LR1120G-40-AL5-R [UTC]

LOW DROPOUT, LOW NOISE ULTRA-FAST WITH REGULATOR;


型号：	LR1120G-40-AL5-R
厂家：	Unisonic Technologies
描述：	LOW DROPOUT, LOW NOISE ULTRA-FAST WITH REGULATOR
文件：	总4页 (文件大小：155K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

LR1120

Preliminary

CMOS IC

500mA, LOW DROPOUT, LOW

NOISE ULTRA-FAST WITH

SOFT START CMOS LDO

REGULATOR



DESCRIPTION

UTC LR1120, a 500mA LDO regulator, has very high PSRR and

super low dropout voltage especially suitable for wireless and

portable applications.

In the field of hand-held wireless devices, board space and

battery life are the main concerns of designers and end-users.

Because of the low quiescent current and low ESR ceramic

capacitors, UTC LR1120 can satisfy those concerns.

Furthermore, low current consumption in shutdown mode

(0.7μA), fast turn-on time (<70μs), high output accuracy, current

limiting protection, and high ripple rejection ratio are advantages of

UTC LR1120.



FEATURES

* Operating Voltage Ranges : 2.2V to 5.5V

* Dropout : 250mV at 500mA

* When IC Shutdown: 5mA Discharge Current of V_OUT

* Extreme Low Noise for DSC Application

* Extreme Fast Response in Line/Load Transient

* Internal Current Limiting Protection

* Internal Thermal Shutdown Protection

* High PSRR

* Recommended 1μF Output Capacitor only for Stability

* With TTL Logic Controlled Shutdown Input



ORDERING INFORMATION

Ordering Number

LR1120G-xx-AF5-x-R

LR1120G-xx-AL5-x-R

Package

SOT-25

SOT-353

Packing

Tape Reel

Note: xx: Output Voltage, refer to Marking Information.

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LR1120

Preliminary

CMOS IC



MARKING INFORMATION

PACKAGE

VOLTAGE CODE

18 :1.8V

MARKING

25 :2.5V

28 :2.8V

30: 3.0V

31 :3.1V

SOT-25

SOT-353

33 :3.3V

40 :4.0V



PIN DESCRIPTION

PIN CODE

NAME

DESCRIPTION

V_IN

Supply voltage input.

Ground.

GND

Input logic pin, active high for enabling the chip. When this pin goes to

a logic low, the chip will be shutdown.

Soft start pin.

V_OUT

Regulator output voltage pin.

4, 5

No Connection



BLOCK DIAGRAM

Current Limit

V_IN

V_REF

POR

OTP

MOS Driver

V_OUT

GND

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LR1120

Preliminary

CMOS IC



ABSOLUTE MAXIMUM RATING (T_A= 25°C, unless otherwise specified.)

PARAMETER

SYMBOL

V_IN

RATINGS

UNIT

Supply Input Voltage

EN Input Voltage

V_EN

SOT-25

0.38

Power Dissipation (T_A= 25°C)

P_D

SOT-353

0.25

Junction Temperature

Storage Temperature

T_J

150

°C

T_STG

-65~ +150

Note:Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.



THERMAL DATA

PARAMETER

SYMBOL

RATINGS

260

UNIT

°C/W

SOT-25

Junction to Ambient

θ_JA

SOT-353

400



OPERATING CONDITIONS

PARAMETER

SYMBOL

RATINGS

2.2 ~ 5.5

UNIT

Supply Input Voltage

Junction Temperature

Ambient Temperature

V_IN

T_J

-40 ~ +125

-40 ~ +85

°C

T_A

°C

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



ELECTRICAL CHARACTERISTICS

(V_IN= V_OUT+ 0.5V, V_EN= V_IN, C_IN= C_OUT= 1μF (Ceramic), T_A= 25°C, unless otherwise specified.)

PARAMETER

Input Voltage

SYMBOL

V_IN

TEST CONDITIONS

MIN TYP MAX UNIT

2.2

-2

5.5

Output Voltage Accuracy

∆V_OUT

I_OUT= 10mA

∆VOUT

∆VIN× VOUT

∆VOUT

VOUT

Line Regulation

V_IN= (V_OUT+0.5V) ~ 5.5V, I_OUT= 1mA

0.01 0.2 %/V

1mA<I_OUT<400mA, 2.2V≤V_IN<2.7V

1mA<I_OUT<500mA, 2.7 V≤V_IN≤5.5V

V_EN= 5V, I_OUT= 0mA

0.6

μA

Load Regulation (Note 1)

Quiescent Current (Note 2)

Standby Current

I_Q

1.5

I_STN-BY

V_EN= 0V

0.7

R_LOAD= 0Ω, 2.2V≤V_IN<2.7V

0.4

0.5

0.7 1.05

0.8 1.05

160 320

250 400

Current Limit

I_LIMIT

V_D

_LOAD= 0Ω, 2.7V≤V_IN≤5.5V

I_OUT= 400mA

_OUT= 500mA

Dropout Voltage (Note 3)

Soft Start Time

V_OUT= 2.5V, C_SS= 1nF, C_OUT= 1μF

0.7

Logic-Low

EN Threshold

V_IL

V_IH

0.6

5.5

Logic-High

1.6

0.1

Enable Pin Current

I_EN

170

μA

°C

Over Temperature Shutdown

Over Temperature Hysteresis

Power Supply Rejection Rate

Output Noise Voltage

OTS

OTH

PSRR

e_N

°C

I_OUT= 10mA, f = 10kHz

V_OUT=1.5V,C_OUT=1μF,I_OUT=0mA, C_SS= 1nF

μV_RMS

Notes: 1.Regulation is measured at constant junction temperature by using a 2ms current pulse. Devices are tested

for load regulation in the load range from 1mA to 500mA.

2.Quiescent, or ground current, is the difference between input and output currents. It is defined by I_Q= I_IN

I_OUTunder no load condition (I_OUT= 0mA). The total current drawn from the supply is the sum of the load

current plus the ground pin current.

3.The dropout voltage is defined as V_IN-V_OUT, which is measured when V_OUTis V_OUT(NORMAL)×98%.

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LR1120

Preliminary

CMOS IC



TYPICAL APPLICATION CIRCUIT

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

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