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RT8023GQW

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
RT8023
4
DS8023-03 March 2011www.richtek.com
Function Block Diagram
Driver
Control
Logic
0.72V
0.4V
OC
Limit
ISEN
Slope
Compensation
OSC
Output
Clamp
EA
0.8V
Internal-
Soft Start
POR
FB1
VIN1
VDD1
PGOOD1
GND
PHASE1
OTP
VREF2
VREF3
VIN2
Current Limit
FB3
EA
VOUT3
0.8V
0.72V
VIN3
Current Limit
FB2
EA
VOUT2
0.8V
0.72V
PGOOD3
OT
POR
PGOOD2
EN1
EN2
EN3
RT8023
5
DS8023-03 March 2011 www.richtek.com
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VIN1, VIN2 ----------------------------------------------------------------------------- −0.3V to 6V
z Output Pin Voltage ------------------------------------------------------------------------------------------------ −0.3V to (V
IN1
+ 0.3V)
z PHASE Pin Voltage ---------------------------------------------------------------------------------------------- −0.3V to (V
IN2
+ 0.3V)
z Other I/O Pin Voltages ------------------------------------------------------------------------------------------- −0.3V to 6V
z Power Dissipation, P
D
@ T
A
= 25°C
WQFN-24L 4x4 ---------------------------------------------------------------------------------------------------- 1.923W
z Package Thermal Resistance (Note 2)
WQFN-24L 4x4, θ
JA
----------------------------------------------------------------------------------------------- 52°C/W
WQFN-24L 4x4, θ
JC
---------------------------------------------------------------------------------------------- 7°C/W
z Junction Temperature --------------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------- 260°C
z Storage Temperature Range ------------------------------------------------------------------------------------ −65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Mode) -------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ---------------------------------------------------------------------------------------------- 200V
Electrical Characteristics
(T
A
= 25°C, unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Step-down converter
Input Voltage Range V
IN1
2.6 -- 5.5 V
Feedback Voltage V
FB1
0.784 -- 0.816 V
V
DD1
Rising 2.24 2.36 2.48 V
Under Voltage Lockout Threshold V
UVLO
V
DD1
Hysteresis -- 150 -- mV
DC Bias Current
Active, V
FB
= 0.75V,
Not Switching
-- 300 -- μA
Shutdown Current I
SHDN
EN2 = 0 -- -- 2 μA
Switch On Resistance, High R
FET_H
I
PHASE
= 0.5A -- 150 270 mΩ
Switch On Resistance, Low R
FET_L
I
PHASE
= 0.5A -- 90 150 mΩ
Peak Current Limit I
LIM
1.7 2.3 3.2 A
Switching Frequency 1 1.2 1.4 MHz
Output Voltage Line Regulation V
IN1
= 2.6V to 5.5V -- 0.01 1 %/V
To be continued
Recommended Operating Conditions (Note 4)
z Supply Input Voltage, Converter ------------------------------------------------------------------------------- 2.6V to 5.5V
z Supply Input Voltage, LDOs ------------------------------------------------------------------------------------ 2.4V to 5.5V
z Junction Temperature Range ------------------------------------------------------------------------------------
−40°C to 125°C
z Ambient Temperature Range ------------------------------------------------------------------------------------
−40°C to 85°C
RT8023
6
DS8023-03 March 2011www.richtek.com
Parameter Symbol Test Conditions Min Typ Max Unit
Output Voltage Load Regulation
Measured by sever loop, EA
output from 0.253V to 0.853V
-- 0.01 1 %
FB Threshold for PGOOD
Transition
0.68 0.72 0.76 V
PGOOD1 Pull-Down Resistance -- -- 100 Ω
EN1 Input High 1.4 -- -- V
EN1 Input Low -- -- 0.4 V
Thermal Shutdown Temperature T
SD
(Note 5) -- 145 --
Thermal Shutdown Hysteresis ΔT
SD
-- 25 --
°C
LDO1 (V
IN
= V
OUT
+ 0.5V, V
EN
= VI
IN
, C
IN
= C
OUT
= 1uF (Ceramic))
Input Voltage Range V
IN2
2.4 -- 5.5 V
Feed Back Voltage V
FB2
0.784 -- 0.816 V
Output Noise Voltage e
NO
V
OUT2
= 1.5V, I
OUT2
= 1mA -- 30 -- μV
RMS
Quiescent Current I
Q
V
EN2
= 5V, I
OUT2
= 0mA -- 35 60 μA
Shutdown Current I
SHD N
EN2 = 0 -- -- 2 μA
EN2 Pin Current I
EN2
Measured EN leakage current.
EN2 = 5.5V
-- 0.1 1 μA
Current Limit I
LIM
R
LOAD
= 0Ω 0.7 0.9 1.2 A
Dropout Voltage V
DROP
I
OUT2
= 500mA, V
IN2
> 2.7V -- 250 400 mV
Load Regulation ΔV
LOAD
1mA < I
OUT2
< 500mA,
V
IN2
> 2.7V
-- 1 -- %
Line Regulation ΔV
LINE
V
IN2
= (V
OUT2
+ 0.5) to 5.5V
I
OUT2
= 1mA
-- 0.01 0.2 %/V
Power Supply Rejection Ratio,
f = 100kHz
PSRR I
OUT2
= 300mA -- 40 -- dB
FB Threshold for PGOOD
Transition
-- 0.72 0.76 V
PGOOD2 Pull-Down Resistance -- -- 120 Ω
EN2 Input High 1.4 -- -- V
EN2 Input Low -- -- 0.4 V
LDO2 (V
IN
= V
OUT
+ 0.5V, V
EN
= V
IN
, C
IN
= C
OUT
= 1uF (Ceramic))
Input Voltage Range V
IN3
2.4 -- 5.5 V
Feed Back Voltage V
FB3
0.784 -- 0.816 V
Output Noise Voltage e
NO
V
OUT3
= 1.5V, I
OUT3
= 1mA -- 30 -- μV
RMS
Quiescent Current I
Q
V
EN3
= 5V, I
OUT3
= 0mA -- 35 60 μA
Shutdown Current I
SHD N
EN1 = 0 -- -- 2 μA
EN3 Pin Current I
EN3
Measured EN leakage current.
EN3 = 5.5V
-- 0.1 1 μA
To be continued
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

RT8023GQW

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IC REG TRPL BCK/LINEAR 24WQFN
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