rt9218b Richtek Technology Corporation, rt9218b Datasheet - Page 6

• Manufacturer Part Number: rt9218b
• Description: Synchronous Buck Dc-dc Linear Power Controller
• Manufacturer: Richtek Technology Corporation

RT9218B
Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are
Note 2. Devices are ESD sensitive. Handling precaution recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. θ
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6
Power Good Rising Threshold
Power Good Hysteresis
PG Sink Capability
Power Good Rising Delay
Power Good Falling Delay
E/A Transconductance
Open Loop DC Gain
DRV Driver Source
Reference Voltage
Upper Gate Source
Upper Gate Sink
Lower Gate Source
Lower Gate Sink
Dead Time
FB Under-Voltage Trip
FBL Under-Voltage Trip
OC Current Source
Soft-Start Interval
Error Amplifier (GM)
Linear Regulator
PWM Controller Gate Drivers (V
Protection
Power Good
for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for
extended periods may remain possibility to affect device reliability.
JEDEC 51-3 thermal measurement standard.
JA
Parameter
is measured in the natural convection at T
CC
g
A
I
V
R
I
R
T
Δ
Δ
I
T
Symbol
I
DS
LGATE
OC
UGATE
m
= 12V)
DT
FBUVT
FBLUVT
SS
O
REFREG
UGATE
LGATE
V
V
V
V
V
V
V
V
V
V
V
V
FB Falling
FB and FBL Falling
V
V
CC
CC
CC
CC
CC
DRV
CC
BOOT
UGATE
BOOT
UGATE
CC
CC
PHASE
= 12V
= 12V
= 12V, 1mA
= 12V
= 12V
= 12V
= 12V, V
= 12V, V
= 6V
− V
− V
A
− V
− V
= 0V
= 25°C on a low effective thermal conductivity test board of
Test Conditions
PHASE
PHASE
PHASE
PHASE
LGATE
LGATE
= 12V
= 12V
= 6V
= 1V
= 6V
= 1V
0.792
Min
0.6
0.6
70
70
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1
DS9218B-09 March 2007
Typ
0.2
1.4
0.8
3.5
0.2
90
75
75
40
90
10
15
--
1
4
1
3
3
0.808
Max
100
0.4
80
80
10
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4
Units
mA
ms
ms
ms
dB
μA
ns
us
%
%
%
%
Ω
Ω
V
A
A
V