RichTek Product Selection Guide

Linear Voltage Regulator

Single-Output
Part
No.
IOUT(mA)
IGND1(μA)
VOUT(V)
VIN (Min)
VIN (Max)
Accuracy(%)
Features2
Packages
600
220
1.2~4.5
3
5.5
-1~+3
Ultra-FTR
SOT-223
300
58
1.2~3.6
2.5
5.5
2
FTR, OTP, OCP
TSOT-23-6
500
25
1.5~3.3, 1.25, 1.85, 2.85
2.2
5.5
±2
Low Dropout, Low Noise
SOT-23-5, SC-70-5, WDFN-6L 2x2
500 (Peak)
90
1.5~3.5, 1.85, 2.85
2.2
5.5
±2
BP, Ultra-Low-Noise for RF, Ultra-FTR
SOT-23-5, WDFN-6L 2x2
500 (Peak)
90
1.5~3.5, 1.85, 2.85
2.5
5.5
±2
Ultra-Low-Noise for RF, Ultra-FTR
SOT-23-3, SOT- 23-5, WDFN-6L 2x2
300/500
110
1.5~5.0
12
±2
Low Quiescent Current
SOT-23-3, SOT-89, SOT-223, TO-92
300
4.5mA
3.3, 3.5
15
±2
Bipolar, Low Dropout
SOT-89, TO-92
500
4.5mA
3.3, 3.5, 5.0
15
±2
Bipolar, Low Dropout
SOT-89, SOT-223, TO-252, TO-92
1A
5mA
Adj., 1.5, 1.8, 2.5, 2.85, 3.3, 3.5
12
±2
Bipolar, Low Dropout
SOT-223, TO-252, TO-263
1A
5mA
Adj., 1.5, 1.8, 2.5, 2.85, 3.0, 3.3, 3.5
3
12
±2
Bipolar, Low Dropout
SOT-223, TO-252, TO-263
1A
5mA
3.3
3
12
±0.5
Bipolar, Low Dropout
TO-252
150
4.5mA
5.0, 8.0
16
±3
Bipolar, Low Dropout
SOT-89, TO-92
300/600
220
1.2~4.5
2.8
5.5
-1~+3
Ultra-FTR
SOT-89, SOT-223, TO-92, SOT-23-3 (RT9166 only)
300/500
90
1.5~5.0, 2.85
2.9
7
±2
SHDN/BP, Low-Noise
SOT-23-5, SOP-8
200/500
90
1.5~5.0
2.9
7
±2
SHDN, Low-Noise
SOT-23-5, SOP-8
100
4
1.2~5.0
2
6
±2
Ultra Low Quiescent Current
SOT-23-3, SOT-23-5, SOT-89, TO-92
300
15
1.2~3.3
2
5.5
±2
Low Quiescent, Low Input, EN
SOT-23-3, SOT-23-5, SOT-89
3A
1.2mA
1.5~3.3
2.25
5.5
±1.5
EN/Flag/Sense, Low Dropout
SOP-8, SOT-223, TO-263, TO-263-5, TO-220, TO-220-5
1.5A
5mA
Adj., 1.5, 1.8, 2.5, 2.85, 3.3, 3.5
3
12
±2
Low Dropout
SOT-223,T0-252,T0-263
200/500
90
2.4~3.2, 2.85
2.5
6
±2
SHDN/BP, Low-Noise
SOT-23-5
200
90
2.4~3.2, 2.85
2.5
6
±2
SHDN/BP, Ultra Low-Noise, FTR
SOT-23-5
300
150
Adj.
3
5.5
EN
SOT-23-5
500
150
Adj.
3
5.5
EN
SOP-8
150
160
1.2, 1.8
3
5.5
±1.5
SHDN/PGOOD
SOT-23-5
1.5A
380
Adj., 1.2, 1.8, 2.5, 3.3
2.3
5.5
±2
EN, Ultra Low Dropout
SOT-223, SOP-8, TO-263, TO-263-5
500
190
Adj., 1.8, 2.5, 3.3
2.5
5.5
±3
EN, PGOOD/Reset
MSOP-8, VDFN 3x3-8L
1A
380
Adj., 1.0, 1.2, 1.5, 1.8, 2.5, 2.8, 3.0, 3.3
2.5
5.5
±2
Ultra-Low-Noise
VDFN 3x3-8L
300
90
1.5~3.5, 1.85, 2.85
2.5
5.5
±2
EN, High PSRR, Low-Noise
SOT-23-5, SC-70-5, WDFN 2x2-6L
Ext. MOS
300
Adj.
4.5
13.5
±2
EN, PGOOD
SOT-23-6
300
90
1.5~3.5, 1.85, 2.85
2.5
5.5
±2
EN, High PSRR
SOT-23-3, SOT-23-5, SC-70-5
1 : IGND : Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN-IOUT under no load condition (IOUT = 0mA).
2 : SHDN = Shutdown, EN = Enable, BP = Bypass, FTR = Fast Transient Response, PGOOD = Power OK Signal

Dual-Output
Part
No.
IOUT(mA)
IGND1(μA)
VOUT(V)
VIN (Min)
VIN (Max)
Accuracy(%)
Features2
Packages
300
27
1.2~3.6
2.5
5.5
2
FTR, Low Noise
TSOT-23-6, WDFN-8L 2x2
300
27
1.2~3.6
2.5
5.5
2
FTR, Low Noise
WDFN-8L 2x2
300
27
1.2~3.6
2.5
5.5
2
EN Function Dependent/Independent
WDFN-10L 3x3
200
165
Series
2.7
5.5
±2
SHDN, FTR
SOT-23-6
500
440
1.2~4.5/1.2~4.5
2.8
5.5
-1~+3
FTR
SOP-8
100
8
3.0~/1.8~
2
6
±2
FTR
SOT-23-5
1 : IGND : Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN-IOUT under no load condition (IOUT = 0mA).
2 : SHDN = Shutdown, EN = Enable, BP = Bypass, FTR = Fast Transient Response, PGOOD = Power OK Signal

Multi-Output
Part
No.
IOUT(mA)
IGND1(μA)
VOUT(V)
VIN (Min)
VIN (Max)
Accuracy(%)
Features2
Packages
0.1A4
0.8mA
Adjustable
3
8
+-2.5
Triple Linear Regulator Controller with OCP, OTP3 and Driving Capability Source/Sink Min.: 100mA/5mA
SOP-8
1.5A / 0.8A / 0.3A
0.4mA
3.35V at 1.5A, 2.55V at 0.8A and (1.8V/1.5V) at 0.3A
3.5
5.5
+2/-1
SHDN, EN, BP, FTR and PGOOD
SOP-8, TO-252-5, TO-263-5
1 : IGND : Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN-IOUT under no load condition (IOUT = 0mA).
2 : SHDN = Shutdown, EN = Enable, BP = Bypass, FTR = Fast Transient Response, PGOOD = Power OK Signal

DDR Bus Termination Regulator
Part
No.
Output
Offset Voltage
Load Regulation
Output
Current Max.
VIN(V)
Control Volt.
Range(V)
Features2
Packages
±20mV
±2%
±1.5A/±3.0A
1.8~6
3.3~6
OCP,OTP
RT9173 : SOP-8, RT9173A : TO-252-5, TO-263-5
±20mV
±20mV
±2.0A
1.8~6
3.3~6
OCP, OTP
SOP-8, TO-252-5
±20mV
±20mV
±2.0A
1.8~6
3.3~6
OCP, OTP
PSOP-8
±20mV
±20mV
±3A
1.8~6
3.3~6
OCP, OTP
PSOP-8
±20mV
±20mV
±1.8A
1.8~3.3
3.3~6
OCP, OTP
PSOP-8
1 : OCP = Over-Current Protection, OTP = Over-Temperature Protection

ACPI Controllers
Part
No.
5VDUAL Active/Sleep
3VDUAL Active/Sleep
VMEM Active/Sleep
Features
Packages
Yes
Yes
2.5V/3.3V
Simple Control Design, Small Size, Under-Voltage Monitoring
SOP-16
Yes
Yes
2.6V/3.43V
Simple Control Design, Small Size, Under-Voltage Monitoring
SOP-16

Switching

VR Specified
>VRM8.x<
Part
No.
Description
Switch VIN
VOUT(VCORE)
IC VCC
Package
LSB (mV)
Synchronous buck converter controller
5V
1.3V~3.5V
12V
SOP-20
50
Synchronous Buck for CPU
5V
1.05V~1.825V
12V
SOP-20
25
Synchronous Buck with Dual Fixed Linear Controllers
5V
1.3V~3.5V
12V
SOP-24
50
Synchronous Buck with Dual Linear Controllers
5V
1.3V~2.05V
2.1V~3.5V
12V
SOP-24
50
100
Synchronous Buck with Triple Linear Controllers
5V
1.3V~2.05V
2.1V~3.5V
12V
SOP-28
50
100
Synchronous Buck with Triple Linear Controllers
5V
1.09V~1.825V 1.85V~2.05V
12V
SOP-28
25
50
>VRM9.x<
Part
No.
Description
Switch VIN
VOUT(VCORE)
IC VCC
Packages
LSB (mV)
Multi-Phase PWM Controller for CPU Core Power Supply
12V by Drivers
1.55~0.375
5V
VQFN-32L 5x5
12.5
Synchronous Buck for CPU
5V
1.075V~1.85V
12V
SOP-20
25
200kHz, 2-4 Phase Synchronous Buck
12V by drivers
1.1V~1.85V
5V
SOP-28
25
100kHz, 2-4 Phase Synchronous Buck
12V by Drivers
1.1V~1.85V
5V
SOP-28
25
200kHz/100kHz, 2 Phase Synchronous Buck
12V by Drivers
1.075V~1.85V
5V
SOP-20
25
2-3 Phase Synchronous Buck Controller
12V by Drivers
VID125=H(0.850V~1.6V)
VID125=L(1.625V~1.85)~(1.1V~1.6V
5V
TSSOP-28
25
>VRM10.x<
Part
No.
Description
Switch VIN
VOUT(VCORE)
IC VCC
Package
LSB (mV)
2/2-3 Phase PWM Controller
12V by Drivers
0.8375V ~ 1.6V
5V
SOP-16, VQFN 3x3-16L
12.5
General Purpose 3-Phase PWM Controller
12V by Drivers
0.8375V ~ 1.6V
5V
VQFN 3x3-16L
12.5
Multi-Phase PWM Controller for CPU Core Power Supply
12V by Drivers
0.8375V ~ 1.6V
5V
VQFN-32L 5x5
12.5
2-4 Phase Synchronous Buck Controller
12V by Drivers
0.8375V ~ 1.6V
5V
SOP-32
12.5
2-4 Phase PWM Controller for Intel VRD10.X
12V by Drivers
0.8375V ~ 1.6V
5V
TSSOP-28
12.5
2-4 Phase PWM Controller
12V by Drivers
0.8375V~1.6V
5V
TSSOP-28
12.5
2-3 Phase PWM Controller
5V
0.8375V~1.6V
5V
TSSOP-28
12.5
2-3 Phase PWM Controller
12V by Drivers
VID125=H(0.850V~1.6V)
VID125=L(1.625V~1.85)~(1.1V~1.6V
5V
TSSOP-28
25
5-Bit DAC Generator
5V
0.85V~1.6V
5V
SOT-23-8
25
>AMD K8<
Part
No.
Description
Switch VIN
VOUT(VCORE)
IC VCC
Packages
LSB (mV)
2-4 Phase Synchronous Buck PWM Controller
12V by Drivers
0.8V~1.55V
5V
SOP-32
25
2-4 Phase PWM Controller
12V by Drivers
1.55V - 1.8V
5V
TSSOP-28
25
2-3 Phase Synchronous Buck PWM Controller
12V by Drivers
0.8V~1.55V
5V
TSSOP-28
25
Multi-Phase PWM Controller
12V by Drivers
0.8V~1.55V
5V
TSSOP-8
25
5-Bit DAC Generator
5V
0.8V~1.55V
5V
SOT-23-8
25

　

Step-down DC/DC Control
Part
No.
VIN(V)
VOUT(V)
IGND1(A)
Freq. (kHz)
Eff.(%)Max.
Features2
Others
Packages
2.5~12
0.8~3.3
10
200
93
S-S, OCP
VQFN-16L 3x3
12
>0.8
10mA
Adj.
90
S-S, OCP, PGOOD
VQFN-16L 3x3
<5
>0.8
3mA
300
S-S
OCSET Current Source = 40uA
SOP-8
<5
>0.8
3mA
300
S-S
OCSET Current Source = 20uA
SOP-8
<12
>0.8
3mA
300
S-S, V.D (Built-in)
Latch/Hiccup Mode
SOP-8
<5
>0.8
3mA
600
S-S, V.D (Built-in), EN
Latch/Hiccup Mode
SOP-8
<5
>0.8
3mA
300
S-S, V.D (Built-in)
Latch/Hiccup Mode
SOP-14
4.75~28
>0.8
1mA
Adj.
92
S-S, V.D (Built-in x 2), EN
SOP-16
<12
>0.8
3mA
260/400
S-S
N/A
SOP-8
<5
Vout1 >0.8, Vout2=1/2 Vout1
5mA
300
S-S, EN
TSSOP-24, SOP-24
<5
>0.8
5mA
300
S-S, V.D (Built-in), EN
TSSOP-24
5~12
>0.8
6mA
300
92
S-S, EN
SOP-8
5~12
>0.8
6mA
300
92
S-S, EN, LDO Controller
SOP-14
5~12
>0.8
6mA
300
92
S-S, EN, LDO Controller
1%Accuracy
SOP-14
<5
>0.8
3mA
200
S-S, LDO (Built-in), EN
SOP-14
3.3~12
>0.8
3mA
50~800
S-S, V.D (Built-in), EN
SOP-14
3.3~12
>0.8
3mA
50~800
S-S, V.D (Built-in), EN
SOP-14
3.3~12
>0.8
3mA
50~800
S-S, SW (Ext.), EN
SOP-14
3.3~12
>0.8
5mA
50~1000
S-S, V.D (Built-in), EN
VQFN 5x5-32L
1 : IGND : Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN-IOUT under no load condition (IOUT = 0mA).
2. EN = Chip Enable, SW (In.) = Internal Switch, SW (Ext.) = External Switch, V.D (Built-in) = Voltage Detector Built in, S-S = Soft Start.

Step-down DC/DC Converter
Part
No.
VIN(V)
VOUT(V)
IGND1(A)
Freq. (kHz)
Eff.(%)Max.
Features2
Others
Packages
2.4~5.5
>0.5
200uA
2000
>90%
S-S (In.), EN
VDFN-3x3-10L
2.5~5.5
>0.85
85uA
800
95
S-S, EN
VDFN-3x3 10L
1 : IGND : Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN-IOUT under no load condition (IOUT = 0mA).
2. EN = Chip Enable, SW (In.) = Internal Switch, SW (Ext.) = External Switch, V.D (Built-in) = Voltage Detector Built in, S-S = Soft Start.

Step-up DC/DC Converter
Part
No.
VIN(V)
VOUT(V)
IGND1(A)
Freq.(kHz)
Eff.(%)Max.
Features2
Others
Packages
0.85~7
1.5~5.0
5μA
80~160
75
SW (In.)/SW (Ext.), EN
N/A
SOT-23-5, SOT-89
0.85~7
1.5~5.0
10μA
140~240
75
EN, SW (In.)
SOT-23-5, SOT-89
1~6.5
Adjustable
17μA
550
90
LDO (Built-in)/V.D (Built-in),
EN, SW (In.), SW (Ext.)
SOP-8
1~6.5
Adjustable
17μA
550
90
EN, SW (In.), SW (Ext.)
SOT-89-5
1~6.5
Adjustable
17μA
450
90
EN, SW (In.), SW (Ext.)
SOT-23-6, SOT-89-5
1~6.5
Adjustable
25μA
550
90
EN, SW (In.), SW (Ext.)
SOT-23-6
1~6.5
Adjustable
40μA
550
90
EN, SW (In. x 2), SW (Ext.), V.D (Built-in), LDO (Built-in)
TSSOP-16
2~6.5
Adjustable
1mA
1300
90
EN, SW (In.), SW (Ext.)
SOT-23-6
1~6.5
Adjustable
17μA
500
90
EN, SW (In.), SW (Ext.)
SOT-23-6
2.3~5.5
Adjustable , Up to 14V
270μA
670/1300
90
EN, SW (In.)
MSOP-8
0.9~6
Adjustable
50μA
400
90
EN, SW (In.), SW (Ext.)
SOT-23-6
2.5~5.5
Adjustable, Up to 16V
50μA
640K,1.2M
90
S-S, UVLO, OCP & OTP
MSOP-8
1 : IGND : Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN-IOUT under no load condition (IOUT = 0mA).
2. EN = Chip Enable, SW (In.) = Internal Switch, SW (Ext.) = External Switch, V.D (Built-in) = Voltage Detector Built in, S-S = Soft Start.

Universal DC/DC Converter
Part
No.
VIN(V)
VOUT(V)
IGND1(A)
Freq.(kHz)
Eff. (%)
Topology
Packages
3~30
Adjustable
3mA
100
85
Buck/Boost/Inverting
SOP-8,DIP-8
1 : IGND : Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN-IOUT under no load condition (IOUT = 0mA).

PWM MOSFET Driver
Part
No.
Description
IC VCC (max)
PWM Input
Control Signal (max)
Switch VIN(max)
Shoot-Through
Protection
Package
Synchronous-Rectified BuckMOSFET Driver (Single)
15V
7V
15V
V
SOP-8
Synchronous-Rectified BuckMOSFET Driver (Dual)
15V
7V
15V
V
SOP-14
Synchronous-Rectified BuckMOSFET Driver (Single)
15V
7V
15V
V
SOP-8
Synchronous-Rectified Buck MOSFET Driver (Triple)
15V
7V
15V
V
TSSOP-28

Multi-Channel DC/DC Converter

White LED Driver
Part
No.
Eff.(%) Max.
Freg.(Hz)
Output Volt. Range(V)
Iutput Volt. Range(V)
Max. LED Numbers
Backlight Type
Brightness Control
Others
Packages
85
1.1M
< 20V
2.4V~6V
3
Single Series WLED
PWM/Analog DC
SOT-23-5, SOT-23-6
85
1.1M
< 16V
2.7V~4.5V
4
Dual Series WLED
PWM/Analog DC
VDFN 3x3-10L
85
1.1M
< 16V
2.7V~4.5V
4
Dual Series WLED + OLED
PWM/Analog DC
VDFN 3x3-10L
95
600k
2.4~5.5
1.5~5.5
1
High Power Flash WLED
PWM
VDFN-10L 3x3
85
1.2M
< 20V
2.7~5.5
5
Series WLED / OLED
PWM
FB Voltage = 1.235V/0.25V
TSOT-23-5, TSOT-23-6
85
1.2M
<20V
2.7~5.5
5
Series WLED / OLED
PWM
FB Voltage = 1.235V/0.25V
TSOT-23-5, TSOT-23-6
N/A
N/A
UVLO = 2.1V
2.5~5.5
4
Low Dropout Current Source
Current Matching
Sink Current = 20mA/15mA
SOT-23-6
N/A
N/A
IOUT from 2mA to 50mA by ISET resistor
2.8~5.5
3
Low Dropout RGB LED Driver
Current Matching
TSOT-23-8
N/A
N/A
Output Current up to 20mA Each Channel
2.8~5.5
3
Pulse Dimming Current Source
16-step Brightness Dimming Control
TSOT-23-8
90
250k/1M
< 6V
2.5V~5V
4
Parallel WLED
PWM/Analog DC
VQFN 4x4-16L
90
1M/250k
< 6V
2.5V~5.5V
4
Parallel WLED
PWM/Analog DC
VQFN 3x3-16L
> 80
1M
< 5.5
2.8~5
3
Charge Pump Current Source
PWM
TSOT-23-8
> 80
250k
< 2.5
2.8~5
4
Charge Pump Current Source
PWM Dimming
WQFN-16L 3x3

PMIC
Part
No.
VIN(V)
Channel-No.
Buck
(Sync)
Boost
(Sync/Asyn)
LDO/L.C.
C.P./V.D.
GPM/OPA
Others
Packages
2.4~5.5
4
2
-/1
1/1
VQFN 5x5-32L
2.4~5.5
5
2
-/1
-/1
1/-
VQFN 5x5-32L
2.4~5.5
5
-/4
1/-
VQFN 4x4-24L
2.4~5.5
4
-/4
VQFN 4x4-24L
2.4~5.5
3
2
-/1
VQFN 4x4-24L
1.6~5.5
6
1
1/1
1/-
Inverter x 1, Buck/Boost Selectable x 1
VQFN-40L 6x6
2.5~5.5
6
-/1
1/1
-/1
1/1
VQFN-24L 4x4
1 : L.C = Linear Controller, C.P = Charge Pump, V.D = Voltage Detector

Amplifier

Amplifier
Part
No.
VIN
Channel No.
Typ. Offset(mV)
Supply current(uA)
Ouput Current(mA)
Peak Current(mA)
Slew Rate(V/us)
Swing
AVOL(dB)
CMRR(dB)
PSRR(dB)
Channel Separation(dB)
4.5~15
1/2
10
500
35
120
12
Rail-to-Rail
95
80
70
75
4.5~15
4
2
500
35
120
12
Rail-to-rail
90
70
70
75

Others

USB Power Switch
Part
No.
VIN(V)
Enable
Flag
Output Current (A)
Current Limit
Programmable/Fixed
RDS(ON) Typical
Packages
2.2~6
Yes
No
1.1
Fixed
85 mOhm
SOT-23-5
5
Yes
No
1.1
Fixed
85 mOhm
SOT-23-5
2~6
Yes
Yes
0.5/1.1
Fixed
80m Ohm
SOT-23-5
2~5.5
Yes
Yes
3.0
Programmable
80m Ohm
SOP-8
2~5.5
Yes
Yes
3
Adjustable Current Limiting Up To 3.5A
50m Ohm
SOT-23-6
1.5~5.5
No
No
1
Programmable
80m Ohm
TSSOP-8
1.5~5.5
No
Yes
1
Programmable
80m Ohm
TSSOP-8
2~5.5
Yes
Yes
500mA
Fixed
80m Ohm
SOT-23-5

Voltage Detector
Part
No.
VIN(V)
Threshold Range
Delay Time(ms)
Output Stage
Programmable
Packages
0.9~6
2.5~5/1.5~4
200
N-Channel Open-Drain
Yes
SOT-23-6
0.9~6
2.5~5/1.5~4
200
CMOS Push-Pull
Yes
SOT-23-6
0.9~6
1.2~5
0/55/220/450
N-Channel Open-Drain
No
SC-70-4
0.9~6
1.2~5
0/55/220/450
CMOS Push-Pull
No
SC-70-4, SOT-143
0.9~6
1.2~5
0/55/220/450
N-Channel Open-Drain
No
SC-70-3, SC-70-4, SOT-23-3, SOT-23-5, SOT-89
0.9~6
1.2~5
0/55/220/450
CMOS Push-Pull
No
SC-70-3, SC-70-4, SOT-23-3

Battery Charger
Part
No.
Cell Chemistry
No. of Cells
VIN(V)
VOUT(V)
Mode
Charge rate
Packages
Li-Ion, Li-Ploy
1
4.5~7
4.1/4.2
Linear
Max. 1A
MSOP-8

Photoflash Capacitor Charger
Part
No.
VIN(V)
IGND1(A)
Internal Switch
External Switch
Internal IGBT Driver
External IGBT Driver
Charge Current
Packages
1.8~6.5
1.01
V
V
Set by resister or GPO
QFN 3x3-16L
1 : IGND : Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN-IOUT under no load condition (IOUT = 0mA).