RT8252ALGSP Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT8252ALGSP Datasheet PDF : 14 Pages
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RT8252A
Absolute Maximum Ratings (Note 1)
Supply Voltage, VIN ------------------------------------------------------------------------------------------ −0.3V to 25V
Input Voltage, SW -------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
VBOOT − VSW --------------------------------------------------------------------------------------------------- −0.3V to 6V
All Other Pin Voltages -------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------- 1.333W
Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θJA --------------------------------------------------------------------------------- 75°C/W
SOP-8 (Exposed Pad), θJC -------------------------------------------------------------------------------- 15°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------ 260°C
Junction Temperature ---------------------------------------------------------------------------------------- 150°C
Storage Temperature Range ------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) --------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ----------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
Supply Voltage, VIN ------------------------------------------------------------------------------------------ 4.5V to 23V
Junction Temperature Range ------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, TA = 25°C, unless otherwise specified)
Parameter
S ymbol
Test Conditions
Min Typ Max Unit
Shutdown Supply Current
VEN = 0V
--
0.5
3
μA
Supply Current
VEN = 3 V, VFB = 0.9V
--
0.8 1.2 mA
Feedback Voltage
Error Amplifier
Transconductance
High Side Switch On
Resistance
Low Side Switch
On-Resistance
High Side Switch Leakage
Current
VFB
GEA
RDS(ON)1
RDS(ON)2
4.5V ≤ VIN ≤ 23V
ΔIC = ± 10μA
VEN = 0V, VSW = 0V
0.788 0.8 0.812 V
--
940
-- μA/V
--
130
--
mΩ
--
130
--
mΩ
--
0
10
μA
Upper Switch Current Limit
COMP to Current Sense
Transconductance
GCS
Min. Duty Cycle, VBOOT− VSW = 4.8V 3.5 4.5
--
5
--
A
-- A/V
Oscillation Frequency
FOSC1
300 340 380 kHz
Short Circuit Oscillation
Frequency
FOSC2
VFB = 0V
--
110
-- kHz
Maximum Duty Cycle
Minimum On Time
DMA X
tON
VFB = 0.7V
--
93
--
%
-- 100
--
ns
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4
To be continued
DS8252A-02 March 2011
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