RT8299 Datasheet, PDF (4/15 Pages) Richtek Technology Corporation – 3A, 24V, 500kHz Synchronous Step-Down Converter

RT8299
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, V_IN ----------------------------------------------------------------------------------- −0.3 to 26V
z Switching Voltage, SW ------------------------------------------------------------------------------------- −0.3 to (V_IN + 0.3V)
z Boot Voltage, BOOT ----------------------------------------------------------------------------------------- (V_SW − 0.3V) to (V_SW + 6V)
z All Other Pins ------------------------------------------------------------------------------------------------- −0.3 to 6V
z Power Dissipation, P_D @ T_A = 25°C
SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------- 1.333W
WDFN-10L 3x3 ------------------------------------------------------------------------------------------------ 1.429W
z Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θ_JA --------------------------------------------------------------------------------- 75°C/W
SOP-8 (Exposed Pad), θ_JC -------------------------------------------------------------------------------- 15°C/W
WDFN-10L 3x3, θ_JA ------------------------------------------------------------------------------------------ 70°C/W
WDFN-10L 3x3, θ_JC ------------------------------------------------------------------------------------------ 8.2°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
MM (Machine Model) ---------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
z Supply Voltage, V_IN ------------------------------------------------------------------------------------------- 3V to 24V
z Junction Temperature Range -------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range -------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Shutdown Current
I_SHDN
V_EN = 0V
Supply Current
V_EN = 3V, V_FB = 1V
Upper Switch On Resistance
Lower Switch On Resistance
Switch Leakage
Current Limit
V_EN = 0V, V_SW = 0V or 12V
I_LIM
V_BOOT − V_SW = 4.8V
Oscillator Frequency
Short Circuit Frequency
f_OSC
V_FB = 0.75V
V_FB = 0V
Maximum Duty Cycle
D_MAX
V_FB = 0.8V
Minimum On-Time
t_ON
Feedback Voltage
V_FB
4.5V ≤ V_IN ≤ 24V
EN Input
Logic-High V_IH
Threshold Voltage _{Logic-Low VIL}
Under Voltage Lockout Threshold V_UVLO V_IN Rising
Under Voltage Lockout Threshold
Hysteresis
ΔV_UVLO
Min Typ Max Unit
--
--
3 μA
--
1
-- mA
-- 100 -- mΩ
-- 100 -- mΩ
--
0
10 μA
-- 5.5 --
A
425 500 575 kHz
-- 150 -- kHz
--
93
--
%
-- 100 -- ns
788 800 812 mV
2
-- 5.5
V
--
-- 0.4
-- 2.8 --
V
-- 300 -- mV
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is a registered trademark of Richtek Technology Corporation.
DS8299-01 May 2012