Richtek RT9170-12GV, RT9170-12PB, RT9170-14GV, RT9170-15PB, RT9170-18GV Schematic [ru]

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RT9170

300mA CMOS LDO Regulator

General Description

The RT9170 is CMOS ultra low quiescent current and low dropout (ULDO) regulators. The devices are capable of supplying 300mA of output current continuously.

The RT9170's performance is optimized for batterypowered systems to deliver 15uA ultra low quiescent current and extremely low dropout voltage. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio.

The devices are available in fixed output voltages range of 1.2V to 3.3V with 0.1V per step. The RT9170 regulators are available in SOT-23-3, SOT-23-5 and 3-lead SOT-89 packages.

Ordering Information

RT9170-

Package Type

V: SOT-23-3

B: SOT-23-5

X : SOT-89

Lead Plating System P : Pb Free

G : Green (Halogen Free and Pb Free)

Output Voltage 12 : 1.2V

13 : 1.3V

:

32 : 3.2V

33 : 3.3V

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.

with 15μA Quiescent Current

Features

zUltra-Low Quiescent Current (Typically 15uA)

zGuaranteed 300mA Output Current

zLow Dropout : 240mV at 300mA

zWide Operating Voltage Ranges : 2V to 5.5V

zFast Transient Response

zTight Load and Line Regulation

zTTL-Logic-Controlled Enable Input

zCurrent Limiting & Thermal Protection

zOnly 1uF Output Capacitor Required for Stability

zHigh Power Supply Rejection Ratio

zCustom Voltage Available

zRoHS Compliant and 100% Lead (Pb)-Free

Applications

zCellular Phones and Pagers

zBattery-Powered Equipment

zLaptop, Palmtops, Notebook Computers

zHand-Held Instruments

zPCMCIA Cards

Pin Configurations

(TOP VIEW)

 

 

VIN

 

EN

 

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

5

 

 

 

4

 

 

2

 

 

2

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND VOUT

GND VIN VOUT

 

SOT-23-3

 

SOT-23-5

1

2

3

Marking Information

GND

VIN

VOUT

(TAB)

For marking information, contact our sales representative

 

SOT-89

 

 

 

 

directly or through a Richtek distributor located in your

 

 

 

area.

 

 

 

DS9170-14 April 2011

www.richtek.com

 

1

RT9170

Typical Application Circuit

VIN

VIN

VOUT

VOUT

CIN

RT9170-

xB

COUT

1uF

1uF

Chip Enable

EN GND

 

 

Functional Pin Description

 

Pin No.

 

 

Pin Name

Pin Function

SOT-23-3

SOT-23-5

SOT-89

 

 

 

 

 

 

 

 

 

 

 

 

3

2

2

VIN

Power Input Voltage.

2

3

3

VOUT

Output Voltage.

1

1

1

GND

Ground.

-

5

-

 

 

 

Chip Enable (Active Low).

 

EN

-

4

-

NC

No Internal Connection.

 

 

 

 

 

 

 

Function Block Diagram

 

VIN

+

Current Limit

&

-

Thermal Shutdown

EN

VOUT

 

 

GND

www.richtek.com

DS9170-14 April 2011

2

 

 

 

 

 

 

 

 

 

 

 

RT9170

Absolute Maximum Ratings (Note 1)

 

 

 

 

 

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

 

 

 

 

 

7V

 

 

z Power Dissipation, PD @ TA = 25°C

 

 

 

 

 

 

 

 

 

 

SOT-23-3---------------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

0.4W

 

 

SOT-23-5---------------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

0.4W

 

 

SOT-89 -----------------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

0.571W

 

z Package Thermal Resistance (Note 2)

 

 

 

 

 

 

 

 

 

SOT-23-3, θJA ---------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

250°C/W

 

 

SOT-23-5, θJA ---------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

250°C/W

 

 

SOT-89, θJA -----------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

175°C/W

 

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

 

 

 

 

 

150°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 ------------------------------------------------------------------------------------------------

 

 

 

 

 

2V to 5.5V

 

z Enable Input Voltage ------------------------------------------------------------------------------------------------

 

 

 

 

 

0V to 5.5V

 

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

 

 

 

 

 

40°C to 125°C

Electrical Characteristics

 

 

 

 

 

 

 

 

(VIN = VOUT + 1V, CIN = COUT = 1uF, 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

300

--

 

--

mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quiescent Current

(Note 5)

IQ

V

 

≤ 0.6V, IOUT = 0mA

--

15

 

--

μA

EN

 

Dropout Voltage

 

 

VDROP

IOUT = 300mA

--

240

 

--

mV

Line Regulation

 

 

VLINE

VIN = (VOUT + 0.3V) to 5.5V,

−0.3

0.018

 

+0.3

%/V

 

 

IOUT = 1mA

 

 

 

 

 

 

 

 

 

 

 

 

 

Load Regulation

 

(Note 6)

VLOAD

1mA < IOUT < 300mA

--

0.01

 

0.04

%/mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standby Current

 

(Note 7)

ISTBY

V

 

≥ 2V (Shutdown), VIN = 5.5V

--

0.1

 

--

μA

 

EN

 

 

 

 

 

Logic-Low Voltage

VIL

VIN = 2V to 5.5V, Enable

--

--

 

0.6

 

 

EN Threshold

 

 

V

 

Logic-High Voltage

VIH

VIN = 2V to 5.5V, Shutdown

2

--

 

--

 

 

 

 

 

Power Supply Rejection

PSRR

f = 1kHz, COUT = 1μF

--

−40

 

--

dB

Thermal Shutdown Temperature

TSD

 

 

 

--

150

 

--

°

 

 

 

 

 

 

 

 

 

 

 

 

 

C

DS9170-14 April 2011

www.richtek.com

 

3

RT9170

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 thermal conductivity test board of JEDEC 51-3 thermal measurement standard.

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. 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). The total current drawn from the supply is the sum of the load current plus the ground pin current.

Note 6. Regulation is measured at constant junction temperature by using a 20ms current pulse. Devices are tested for load regulation in the load range from 1mA to 300mA.

Note 7. Standby current is the input current drawn by a regulator when the output voltage is disabled by a shutdown signal (VEN 2V). It is measured with VIN = 5.5V.

www.richtek.com

DS9170-14 April 2011

4

 

Richtek RT9170-12GV, RT9170-12PB, RT9170-14GV, RT9170-15PB, RT9170-18GV Schematic

RT9170

Typical Operating Characteristics

 

2.55

 

 

Temperature

Stability

 

 

 

 

 

 

 

 

 

 

 

 

 

2.53

 

 

 

 

 

No Load

 

 

 

 

 

 

 

 

 

 

 

 

2.51

 

 

 

 

 

 

 

 

 

(V)

2.49

 

 

 

 

ILOAD = 250mA

 

 

 

 

 

 

 

 

 

Voltage

2.47

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.45

 

 

 

 

 

 

 

 

 

2.43

 

 

 

 

 

 

 

 

 

Output

 

 

 

 

 

 

 

 

 

2.41

VIN = 3.5V

 

 

 

 

 

 

 

2.39

VOUT = 2.5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.37

CIN = 1uF (Ceramic)

 

 

 

 

 

 

COUT = 1uF (Ceramic)

 

 

 

 

 

 

2.35

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-35

-15

5

25

45

65

85

105

125

Quiescent Current vs. Load Current

 

18

 

 

 

 

 

 

 

17

 

 

 

 

 

 

(uA)

16

 

 

 

 

 

 

 

 

 

 

 

 

 

Current

15

 

 

 

 

 

 

14

 

 

 

 

 

 

Quiescent

13

 

 

 

 

 

 

12

VIN = 3.5V

 

 

 

 

 

VOUT = 2.5V

 

 

 

 

 

 

 

 

 

 

 

 

11

CIN = 1uF (Ceramic)

 

 

 

 

 

10

COUT = 1uF (Ceramic)

 

 

 

 

 

 

 

 

 

 

 

 

0

0.05

0.1

0.15

0.2

0.25

0.3

Temperature (°C)

Load Current (A)

Quiescent Current vs. Temperature

Quiescent Current vs. Supply Voltage

 

18

 

 

 

 

 

 

 

 

 

 

16

 

ILOAD = 200mA

 

 

 

 

 

(uA)

14

 

 

 

 

 

 

 

 

 

12

 

 

No Load

 

 

 

 

 

Current

 

 

 

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

Quiescent

 

 

 

 

 

 

 

 

 

6

VIN = 3.5V

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

VOUT = 2.5V

 

 

 

 

 

 

 

CIN = 1uF (Ceramic)

 

 

 

 

 

 

2

 

 

 

 

 

 

0

COUT = 1uF (Ceramic)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-35

-15

5

25

45

65

85

105

125

 

18

 

 

 

 

 

 

 

 

16

 

 

 

 

 

 

 

(uA)

14

 

 

 

 

 

 

 

12

 

 

 

 

No Load

 

 

Current

 

 

 

 

 

 

10

ILOAD = 200mA

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

Quiescent

 

 

 

 

 

 

 

6

 

 

 

 

 

 

 

4

VOUT = 2.5V

 

 

 

 

 

 

 

CIN = 1uF (Ceramic)

 

 

 

 

 

 

2

 

 

 

 

 

 

COUT = 1uF (Ceramic)

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

2

2.5

3

3.5

4

4.5

5

5.5

Temperature(°C)

Supply Voltage (V)

Dropout Voltage vs. Load Current

 

300

VOUT = 3.3V

 

 

 

 

 

2.55

 

 

 

 

 

 

 

(mV)

250

 

 

 

TJ = 125°C

 

2.53

 

 

 

 

 

 

 

 

 

(V)

 

200

 

 

 

 

 

 

Dropout Voltage

 

 

TJ = 25°C

 

Output Voltage

2.51

 

 

 

 

150

 

 

 

 

 

 

 

 

 

 

 

TJ = -40°C

2.49

100

 

 

 

 

 

50

 

 

 

 

 

2.47

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

2.45

 

0

0.05

0.1

0.15

0.2

0.25

0.3

 

Output Voltage vs. Supply Voltage

VOUT = 2.5V

CIN = 1uF (Ceramic)

COUT = 1uF (Ceramic)

ILOAD = 1mA

2.5

3

3.5

4

4.5

5

5.5

Load Current (A)

Supply Voltage (V)

 

 

DS9170-14 April 2011

www.richtek.com

 

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