Richtek RT8509A, Руководство пользователя

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RT8509A
4
DS8509A-00 November 2013 www.richtek.com
© Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Electrical Characteristics
Recommended Operating Conditions
(Note 4)

Ambient Temperature Range -------------------------------------------------------------------------------------------- − 40 ° C to 85 ° C

Junction Temperature Range -------------------------------------------------------------------------------------------- − 40 ° C to 125 ° C
Absolute Maximum Ratings
(Note 1)

LX to GND -------------------------------------------------------------------------------------------------------------------
−
0.3V to 28V

VIN, EN to GND ------------------------------------------------------------------------------------------------------------
−
0.3V to 16.5V

Other Pins-------------------------------------------------------------------------------------------------------------------
−
0.3V to 6.5V

Power Dissipation, P
D
@ T
A
= 25
°
C
WDFN-12L 5x5 ------------------------------------------------------------------------------------------------------------- 3.38W

Package Thermal Resistance (Note 2)
WDFN-12L 5x5,
θ
JA
------------------------------------------------------------------------------------------------------- 29.5
°
C/W
WDFN-12L 5x5,
θ
JC
------------------------------------------------------------------------------------------------------- 7.5
°
C/W

Junction Temperature ----------------------------------------------------------------------------------------------------- 150
°
C

Storage Temperature Range --------------------------------------------------------------------------------------------
−
65
°
C to 150
°
C

Lead Temperature (Soldering, 10sec.) -------------------------------------------------------------------------------- 260 ° C

ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V
(V
IN
= 3.3V, V
OUT
= 10V, T
A
=25
°
C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Supply Current
Input Voltage Range V
IN
2.8 -- 14 V
Output Voltage Range
V
OUT
-- -- 24 V
Under Voltage Lockout
Threshold
V
UVLO
V
IN
Rising
-- 2.5 3 V
UVLO Hysteresis 
V
UVLO
-- 200 -- mV
V
FB
= 1.3V, LX Not Switching
-- 1 --
VIN Quiescent Current
I
Q
V
FB
= 1V, LX Switching -- 5 --
mA
Thermal Shutdown Threshold T
SD
Temperature Rising -- 155 --

C
Thermal Shutdown
Hysteresis

T
SD
-- 10 --

C
VOUT Over Voltage
Threshold
V
OUT
Rising
-- 26 -- V
Oscillator
Oscillator Frequency
f
OSC
1000 1200 1500 kHz
Maximum Duty Cycle
D
MAX
-- 90 -- %
Error Amplifier
FB Regulation Voltage
V
REF
1.2312 1.25 1.2688 V
FB Input Bias Current
I
FB
-- -- 100 nA
FB Line Regulation -- 0.05 0.2 %/V