Richtek RT8239A, Руководство пользователя

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RT8239A/B/C
7
DS8239A/B/C-06 October 2012 www.richtek.com
© Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Recommended Operating Conditions
(Note 4)
z
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- 5.5V to 25V
z
Junction Temperature Range -------------------------------------------------------------------------------------------- − 40 ° C to 125 ° C
z
Ambient Temperature Range -------------------------------------------------------------------------------------------- − 40 ° C to 85 ° C
Absolute Maximum Ratings
(Note 1)
z
VIN, ENLDO to GND ------------------------------------------------------------------------------------------------------
−
0.3V to 30V
z
BOOTx to PHASEx -------------------------------------------------------------------------------------------------------
−
0.3V to 6V
z
ENTRIPx, FBx, TON, BYP1, PGOOD, LDO5, LDO3, ENM/SECFB to GND -------------------------------
−
0.3V to 6V
z
PHASEx to GND
DC ----------------------------------------------------------------------------------------------------------------------------- − 0.3V to 30V
< 20ns ----------------------------------------------------------------------------------------------------------------------- − 8V to 38V
z
UGATEx to PHASEx
DC -----------------------------------------------------------------------------------------------------------------------------
−
0.3V to 6V
< 20ns -----------------------------------------------------------------------------------------------------------------------
−
5V to 7.5V
z
LGATEx to GND
DC ----------------------------------------------------------------------------------------------------------------------------- − 0.3V to 6V
< 20ns ----------------------------------------------------------------------------------------------------------------------- − 2.5V to 7.5V
z
Power Dissipation, P
D
@ T
A
= 25 ° C
WQFN-20L 3x3 ------------------------------------------------------------------------------------------------------------ 3.33W
z
Package Thermal Resistance (Note 2)
WQFN-20L 3x3,
θ
JA
------------------------------------------------------------------------------------------------------- 30
°
C/W
WQFN-20L 3x3, θ
JC
------------------------------------------------------------------------------------------------------ 7.5 ° C/W
z
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260 ° C
z
Junction Temperature ----------------------------------------------------------------------------------------------------- 150 ° C
z
Storage Temperature Range --------------------------------------------------------------------------------------------
−
65
°
C to 150
°
C
z
ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
Parameter Symbol Test Conditions Min Typ Max Unit
Input Supply
Rising Threshold -- 5.1 5.5
VIN Power On Reset
Falling Threshold 3.5 -- 4.5
V
VIN Shutdown Current
I
VIN_SHDN
V
ENLDO
= GND
-- 20 40
VIN Standby Supply Current
I
VIN_SBY
Both SMPS Off -- 250 350
μ
A
Quiescent Power Consumption I
Q
Both SMPSs on, FBx = 2.1V,
BYP1 = 5V, ENM = 3.3V (RT8239A)
-- 5 7 mW
SMPS Output and FB Voltage
FBx, CCM Operation -- 2 --
FBx Regulation Voltage
V
FBx
FBx, DEM Operation 1.98 2.006 2.03
V
(V
IN
= 12V, V
ENLDO
= 5V, V
ENTRIPx
= 2V, V
BYP1
= 5V, No Load on LDO5, LDO3, T
A
= 25 ° C, unless otherwise specified)
Electrical Characteristics