rt9206 Richtek Technology Corporation, rt9206 Datasheet - Page 7

• Manufacturer Part Number: rt9206
• Description: High Efficiency, Synchronous Buck With Dual Linear Controllers
• Manufacturer: Richtek Technology Corporation

DS9206-11 March 2007
PWM Section Reference Voltage
Feedback Voltage
Internal Voltage
Internal Voltage Source Current
Free Run Frequency
Operation Frequency Setting
Ramp Amplitude
Maximum Duty Cycle
GM
Compensation Source Current
Compensation Sink Current
Upper Gate Source (UGATE1 & 2)
Upper Gate Sink (UGATE1 & 2)
Lower Gate Source (LGATE1 & 2)
Lower Gate Sink (LGATE1 & 2)
Upper Gate Rising Time
Upper Gate Falling Time
Lower Gate Rising Time
Lower Gate Falling Time
Minimum On Time
Over Current Threshold
Over Voltage Protection
Under Voltage Protection
Linear Controller Section
Error Amplifier
Feedback Voltage
Output Current
Protection
Under Voltage Protection
Over Temperature Protection
Protection
PWM Section
Oscillator
Error Amplifier
Gate Driver
Parameter
VFB
VFB
LFB1 / LFB2
LDRV1/LDRV2
LFB1 / LFB2
V
V
I
F
F
R
R
R
R
T
T
T
T
INT
OSC
OSC
FB
INT
R_UGATE
F_UGATE
R_LGATE
F_LGATE
UGATE
UGATE
LGATE
LGATE
Symbol
I
V
By setting RT (Note 5)
V
V
V
V
INT
IN
DD
DD
DD
DD
= 12V
= 10mA
Test Condition
= 12V, C
= 12V, C
= 12V, C
= 12V, C
LOAD
LOAD
LOAD
LOAD
= 3nF
= 3nF
= 3nF
= 3nF
0.780
0.784
-270
0.54
0.54
Min
125
160
5.0
-30
0.9
45
45
20
85
10
--
--
--
--
--
--
--
--
--
--
--
-300
Typ
170
200
0.6
0.6
0.8
1.9
1.6
1.5
0.8
90
90
90
30
30
30
30
--
--
--
--
6
1
5
5
3
RT9206
www.richtek.com
0.816
0.824
0.66
0.66
Max
-330
240
+30
140
140
400
6.5
1.1
--
--
--
--
--
--
--
--
--
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8
8
5
3
Units
kHz
mA
mV
mA
ms
ns
%
%
ns
ns
ns
ns
V
V
V
V
V
V
V
C
A
A
7