RT9264 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – HIGH FREQUENCY HIGH EFFICIENCY STEP UP DC/DC CONVERTER

Preliminary
RT9264
High Frequency, High Efficiency, Step-up DC/DC Converter
General Description
The RT9264 is a compact, high efficient, step-up
DC/DC converter with current mode PWM control
loop, providing stable and high efficient operations
without external compensation.
The RT9264 suitable for 1 to 4 battery cells as well
as USB power applications providing up to 400mA
output current. The high switching rate minimized
the size of external components.
A 300mA LDO is included in RT9264 to provide a
secondary low noise output as well as an output
current stop in the shutdown mode. RT9264 is
provided in SOP-8 packages.
Ordering Information
RT9264… …
Package type
S : SOP-8
Operating temperature range
C: Commercial standard
Typical Application Circuit
Features
z 400mA High Supply Capability
z 90% Efficiency
z Switching Rate higher Than 1.4MHz
z Providing Flexibility for Using Internal and
External Power Switches
z Built-in 300mA LDO, also for the Zero-Output-
Current Shutdown Mode
z Boost DC-DC Integrating LDO for Up-Down
Regulation
z 8-Pin SOP Package
Applications
z Portable Instrument
z ADSL Modem
z USB Devices
Pin Configurations
Part Number
RT9264CS
(Plastic SOP-8)
Pin Configurations
TOP VIEW
GND ¹
EXT 2
8 CE
7 LX
LFB 3
LDOO 4
6 VDD
5 FB
V_IN
2.5V
V_{OU T2}
C3
10µF
VDD
CE RT9264 EXT
R4 ^{L DO O}
LX
42K _{L F B G N D}
FB
R3
22K
L1
R1
2.2µH
36K
D1
1N5819
R2 C2
22K 1µF
47µF
3.3V
V_{OU T1}
C1
47µF
Fig. 1 RT9264 Typical Application for Portable Instruments
DS9264-00 December 2001
www.richtek-ic.com.tw
1