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  Richtek Technology Electronic Components Datasheet  

RT8015 Datasheet

Synchronous Step-Down Regulator

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Conceptual
RT8015www.DataSheet4U.com
2A, 4MHz, Synchronous Step-Down Regulator
General Description
The RT8015 is a high efficiency synchronous, step-down
DC/DC converter. Its input voltage range is from 2.6V to
5.5V and provides an adjustable regulated output voltage
from 0.8V to 5V while delivering up to 2A of output current.
The internal synchronous low on-resistance power
switches increase efficiency and eliminate the need for
an external Schottky diode. Switching frequency is set
by an external resistor or can be synchronized to an
external clock. 100% duty cycle provides low dropout
operation extending battery life in portable systems.
Current mode operation with external compensation
allows the transient response to be optimized over a wide
range of loads and output capacitors.
RT8015 operation in forced continuous PWM Mode which
minimizes ripple voltage and reduces the noise and RF
interference. 100% duty cycle in Low Dropout Operation
further maximize battery life.
Ordering Information
RT8015
Package Type
SP : SOP-8 (Exposed Pad)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Comme-
rcial 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.
Features
z High Efficiency : Up to 95%
z Low RDS(ON) Internal Switches : 110mΩ
z Programmable Frequency : 300kHz to 4MHz
z No Schottky Diode Required
z 0.8V Reference Allows Low Output Voltage
z Forced Continuous Mode Operation
z Low Dropout Operation : 100% Duty Cycle
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Portable Instruments
z Battery-Powered Equipment
z Notebook Computers
z Distributed Power Systems
z IP Phones
z Digital Cameras
Pin Configurations
(TOP VIEW)
SHDN/RT
GND
LX
PGND
8
27
GND
36
45
COMP
FB
VDD
PVDD
SOP-8 (Exposed Pad)
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.
DS8015-03C February 2007
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT8015 Datasheet

Synchronous Step-Down Regulator

No Preview Available !

RT8015
Conceptual
www.DataSheet4U.com
Typical Application Circuit
VIN
2.6V to 5.5V
ROSC
332k
RT8015
1 SHDN/RT
8
COMP
2 GND
3
LX
7
FB
6
VDD
4 PGND
PVDD 5
L1
1uH
Note : Using all Ceramic Capacitors
RCOMP
7.5k
CCOMP
1.5nF
R2 240k
CIN
22uF
R1
510k
COUT
22uF
VOUT
2.5V/2A
Layout Guide
CIN must be placed between
VDD and GND as closer as
possible
VIN CIN GND
PVDD
RT8015
54
Output capacitor must
be near RT8015
COUT VOUT
PGND
L1
LX should be
connected to
Inductor by wide
and short trace,
keep sensitive
compontents away
from this trace
VDD
FB
6
7
3 LX
2 GND
COMP
R1
CF R2 RCOMP
8
1 SHDN/RT
ROSC
VOUT
CCOMP
GND
Connect the FB pin directly to feedback resistors. The
resistor divider must be connected between VOUT and
GND.
Table 1
Component Supplier Series Inductance (uH) DCR (m) Current Rating (mA) Dimensions (mm)
TAIYO YUDEN
Sumida
GOTREND
ABC
NR 4018
CDRH4D28
GTSD53
SR0403
2.2
2.2
2.2
2.2
60
31.3
29
47
2700
2040
2410
2600
4x4x1.8
4.5x4.5x3
5x5x2.8
4.5x4x3.2
Component Supplier
TDK
TDK
Panasonic
Panasonic
Panasonic
TAIYO YUDEN
TAIYO YUDEN
TAIYO YUDEN
Table 2
Part No.
C3225X5R0J226M
C2012X5R0J106M
ECJ4YB0J226M
ECJ4YB1A226M
ECJ4YB1A106M
LMK325BJ226ML
JMK316BJ226ML
JMK212BJ106ML
Capacitance (uF)
22
10
22
22
10
22
22
10
Case Size
1210
0805
1210
1210
1210
1210
1206
0805
www.richtek.com
2
DS8015-03C February 2007


Part Number RT8015
Description Synchronous Step-Down Regulator
Maker Richtek Technology
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RT8015 Datasheet PDF






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