RT9903BGQV RICHTEK [Richtek Technology Corporation], RT9903BGQV Datasheet - Page 6

• Manufacturer Part Number: RT9903BGQV
• Description: 4 Channel DC/DC Converters IC with High-Efficiency Step-Up
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT9903B
Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are
Note 2. The device is not guaranteed to function outside its operating conditions.
Note 3. θ
Note 4. Pull low EN1, EN2 and EN4 when they are not enabled. EN3 pin is automatically pulled low when not enabled.
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6
Oscillator
Free Running Frequency
CH1, CH2, CH3 Maximum Duty Cycle
CH4 Maximum Duty Cycle
Reference Voltage (CH1, CH2, CH3, CH4)
Feedback Reference Voltage
Feedback Reference Voltage
Error Amplifier
GM
Compensation Source Current
Compensation Sink Current
Power Switch
CH1 On Resistance of MOSFET
CH1 Current Limitation
CH2 On Resistance of MOSFET
CH2 Current Limitation
CH3 On Resistance of MOSFET
CH3 Current Limitation
CH4 Over Current Threshold Voltage
CH4 On Resistance of N-MOSFET
CH4 On Resistance of P-MOSFET
Control
EN1, EN2, EN3, EN4 Input High Level Threshold
EN1, EN2, EN3, EN4 Input Low Level Threshold
External Current Setting (CH4)
CS4 Sourcing Current
Thermal Protection
Thermal Shutdown
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
Preliminary
F
D
D
V
V
R
R
R
I
T
CS4
Symbol
OSC
SD
FB1, 2, 4
FB3
MAX1,2,3
MAX4
DS1(ON)
DS2(ON)
DS3(ON)
A
= 25°C on a low effective thermal conductivity test board of
RT = Open
CH1, CH2, CH4
CH3
FB1 = COMP
N-MOSFET, V
N-MOSFET, V
N-MOSFET, V
V
V
VDDM
VDDM
Test Condition
= 3.3V
= 3.3V
DD
DD
DD
= 3.3V
= 3.3V
= 3.3V
0.98
0.18
Min
400
0.3
0.7
0.7
0.7
0.4
93
75
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3
8
DS9903B-07 August 2007
Typ
500
200
180
0.4
0.2
0.6
0.6
0.6
0.8
0.8
95
80
22
22
20
10
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1
6
Max Units
1.02
0.22
600
0.5
1.3
12
85
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9
kHz
μA
μA
μA
°C
μs
Ω
Ω
Ω
Ω
Ω
%
%
V
V
A
A
A
V
V
V