Richtek RT9193T-18PQW, RT9193T-25PB, RT9193T-33PU5 Schematic [ru]

RT9193T

300mA, Thermal Folded Back CMOS LDO Regulator

General Description

The RT9193T is designed for portable RF and wireless

applications with demanding performance and space

requirements. The RT9193T performance is optimized for

battery-powered systems to deliver ultra low noise and

low quiescent current. A noise bypass pin is available for

further reduction of output noise. Regulator ground current

increases only slightly in dropout, further prolonging the

battery life. The RT9193T also works with low-ESR

ceramic capacitors, reducing the amount of board space

necessary for power applications, critical in hand-held

wireless devices. The RT9193T consumes less than 0.01μA

in shutdown mode and has fast turn-on time less than

50μs. RT9193T is short circuit thermal folded back

protected. RT9193T lowers its OTP trip point from 165°C

to 110°C when output short circuit occurs (V

OUT

< 0.4V)

providing maximum safety to end users. The other features

include ultra low dropout voltage, high output accuracy,

current limiting protection, and high ripple rejection ratio.

Available in the 5-lead of SC-70, SOT-23 and

WDFN-6L 2x2 packages.

Ordering Information

RT9193T-

Package Type
U5 : SC-70-5
B : SOT-23-5
QW : WDFN-6L 2x2 (W-Type)

Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)

Features

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Short Circuit Thermal Folded Back Protection

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z Ultra-Low-Noise for RF Application

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z Ultra-Fast Re spon se in Line/Loa d T ra n sient

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z Quick Start-Up (T ypically 50us)

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z < 0.01uA Standby Current When Shutdown

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z Low Dropout : 220mV @ 300mA

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z Wide Operating Voltage Ranges : 2.5V to 5.5V

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z TTL-Logic-Controlled Shutdown Input

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z Low Temperature Coefficient

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z Current Limiting Protection

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z Thermal Shutdown Protection

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z Only 1uF Output Capa citor Required f or Sta bility

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z High Power Supply Rejection Ratio

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z Custom Voltage Available

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z RoHS Compliant and 100% Lead (Pb)-Free

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Applications

z CDMA/GSM Cellular Handsets

z Battery-Powered Equipment

z Laptop, Palmtops, Notebook Computers

z Hand-Held Instruments

z PCMCIA Cards

z Portable Information Appliances

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

Output Voltage
15 : 1.5V
16 : 1.6V
:
34 : 3.4V
35 : 3.5V
1H : 1.85V
2H : 2.85V

Note :

Richtek products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

` Suitable for use in SnPb or Pb-free soldering processes.

Pin Configurations

(TOP VIEW)

1

EN

2

GND

3

WDFN-6L 2x2

VOUT BP

5

VIN GND EN

6

BP

5

NC

7

4

VOUTVIN

4

23

SC-70-5/SOT-23-5

DS9193T-06 April 2011 www.richtek.com

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RT9193T

Typical Application Circuit

V

IN

Chip Enable

Functional Pin Description

Pin Name

VIN

GND

EN

BP

VOUT

Pin Function

Power Input Voltage

Ground

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.

Reference Noise Bypass

Output Voltage

C
1uF

+

IN

RT9193T

VIN

GND

EN BP

VOUT

+

C

OUT

1uF

C

BP

22nF

V

OUT

Function Block Diagram

EN

Quick

Start

BP

V

REF

Shutdown

and

Logic Control

+

-

Error

Amplifier

VIN

MOSFET

Driver

VOUT

Current-Limit

and

Thermal

Protection

GND

DS9193T-06 April 2011www.richtek.com

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RT9193T

Absolute Maximum Ratings (Note 1)

z Supply Input Voltage ---------------------------------------------------------------------------------------------------- 6V

z Power Dissipation, P

SC-70-5 -------------------------------------------------------------------------------------------------------------------- 300mW

SOT-23-5------------------------------------------------------------------------------------------------------------------- 400mW

WDFN-6L 2x2 ------------------------------------------------------------------------------------------------------------- 606mW

z Package Thermal Resistance (Note 2)

SOT-70-5, θJA------------------------------------------------------------------------------------------------------------- 333°C/W

SOT-23-5, θJA------------------------------------------------------------------------------------------------------------- 250°C/W

WDFN-6L 2x2, θJA------------------------------------------------------------------------------------------------------- 165°C/W

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

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

@ T

D

= 25°C

A

−40°C to 85°C

−40°C to 125°C

Electrical Characteristics

(VIN = V

+ 1V, CIN = C

OUT

= 1uF, CBP = 22nF, T

OUT

Parameter Symbol Test Conditions Min Typ Max Unit

Output Voltage Accuracy ΔV

Current Limit I

Quiescent Current IQ V

Dropout Voltage (Note 5) V

Line Regulation ΔV

Load Regulation ΔV

Standby Current I

EN Input Bias Current I

Logic-Low Voltage

EN Threshold

Logic-High Voltage

Output Noise Voltage eNO

f = 100Hz -- −70 -- Power Supply

Rejection Rate

f = 10kHz

Thermal Shutdown Temperature TSD -- 165 -- °C

= 25°C, unless otherwise specified)

A

I

OUT

R

LIM

DROP

LINE

LOAD

VEN = GND, Shutdown -- 0.01 1 uA

STBY

VEN = GND or VIN -- 0 100 nA

IBSD

V

V

IL

V

VIN = 3V to 5.5V, Start-Up 1.2 -- --

IH

PSRR C

= 1mA −2 -- +2 %

OU T

= 1Ω 360 400 -- mA

LOAD

≥

1.2V, I

EN

I

= 200mA 170 200

OU T

I

= 300mA -- 220 300

OU T

V

= (V

IN

OUT

I

= 1mA

OU T

1mA < I

OUT

= 3V to 5.5V, Shutdown -- -- 0.4

IN

10Hz to 100kHz, I

= 1uF

C

OUT

= 1uF, I

OUT

= 0mA -- 90 130 μA

OUT

+ 0.3V) to 5.5V,

-- -- 0.3 %

< 300mA -- -- 0.6 %

= 200mA

OUT

OUT

= 10mA

-- 100 -- uV

-- −50 --

mV

V

RMS

dB

DS9193T-06 April 2011 www.richtek.com

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RT9193T

y

Parameter Symbol Test Conditions Min Typ Max Unit

Thermal Shutdown Temperature

H

steresis

ΔT

-- 30 -- °C

SD

Thermal Folded Back -- 110 -- °C

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. θ

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 V

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

JA

(Single Layer, 1S) of JEDEC 51-3 thermal measurement standard.

-V

IN

, which is measured when V

OUT

OUT

is V

OUT(NORMAL)

− 100mV.

DS9193T-06 April 2011www.richtek.com

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