4
DS8555-01 August 2016www.richtek.com
RT8555
©
Copyright 2016 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Electrical Characteristics
Recommended Operating Conditions
(Note 4)
Junction Temperature Range--------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range--------------------------------------------------------------------------------------------- −40°C to 85°C
Parameter Symbol Test Conditions Min Typ Max Unit
Input Power Supply
Input Supply Voltage V
IN
2.7 3.8 24 V
Quiescent Current I
Q
LX no switching -- 2.7 -- mA
Shutdown Current I
SHDN
V
IN
= 3.8V, EN = 0V -- -- 1 A
Under-Voltage Lockout Threshold V
UVLO
V
IN
Rising -- 2.3 -- V
Under-Voltage Lockout Hysteresis V
UVLO
-- 200 -- mV
Over-Temperature Protection
Threshold
T
OTP
-- 150 -- C
Over-Temperature Protection
Hysteresis
T
OTP_HYS
-- 20 -- C
Interface Characteristic
EN, PWM, SCL, SDA
Input Voltage
Logic-High V
IH
1.4 -- -- V
Logic-Low V
IL
-- -- 0.8 V
Internal Pull-Low Current for EN,
PWM
I
IH_1
-- -- 10 A
Internal Pull-Low Current for SCL,
SDA
I
IH_2
-- 0.01 1 A
Output Low Level for SDA V
OL
External Pull High Current = 3mA -- 0.3 0.5 V
Output Leakage Current for SDA I
LK_DIO
SDA Pin Voltage = 3.3V -- -- 1 A
I
2
C Interface Timing
Maximum I
2
C Clock Frequency f
SC_MAX
-- 400 -- kHz
Absolute Maximum Ratings (Note 1)
Supply Voltage, VIN to GND --------------------------------------------------------------------------------------------- −0.3V to 26.4V
LX, VOUT, FB1, FB2, FB3, FB4, FB5, FB6 to GND --------------------------------------------------------------- −0.3V to 40V
EN, PWM, SDA, SCL, VCP to GND----------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, P
D
@ T
A
= 25°C
WL-CSP-20B 1.65 x 2.05 (BSC) --------------------------------------------------------------------------------------- 2.72W
Package Thermal Resistance (Note 2)
WL-CSP-20B 1.65 x 2.05 (BSC), θ
JA
---------------------------------------------------------------------------------- 36.7°C/W
Junction Temperature ------------------------------------------------------------------------------------------------------ 150°C
Lead Temperature (Soldering, 10 sec.)-------------------------------------------------------------------------------- 260°C
Storage Temperature Range --------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model)----------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ------------------------------------------------------------------------------------------------------ 200V
(V
IN
= 3.8V, C
IN
= 1μF, T
A
= 25°C, unless otherwise specified)
