RT9173B Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT9173B Datasheet PDF : 13 Pages
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RT9173B
Absolute Maximum Ratings (Note 1)
z Input Voltage ------------------------------------------------------------------------------------------------------------ 7V
z Power Dissipation, PD @ TA = 25°C
SOP-8 -------------------------------------------------------------------------------------------------------------------- 0.625W
TO-252 ------------------------------------------------------------------------------------------------------------------- 1.471W
z Package Thermal Resistance (Note 5)
SOP-8, θJA -------------------------------------------------------------------------------------------------------------- 160°C/W
SOP-8, θJC -------------------------------------------------------------------------------------------------------------- 23°C/W
TO-252, θJA ------------------------------------------------------------------------------------------------------------- 68°C/W
TO-252, θJC ------------------------------------------------------------------------------------------------------------- 8°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 2)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------ 2kV
MM (Machine Mode) -------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 3)
z Junction Temperature Range ---------------------------------------------------------------------------------------- –40°C to 125°C
Electrical Characteristics
(VIN = 2.5V, VCNTL = 3.3V, VREFEN = 1.25V, COUT = 10μF (Ceramic), TA = 25° C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Units
Output Offset Voltage
VOS
IOUT = 0A, Figure 1 (Note 4)
−20 0
20 mV
Load Regulation
ΔVLOAD
IL : 0A → 2A, Figure 1
IL : 0A → -2A
−20 0
20 mV
Input Voltage Range (DDR I/II) VIN
Keep VCNTL ≥ VIN on operation power 1.7 2.5/1.8 --
V
VCNTL on and power off sequences
3 3.3/5 6
Operating Current of VCNTL
ICNTL No Load
--
1 2.5 mA
Current In Shutdown Mode
ISHDN VREFEN < 0.2V, RL = 180Ω, Figure 2
--
50 90 μA
Short Circuit Protection
Current limit
ILIM
Figure 3,4
2.2 2.6 --
A
Over Temperature Protection
Thermal Shutdown Temperature TSD
Thermal Shutdown Hysteresis ΔTSD
3.3V ≤ VCNTL ≤ 5V
3.3V ≤ VCNTL ≤ 5V
125 170 -- °C
-- 35 -- °C
Shutdown Function
Shutdown Threshold Trigger
Output = High, Figure 5
Output = Low, Figure 5
0.6 --
--
V
--
-- 0.2
DS9173B-09 March 2007
www.richtek.com
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