RT9055
4
DS9055-02 August 2014www.richtek.com
©
Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Parameter Symbol Test Conditions Min Typ Max Unit
f = 100Hz, V
IN
= V
OUT
+ 1V,
C
OUT
= 2.2F, I
LOAD
= 50mA
-- 70 --
f = 1kHz, V
IN
= V
OUT
+ 1V,
C
OUT
= 2.2F, I
LOAD
= 50mA
-- 70 --
f = 10kHz, V
IN
= V
OUT
+ 1V,
C
OUT
= 2.2F, I
LOAD
= 50mA
-- 70 --
f = 100kHz, V
IN
=V
OUT
+ 1V,
C
OUT
= 2.2F, I
LOAD
= 50mA
-- 54 --
f = 200kHz, V
IN
= V
OUT
+ 1V,
C
OUT
= 2.2F, I
LOAD
= 50mA
-- 45 --
Power Supply Rejection
Ratio
PSRR
f = 300kHz, V
IN
= V
OUT
+ 1V,
C
OUT
= 2.2F, I
LOAD
= 50mA
-- 38 --
dB
Output Voltage Noise
C
OUT1
= C
OUT2
= 10F, 10Hz
to100kHz, I
OUT1
= I
OUT2
= 1mA
-- 100 -- V
RMS
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θ
JA
is measured at T
A
= 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. The CSP
balls connect directly to the internal GND copper plane by 2 vias, the via diameter is about 1mm.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. The dropout voltage is defined as V
IN
− V
OUT
, which is measured when V
OUT
is V
OUT(NORMAL)
− 100mV.
Note 6. It is guaranteed by design.
