RT7253ALGSP Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT7253ALGSP Datasheet PDF : 14 Pages
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RT7253A
Absolute Maximum Ratings (Note 1)
Supply Voltage, VIN ------------------------------------------------------------------------------------------------- −0.3V to 18.7V
Input Voltage, SW --------------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
VBOOT - VSW ----------------------------------------------------------------------------------------------------------- −0.3V to 6V
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 17V
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
Shutdown Supply Current
VEN = 0V
Supply Current
Feedback Voltage
Error Amplifier
Transconductance
High Side Switch
On-Resistance
Low Side Switch
On-Resistance
High Side Switch Leakage
Current
Upper Switch Current Limit
Lower Switch Current Limit
COMP to Current Sense
Transconductance
Oscillation Frequency
Short Circuit Oscillation
Frequency
Maximum Duty Cycle
Minimum On Time
VFB
GEA
RDS(ON)1
RDS(ON)2
GCS
fOSC1
fOSC2
DMA X
tON
VEN = 3 V, VFB = 0.9V
4.5V ≤ VIN ≤ 17V
ΔIC = ± 10μA
VEN = 0V, VSW = 0V
Min. Duty Cycle, VBOOT−VSW = 4.8V
From Drain to Source
VFB = 0V
VFB = 0.7V
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4
Min Typ Max Unit
--
0.5
3
μA
--
0.8 1.2 mA
0.788 0.8 0.812 V
--
940
-- μA/V
--
120
--
mΩ
--
120
--
mΩ
--
0
10 μA
--
5.1
--
A
--
1.3
--
A
--
4.7
-- A/V
300 340 380 kHz
--
100
-- kHz
--
93
--
%
-- 100
--
ns
To be continued
DS7253A-02 March 2011
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