RT9237 Ver la hoja de datos (PDF) - Richtek Technology
Número de pieza
componentes Descripción
Fabricante
RT9237 Datasheet PDF : 15 Pages
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RT9237
Preliminary
Absolute Maximum Ratings
z Supply Voltage
z Input, Output or I/O Voltage
z Ambient Temperature Range
z Operating Junction Temperature Range
z Storage Temperature Range
z Power Dissipation, PD @ TA = 25°C
SOP-28
z Package Thermal Resistance
SOP-28, θJA
z Lead Temperature (Soldering, 10 sec.)
Electrical Characteristics
(VDD = 5V, GND = 0V, TA = 25°C, unless otherwise specified)
Parameter
Symbol Test Conditions
VDD Supply Current
Nominal Supply Current
Power-On Reset
IDD
PWM 1,2,3,4 Open
VDD Rising Threshold
VDD Falling Threshold
VDVD Rising Trip Threshold
Oscillator
Frequency
For each phase
Ramp Amplitude
Ramp Valley
∆VOSC RIRMP = 56kΩ
Maximum On Time of Each Channel
IRMP Pin Voltage
Reference and DAC
RIRMP = 56kΩ
DACOUT Voltage Accuracy
DAC (VID0-VID4) Input Low Voltage
DAC (VID0-VID4) Input High Voltage
DAC (VID0-VID4) Bias Current
PWM Controller Error Amplifier
DC Gain
Bandwidth
Slew Rate
Current Sense GM Amplifier
CL = 10pF
ISP 1,2,3,4 Full Scale Source Current
ISP 1,2,3,4 Current for OCP
www.richtek-ic.com.tw
2
7V
GND-0.3V ~ VDD+0.3V
0°C ~ 70°C
0°C ~ 125°C
-65°C ~ 150°C
0.625W
60°C /W
260°C
Min Typ Max Units
--
6
--
mA
4.2 4.35 4.5
V
3.7 3.85 4
V
1.19 1.25 1.31
V
170 200 230 kHz
--
1
--
V
1.0 1.3
--
V
--
75
--
%
0.95
1
1.05
V
-1.0
-- +1.0 %
--
--
0.8
V
2.0
--
--
V
10
20
40
µA
--
85
--
dB
--
10
-- MHz
--
5
-- V/µS
--
50
--
µA
80
--
--
µA
To be continued
DS9237-00 January 2002
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