output range down to 0.5V. The other
features include internal soft-start, chip enable, over-
temperature and over-current protections. It is available in
a space-saving VDFN-10L 3x3 package.
Ordering Information
RT8005
Package Type
QV : VDFN-10L 3x3 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richtek Pb-free and Green products are :
}RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
}Suitable for use in SnPb or Pb-free soldering processes.
}100% matte tin (Sn) plating.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
Features
l 2.4V to 5.5V Input Voltage Range
l Adjustable Output from 0.5V to VIN
l Guaranteed 1A Output Current
l Accurate Reference : 0.5V (±1.5%)
l Up to 90% Conversion Efficiency
l Typical Quiescent Current : 200µA
l Integrated Low RDS(ON) High- and Low-Side Power
MOSFET Switches : 230mand 180m
l Current Mode PWM Operation
l Fixed Frequency : 2MHz
l 100% Maximum Duty Cycle for Lowest Dropout
l Internal Soft-Start
l No Schottky Diode Required
l Over-Temperature and Over-Current Protection
l Small 10-Lead VDFN 3x3 Package
l RoHS Compliant and 100% Lead (Pb)-Free
Applications
l Battery-Powered Equipments
l Low Power CPU and DSP Supplies
l Digital Cameras and Hard Disks
l Protable Instruments and Notebook Computers
l Celluar Phones, PDAs, and Handheld PCs
l USB-Based DSL Modems and Other Network Interface
Cards
Pin Configurations
(TOP VIEW)
LX 1
PVDD 2
PVDD 3
VDD 4
EN 5
GND
11
10 PGND
9 PGND
8 GND
7 COMP
FB
VDFN-10L 3x3
DS8005-08 August 2007
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT8005 Datasheet

High-Efficiency Synchronous Buck PWM Converter

No Preview Available !

RT8005
Typical Application Circuit
www.DataSheet4U.com
VIN
2.4V to 5.5V
Chip Enable
CIN
2.2uF
5
4
VDD
2,3
PVDD
LX 1
EN
RT8005
LOUT
2.2uH
7
CCOMP
10nF
COMP
FB 6
GND
PGND 9, 10
8,
Exposed Pad (11)
R1
10k
R2
7.15k
VOUT
1.2V/1A
COUT
2.2uF
Recommended component selection for Typical Application Circuit.
VOUT (V)
0.5
VIN (V)
2.4 to 5.5
CIN (uF)
2.2
COUT (uF) LOUT (uH)
2.2/4.7
2.2
R1 (k)
10
1
2.4 to 5.5
2.2
2.2/4.7
2.2
10
1.2 2.4 to 5.5 2.2
2.2/4.7
2.2
10
1.8 2.4 to 5.5 2.2
2.2/4.7
2.2
10
2.5 3.3 to 5.5 2.2
2.2/4.7
2.2
10
3.3 4.2 to 5.5 2.2
2.2/4.7
2.2
10
R2 (k)
Open
10
7.15
3.83
2.49
1.78
CCOMP (nF)
10
10
10
10
10
10
Suggested Inductors
Component
Supplier
Series
Inductance
(µH)
ABC
SR0403
2.2
Sumida CDRH3D16
2.2
GOTREND GTSD53
2.2
DCR
(m)
47
59
29
Current Rating
(mA)
2600
Dimensions
(mm)
4.5x4x3.2
1750
4x4x1.8
2410
5x5x2.8
Suggested Capacitors For CIN and COUT
Component Supplier
Part No.
TDK
C1608X5R1A225M
Panasonic
ECJ1VB0J225M
TAIYO YUDEN JMK107BJ225M
Capacitance (uF)
2.2
2.2
2.2
Case Size
0603
0603
0603
www.richtek.com
2
DS8005-08 August 2007


Part Number RT8005
Description High-Efficiency Synchronous Buck PWM Converter
Maker Richtek
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RT8005 Datasheet PDF






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