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PDF RT8097C Data sheet ( Hoja de datos )
| Número de pieza | RT8097C | |
| Descripción | CMCOT Synchronous Step-Down Converter | |
| Fabricantes | Richtek | |
| Logotipo |  |
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RT8097C
2A, 1MHz, 6V CMCOT Synchronous Step-Down Converter
General Description
The RT8097C is a high efficiency synchronous step-
down DC/DC converter. Its input voltage range is from
2.7V to 6V and provides an adjustable regulated output
voltage from 0.6V to 3.4V while delivering up to 2A of
output current.
The internal synchronous low on-resistance power
switches increase efficiency and eliminate the need for
an external Schottky diode. The Current Mode
Constant-On-time (CMCOT) operation with internal
compensation allows the transient response to be
optimized over a wide range of loads and output
capacitors. The RT8097C is available in the SOT-23-
5/6 package.
Ordering Information
RT8097C
Package Type
B : SOT-23-5
E : SOT-23-6
Lead Plating System
G : Green (Halogen Free and Pb Free)
UVP Option
H : Hiccup
L : Latched-Off
C : PSM/PWM
Note :
Richtek products are :
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Features
Efficiency Up to 95%
RDS(ON) 100m HS / 70m LS
VIN Range 2.7V to 6V
VREF 0.6V with 2% Accuracy at 25C
CMCOT™ Control Loop Design for Best
Transient Response, Robust Loop Stability with
Low-ESR (MLCC) COUT
Soft-Start 1.2ms; PGOOD Function in SOT-23-6
Power Saving at Light Load
Applications
STB, Cable Modem, & xDSL Platforms
LCD TV Power Supply & Metering Platforms
General Purpose Point of Load (POL)
Pin Configurations
(TOP VIEW)
FB VIN
54
23
EN GND LX
SOT-23-5
FB PG VIN
654
23
EN GND LX
SOT-23-6
Simplified Application Circuit
VIN
CIN
RT8097C
VIN LX
EN
PG* FB
GND
L
VOUT
R1 COUT
R2
*For SOT-23-6 Package Only
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
DS8097C-02 May 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT8097C
Absolute Maximum Ratings (Note 1)
Supply Input Voltage ------------------------------------------------------------------------------------------ 0.3V to 6.5V
LX Pin Switch Voltage----------------------------------------------------------------------------------------- 0.3V to (VIN + 0.3V)
<20ns-------------------------------------------------------------------------------------------------------------- 4.5V to 7.5V
Power Dissipation, PD @ TA = 25C
SOT-23-5--------------------------------------------------------------------------------------------------------- 0.43W
SOT-23-6--------------------------------------------------------------------------------------------------------- 0.5W
Package Thermal Resistance (Note 2)
SOT-23-5, JA--------------------------------------------------------------------------------------------------- 230.6C/W
SOT-23-6, JA--------------------------------------------------------------------------------------------------- 197.4C/W
Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------- 260C
Junction Temperature ----------------------------------------------------------------------------------------- 40C to 150C
Storage Temperature Range -------------------------------------------------------------------------------- 65C to 150C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Supply Input Voltage -------------------------------------------------------------------------------------------2.7V to 6V
Ambient Temperature Range---------------------------------------------------------------------------------40C to 85C
Junction Temperature Range --------------------------------------------------------------------------------40C to 125C
Electrical Characteristics
(VIN = 3.6V, TA = 25C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Input Voltage
VIN
Feedback Reference Voltage VREF
Feedback Leakage Current IFB
VFB = 3.3V
DC Bias Current
Active ,VFB = 0.63V, Not Switching
Shutdown
Switching Leakage Current
Switching Frequency
Switch On Resistance, Low RNMOS ISW = 0.3A
Switch On Resistance, High RPMOS ISW = 0.3A
Valley Current Limit
ILIM
Under-Voltage Lockout
Threshold
VUVLO
VDD Rising
VDD Falling
Over-Temperature Threshold
Enable Input Logic-High
Voltage
Logic-Low
VIH
VIL
Min
2.7
0.588
--
--
--
--
0.8
--
--
2.2
--
--
--
1.5
--
Typ
--
0.6
--
22
--
--
1
70
100
3.1
2.25
2
150
--
--
Max
6
0.612
1
--
1
1
1.2
--
--
3.9
2.5
--
--
--
0.4
Unit
V
V
A
A
A
MHz
m
m
A
V
°C
V
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
DS8097C-02 May 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
VOUT
(10mV/Div)
Voltage Ripple
VIN = 3.3V, VOUT = 1.2V, IOUT = 1A
VOUT
(10mV/Div)
RT8097C
Voltage Ripple
VIN = 5V, VOUT = 3.3V, IOUT = 1A
VLX
(2V/Div)
VEN
(2V/Div)
VPGOOD
(2V/Div)
VOUT
(1V/Div)
IOUT
(1A/Div)
Time (1μs/Div)
Power On from EN
VIN = 3.3V, VOUT = 1.2V, IOUT = 0A
Time (500μs/Div)
VLX
(2V/Div)
VEN
(2V/Div)
VPGOOD
(2V/Div)
VOUT
(1V/Div)
IOUT
(1A/Div)
Time (1μs/Div)
Power Off from EN
VIN = 3.3V, VOUT = 1.2V, IOUT = 0A
Time (10ms/Div)
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
DS8097C-02 May 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
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| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet RT8097C.PDF ] | |
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