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RT9226B Datasheet(PDF) 2 Page - List of Unclassifed Manufacturers

Part # RT9226B
Description  SYNCHRONOUS PWM STEP-DOWN DC/DC CONVERTER CONTROLLER
PDF  6 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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RT9226B Datasheet(HTML) 2 Page - List of Unclassifed Manufacturers

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RT9226B
Preliminary
www.richtek-ic.com.tw
DS9226B-01 May 2001
2
Absolute Maximum Ratings
Supply Voltage
15V
Input, Output or I/O Voltage
GND–0.3V to Vcc+0.3V
Ambient Temperature Range
0
°C to 70°C
Operating Junction Temperature Range
0
°C to 125°C
Storage Temperature Range
−65°C to 150°C
Package Thermal Resistance
SOP-14,
θJA
160
°C/W
Lead Temperature (Soldering, 10 sec.)
300
°C
Electrical Characteristics
(VCC = 12V, GND = 0V, TA = 25
°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
VCC Supply Current
Nominal Supply Current
ICC
UGATE Open
--
3
--
mA
Power-On Reset
VCC Rising Threshold
VOCSET = 4.5V
--
9.5
--
V
VCC Falling Threshold
VOCSET = 4.5V
--
7.5
--
V
Enable Input Threshold
VEN
0.2
--
2.2
V
Oscillator
Frequency
170
200
230
KHz
Ramp Amplitude
∆VOSC
--
1.9
--
V
Internal Voltage Reference
Reference Voltage
VREF
0.785
0.800
0.815
V
PWM Controller Error Amplifier
DC Gain
--
65
--
dB
PWM Controller Gate Driver
UGATE Source
RUGATE IUGATE = 0.3A
--
8
--
Ω
UGATE Sink
RUGATE IUGATE = 0.3A
--
6
--
Ω
LGATE Source
ILGATE
VCC = 12V, VLGATE = 6V
--
500
--
mA
LGATE Sink
RLGATE ILGATE = 1V
--
5
--
Ω
Protection
OCSET Current Source
IOCSET VOCSET = 4.5V
170
200
230
µA
Soft-start Current
ISS
VSS = 1.5V
--
10
--
µA
Over-voltage Trip (VSEN/VREF)
--
115
120
%
Power Good
Upper Threshold (VSEN/VREF)
--
108
--
%
Lower Threshold (VSEN/VREF)
--
92
--
%
PGOOD Voltage Low
VPGOOD IPGOOD = -5mA
--
0.5
--
V



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