Richtek RT9198-15GBG, RT9198-15GBR, RT9198-15GU5, RT9198-15GV, RT9198-15GY Schematic [ru]

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RT9198/A

300mA, Low Noise, Ultra-Fast CMOS LDO Regulator

General Description

The RT9198/A is designed for portable RF and wireless applications with demanding performance and space requirements. The RT9198/A performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The RT9198/A also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The RT9198/A consumes less than 0.01uA in shutdown mode and has fast turn-on time less than 50us. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the SOT-23-3, SOT-23-5, TSOT-23-3, TSOT-23-5, SC-70-5, SC-82, MSOP-8 and WDFN-6L 2x2 packages, the RT9198/Aalso offers a range from 1.5V to 5.0V with 0.1V per step.

Features

zLow-Noise for RF Application

zFast Response in Line/Load Transient

zQuick Start-Up (Typically 50us)

z< 0.01uA Standby Current When Shutdown

zLow Dropout : 220mV @ 300mA

zWide Operating Voltage Ranges : 2.5V to 5.5V

zTTL-Logic-Controlled Shutdown Input

zLow Temperature Coefficient

zCurrent Limiting Protection

zThermal Shutdown Protection

zOnly 1uF Output Capacitor Required for Stability

zHigh Power Supply Rejection Ratio

zCustom Voltage Available

zRoHS Compliant and 100% Lead (Pb)-Free

Applications

Ordering Information

RT9198/A-

Package Type

U5 : SC-70-5

U5R : SC-70-5 (R-Type) Y : SC-82

V : SOT-23-3

B : SOT- 23-5

BR : SOT- 23-5 (R-Type)

BG : SOT- 23-5 (G-Type) J3 : TSOT- 23-3

J5 : TSOT- 23-5

J5R : TSOT- 23-5 (R-Type)

J5G : TSOT- 23-5 (G-Type) F : MSOP-8

QW : WDFN-6L 2x2 (W-Type)

Lead Plating System P : Pb Free

G : Green (Halogen Free and Pb Free)

Output Voltage 15 : 1.5V

16 : 1.6V

:

49 : 4.9V

50 : 5.0V

1H : 1.85V

2H : 2.85V

4G : 4.75V

Chip Enable Function (Active Low)

Chip Enable Function (Active High)

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.

Marking Information

For marking information, contact our sales representative directly or through a Richtek distributor located in your area.

zCDMA/GSM Cellular Handsets

zBattery-Powered Equipment

zLaptop, Palmtops, Notebook Computers

zHand-Held Instruments

zPCMCIA Cards

zPortable Information Appliances

DS9198/A-14 April 2011

www.richtek.com

1

RT9198/A

Pin Configurations

(TOP VIEW)

VOUT

 

NC

 

VIN

 

VOUT

 

NC

VOUT

 

VIN

 

5

 

4

 

 

5

 

4

 

5

4

 

3

 

 

 

 

 

 

 

 

 

 

 

2

3

 

 

 

2

3

 

2

3

 

2

 

 

 

 

 

 

 

 

 

VIN

GND EN/EN

 

EN/EN

NC GND

 

EN/EN GND VIN

GND

VOUT

TSOT-23-5/SOT-23-5/

TSOT-23-5/SOT-23-5/

 

TSOT-23-5/

TSOT-23-3/

SC-70-5 (R-Type)

 

SC-70-5

 

SOT-23-5(G-Type)

SOT-23-3

 

 

 

 

 

 

 

 

 

 

VIN

VOUT

 

 

EN/EN

1

 

6

NC

NC

 

 

8

EN/EN

4

3

 

 

GND

NC

2

 

7

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND 2

5

NC

GND

3

 

6

NC

 

2

 

 

VIN 3

7

4

VOUT

VIN

4

 

5

VOUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EN/EN

GND

 

 

WDFN-6L 2x2

 

MSOP-8

 

SC-82

 

 

Typical Application Circuit

 

 

RT9198

 

VIN

CIN

VIN

VOUT

VOUT

 

 

 

COUT

 

1uF

 

 

1uF

Chip Enable

EN

GND

 

On

 

 

 

 

Off

 

 

 

 

 

 

RT9198A

 

VIN

CIN

VIN

VOUT

VOUT

 

 

 

COUT

 

1uF

 

 

1uF

Chip Enable

EN

GND

 

Off

 

 

 

 

On

 

 

 

 

www.richtek.com

DS9198/A-14 April 2011

2

RT9198/A

Functional Pin Description

 

Pin Name

Pin Function

 

EN

Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low

 

100kΩ resistor connected to GND when the control signal is floating.

 

 

 

 

 

 

 

 

 

 

Chip Enable (Active Low). Note that this pin is high impedance. There should be a pull high

 

EN

 

100kΩ resistor connected to VIN when the control signal is floating.

 

 

 

 

 

 

 

 

NC

No Internal Connection.

 

 

 

 

 

GND, Exposed Pad

Ground. The exposed pad must be soldered to a large PCB and connected to GND for

 

maximum power dissipation.

 

 

 

 

VOUT

Output Voltage.

 

 

 

 

 

VIN

Input Voltage.

 

 

 

 

Function Block Diagram

 

 

 

EN/EN

 

Shutdown

VIN

 

 

 

 

and

 

 

 

Logic Control

 

VREF

 

 

 

 

-

MOS Driver

 

 

 

 

 

+

 

 

 

Error

VOUT

 

 

Amplifier

 

 

Current-Limit

 

 

 

and

 

 

 

Thermal

 

 

 

Protection

 

 

 

 

GND

DS9198/A-14 April 2011

www.richtek.com

3

RT9198/A

Absolute Maximum Ratings

(Note 1)

 

 

 

 

 

 

z Supply Input Voltage ----------------------------------------------------------------------------------------------------

 

 

 

 

 

6V

 

 

 

z Power Dissipation, PD @ TA = 25°C

 

 

 

 

 

 

 

TSOT-23-3/TSOT-23-5/SOT-23-3/SOT-23-5

------------------------------------------------------------------------

 

 

400mW

SC-70-5, SC-82 ----------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

300mW

MSOP-8 -------------------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

625mW

WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

606mW

z Package Thermal Resistance

(Note 2)

 

 

 

 

 

 

 

TSOT-23-3/TSOT-23-5/SOT-23-3/SOT-23-5, θJA -------------------------------------------------------------------

 

 

250°C/W

SC-70-5, SC-82, θJA -----------------------------------------------------------------------------------------------------

 

 

 

 

 

333°C/W

MSOP-8, θJA --------------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

160°C/W

WDFN-6L 2x2, θJA -------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

165°C/W

WDFN-6L 2x2, θJC -------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

20°C/W

z Junction Temperature ---------------------------------------------------------------------------------------------------

 

 

 

 

 

150°C

 

 

 

z Lead Temperature (Soldering, 10 sec.) -----------------------------------------------------------------------------

 

 

 

260°C

 

 

 

z Storage Temperature Range -------------------------------------------------------------------------------------------

 

 

 

 

 

−65°C to 150°C

z ESD Susceptibility

(Note 3)

 

 

 

 

 

 

 

 

 

HBM (Human Body Mode) ---------------------------------------------------------------------------------------------

 

 

 

 

 

2kV

 

 

 

MM (Machine Mode) ----------------------------------------------------------------------------------------------------

 

 

 

 

 

200V

 

 

 

Recommended Operating Conditions (Note 4)

 

 

 

 

 

 

z Supply Input Voltage ----------------------------------------------------------------------------------------------------

 

 

 

 

 

2.5V to 5.5V

z EN Input Voltage ---------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

0V to 5.5V

z Junction Temperature Range ------------------------------------------------------------------------------------------

 

 

 

 

 

−40°C to 125°C

z Ambient Temperature Range ------------------------------------------------------------------------------------------

 

 

 

 

 

−40°C to 85°C

Electrical Characteristics

 

 

 

 

 

 

 

(VIN = VOUT + 1V, CIN = COUT = 1μF, TA = 25°C, unless otherwise specified)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

 

Symbol

Test Conditions

Min

Typ

Max

 

Unit

 

Output Voltage Accuracy

 

VOUT

IOUT = 1mA

−2

--

+2

 

%

 

Current Limit

 

 

ILIM

RLOAD = 1Ω

360

400

--

 

mA

 

Quiescent Current

 

 

IQ

RT9198, VEN 1.2V, IOUT = 0mA

--

90

130

 

μA

 

 

 

RT9198A, VEN 0.4V, IOUT = 0mA

 

 

 

 

 

 

 

 

 

 

 

 

Dropout Voltage

(Note 5)

 

VDROP

IOUT = 200mA

--

170

200

 

mV

 

 

IOUT = 300mA

--

220

330

 

 

 

 

 

 

 

 

 

Line Regulation

 

 

VLINE

VIN = (VOUT + 1V) to 5.5V,

--

--

0.3

 

%

 

 

 

IOUT = 1mA

 

 

 

 

 

 

 

 

 

 

 

 

Load Regulation

 

 

VLOAD

1mA < IOUT < 300mA

--

--

0.6

 

%

 

Shutdown Current

 

 

ISHDN

RT9198, VEN = GND, Shutdown

--

0.01

1

 

μA

 

 

 

RT9198A, VEN = VIN, Shutdown

 

 

 

 

 

 

 

 

 

 

 

 

EN Input Bias Current

 

IIBEN

VEN = GND or VIN

--

0

100

 

nA

 

 

 

 

 

 

 

 

To be continued

 

 

 

 

 

 

 

 

 

 

 

www.richtek.com

 

 

 

 

 

DS9198/A-14

April 2011

4

RT9198/A

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

 

Logic-Low

VIL

RT9198, VIN = 3V to 5.5V, Shutdown

--

--

0.4

 

EN Threshold

Voltage

RT9198A, VIN = 3V to 5.5V, Enable

V

 

 

 

 

Logic-High

VIH

RT9198, VIN = 3V to 5.5V, Enable

1.2

--

--

 

 

 

Voltage

RT9198A, VIN = 3V to 5.5V, Shutdown

 

 

 

 

 

 

 

Power Supply

f = 100Hz

PSRR

COUT = 1μF, IOUT = 100mA

--

−60

--

dB

Rejection Rate

f = 10kHz

--

−30

--

 

 

 

 

 

 

 

 

 

 

 

Thermal Shutdown

TSD

 

--

165

--

°C

Temperature

 

 

Thermal Shutdown

TSD

 

--

30

--

°C

Temperature Hysteresis

 

 

 

 

 

 

 

Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are 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.

Note 2.

θJA is measured in the natural convection at TA = 25°C on a low effective single layers thermal conductivity test board

 

of JEDEC 51-3 thermal measurement standard. The case point of θJC is on the exposed pad for the package.

Note 3. Devices are ESD sensitive. Handling precaution is recommended.

Note 4. The device is not guaranteed to function outside its operating conditions.

Note 5.

The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV.

DS9198/A-14 April 2011

www.richtek.com

 

5

Richtek RT9198-15GBG, RT9198-15GBR, RT9198-15GU5, RT9198-15GV, RT9198-15GY Schematic

RT9198/A

Typical Operating Characteristics

Output Voltage vs. Temperature

 

2

VIN = 5V

 

 

 

 

 

 

 

 

CIN = COUT = 1uF

 

 

 

 

 

(V)

1.9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Voltage

1.8

 

 

 

 

 

 

 

 

 

 

No Load

 

 

 

 

 

 

Output

 

 

 

 

 

 

 

 

1.7

 

 

 

 

 

 

 

 

 

1.6

 

 

 

 

 

 

 

 

 

 

-50

-25

0

25

50

75

100

125

Temperature (°C)

EN Pin Shutdown Threshold vs. Temperature

 

1.5

RT9198/A-15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(V)

 

VIN = 3.3V

 

 

 

 

 

 

1.25

CIN = COUT = 1uF

 

 

 

 

 

Voltage

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

Pin Threshold

0.75

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

EN

 

 

 

 

 

 

 

 

 

 

0.25

 

 

 

 

 

 

 

 

 

 

-50

-25

0

25

50

75

100

125

Temperature (°C)

Dropout Voltage vs. Load Current

 

300

RT9198/A-33

 

 

 

 

 

 

250

CIN = COUT = 1uF

 

TJ = 125°C

 

(mV)

 

 

 

 

 

 

200

 

 

 

 

 

 

Voltage

 

 

TJ = 25°C

 

 

 

 

 

 

 

 

 

150

 

 

 

 

 

 

 

 

 

 

 

TJ = -40°C

 

Dropout

 

 

 

 

 

 

100

 

 

 

 

 

 

50

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

0

0.05

0.1

0.15

0.2

0.25

0.3

Load Current (A)

Quiesent Current vs. Temperature

 

100

RT9198/A-15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

95

VIN = 3.3V

 

 

 

 

 

 

 

CIN = COUT = 1uF

 

 

 

 

 

(uA)

 

 

 

 

 

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Current

85

 

 

 

 

 

 

 

 

80

 

 

 

 

 

 

 

 

Quiescent

75

 

 

 

 

 

 

 

 

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

65

 

 

 

 

 

 

 

 

 

60

 

 

 

 

 

 

 

 

 

 

-50

-25

0

25

50

75

100

125

Temperature (°C)

Current Limit vs. Input Voltage

 

600

RT9198/A-15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

550

CIN = COUT = 1uF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Limit (mA)

500

 

 

 

 

 

 

 

 

 

450

 

 

 

 

 

 

 

 

 

Current

400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

350

 

 

 

 

 

 

 

 

 

 

300

 

 

 

 

 

 

 

 

 

 

2

2.5

3

3.5

4

4.5

5

5.5

6

6.5

Input Voltage (V)

 

20

 

 

PSRR

 

 

 

 

VOUT = 2.5V

 

 

 

 

 

 

 

 

 

 

 

 

CIN = COUT = 1uF, X7R

 

 

 

 

0

 

 

 

 

 

 

(dB)

-20

 

 

 

 

 

 

 

 

 

 

 

 

 

PSRR

-40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ILOAD = 100mA

 

 

 

 

 

-60

 

 

 

 

 

 

 

 

ILOAD = 10mA

 

 

 

 

 

-80

010. 1

100.1

1K

10K

100K

1M

 

 

 

 

1000

Frequency (kHz)

www.richtek.com

DS9198/A-14 April 2011

6

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