rt9218 Richtek Technology Corporation, rt9218 Datasheet - Page 6

• Manufacturer Part Number: rt9218
• Description: 5v/12v Synchronous Buck Dc-dc Linear Power Controller
• Manufacturer: Richtek Technology Corporation

RT9218
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
www.richtek.com
6
Power Good Rising Threshold
Power Good Hysteresis
PG Sink Capability
Power Good Rising Delay
Power Good Falling Delay
Error Amplifier (GM)
E/A Transconductance
Open Loop DC Gain
Linear Regulator
DRV Driver Source
Reference Voltage
PWM Controller Gate Drivers (V
Upper Gate Source
Upper Gate Sink
Lower Gate Source
Lower Gate Sink
Dead Time
Protection
FB Under-Voltage Trip
FBL Under-Voltage Trip
OC Current Source
Soft-Start Interval
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
is measured in the natural convection at T
Parameter
CC
g
A
I
V
R
I
R
T
Δ
Δ
I
T
I
Symbol
DS
LGATE
OC
UGATE
m
= 12V)
FBUVT
FBLUVT
SS
O
REFREG
DT
UGATE
LGATE
V
V
V
V
V
V
V
V
V
V
V
V
V
FB Falling
FB and FBL Falling
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
0.784
Min
0.6
0.6
70
70
--
--
--
--
--
--
--
--
--
--
--
--
1
DS9218-08 March 2007
Typ
0.2
1.4
0.8
3.5
0.2
90
75
40
90
10
15
75
--
1
4
1
3
3
0.816
Max
100
0.4
80
80
10
--
--
--
--
--
--
--
--
--
--
--
4
Units
mA
ms
ms
ms
dB
μA
ns
us
%
%
%
Ω
Ω
%
V
A
A
V