rt8297a Richtek Technology Corporation, rt8297a Datasheet - Page 4

• Manufacturer Part Number: rt8297a
• Description: 1.5a, 17v, 340/800khz Synchronous Step-down Converter
• Manufacturer: Richtek Technology Corporation

RT8297A/B
Absolute Maximum Ratings
Recommended Operating Conditions
www.richtek.com
4
Electrical Characteristics
(V
Shutdown Supply Current
Supply Current
Feedback Voltage
Feedback Current
High Side Switch On
Resistance
Low Side Switch On
Resistance
Upper Switch Current Limit
Lower Switch Current Limit
Oscillation Frequency
Short-Circuit Oscillation
Frequency
Maximum Duty Cycle
Supply Voltage, V
SW --------------------------------------------------------------------------------------------------------------- −0.3V to (V
BOOT ----------------------------------------------------------------------------------------------------------- (SW − 0.3V) to (SW + 0.3V)
All Other Pins ------------------------------------------------------------------------------------------------- −0.3V to 6V
WDFN-8L 2x2 ------------------------------------------------------------------------------------------------- 0.833W
Package Thermal Resistance (Note 2)
WDFN-8L 2x2, θ
WDFN-8L 2x2, θ
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
Supply Input Voltage, V
Junction Temperature Range ------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------- −40°C to 85°C
Power Dissipation, P
IN
= 12V, T
Parameter
A
= 25°C, unless otherwise specified)
JA
JC
IN
-------------------------------------------------------------------------------------------- 120°C/W
-------------------------------------------------------------------------------------------- 8.2°C/W
------------------------------------------------------------------------------------------ −0.3V to 19V
D
@ T
IN
----------------------------------------------------------------------------------- 4V to 17V
A
= 25°C
I
I
V
I
R
R
f
f
D
Symbol
SHDN
OUT
FB
OSC1
OSC2
FB
DS(ON)1
DS(ON)2
MAX
V
V
4V ≤ V
V
Min. Duty Cycle, V
Maximum Loading = 1.5A
From Drain to Source
For RT8297A
For RT8297B
V
V
V
V
EN
EN
FB
FB
FB
FB
FB
(Note 1)
= 0.8V
= 0V, For RT8297A
= 0V, For RT8297B
= 0.7V, For RT8297A
= 0.7V, For RT8297B
= 0V
= 3V, V
IN
≤ 17V
Test Conditions
FB
= 0.9V
(Note 4)
BOOT
−V
SW
= 4.8V
0.788
Min
300
700
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DS8297A/B-00 March 2011
Typ
145
140
340
800
170
0.6
0.8
2.5
10
95
93
84
1
1
To be continued
0.812
IN
Max
380
900
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5
1
+ 0.3V)
Unit
mΩ
mΩ
kHz
kHz
mA
μA
nA
%
%
V
A
A