FP6142-25S5P [FITIPOWER]

500mA Low Noise LDO with Soft-Start and Output Discharge Function;


型号：	FP6142-25S5P
厂家：	Fitipower
描述：	500mA Low Noise LDO with Soft-Start and Output Discharge Function
文件：	总10页 (文件大小：488K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

fitipower integrated technology lnc.

FP6142

500mA Low Noise LDO with

Soft-Start and Output Discharge Function

Description

Features

The FP6142 is a family of CMOS low dropout (LDO)

regulators with a low dropout voltage of 250mV at

500mA designed for noise-sensitive portable device,

RF and wireless applications. Quiescent current of

FP6142 is as low as 50μA and it works with low-ESR

ceramic capacitors, which makes it very suitable for

space sensitive handheld applications. The soft-start

function will eliminate current surges during start-up

and the output discharge function will dissipate the

residue output voltage in the capacitor during

shut-down.

 Ultra-Low Dropout Voltage of 250mV at 500mA

 Wide Operating Voltage Ranges from 2.2V to

5.5V

 Low Quiescent Current at 50μA

 Programmable Soft Start

 5mA Discharge Current of V_OUTwhen IC

Shutdown

 Low Output Noise

 Fast Response in Line/Load Transient

 Current Limit Protection

 Thermal Shutdown Protection

 1µF Output Capacitor Required for Stability

 RoHS Compliant

Other features include current limit, thermal protection,

high output accuracy, and low noise output etc..

The FP6142 is available in both SOT-23-5 and

SC-70-5 packages.

Applications

 Digital Still Camera

 CDMA/GSM Cellular-Handset

 Portable Information Appliance

 Laptop, Palmtop and Notebook Computer

 Mini PCI, PCI-Express and PCMCIA Card

Pin Assignments

Ordering Information

FP6142-□□□□

S5 Package (SOT-23-5)

TR: Tape/Reel

VOUT

P: Green

G: Green

Package Type

S5: SOT-23-5

C5: SC-70-5

VIN GND EN

Output Voltage

C5 Package (SC-70-5)

15: 1.5V

18: 1.8V

25: 2.5V

28: 2.8V

30: 3.0V

31: 3.1V

33: 3.3V

VOUT

Note: Please consult Fitipower sales office or

authorized distributors for availability of special

output voltages.

VIN GND EN

Figure 1. FP6142 Pin Assignments

FP6142-1.5-MAY-2013

fitipower integrated technology lnc.

FP6142

SOT-23-5 Marking

Part Number

SC-70-5 Marking

Part Number

Product

Code

Product

Code

Product

Code

Product

Code

Part Number

FP6142-15S5P

FP6142-15S5G

FP6142-18S5P

FP6142-18S5G

FP6142-25S5P

FP6142-25S5G

FP6142-28S5P

FP6142-28S5G

FP6142-30S5P

FP6142-30S5G

FP6142-31S5P

FP6142-31S5G

FP6142-33S5P

FP6142-33S5G

v0=

FP6142-15C5P

FP6142-15C5G

FP6142-18C5P

FP6142-18C5G

FP6142-25C5P

FP6142-25C5G

Dm=

FP6142-28C5G

FP6142-30C5P

FP6142-30C5G

FP6142-31C5P

FP6142-31C5G

FP6142-33C5G

x0=

Da=

De=

Ds=

Db=

Dn=

Df=

Dt=

z0=

Dd=

Dr=

w0=

Typical Application Circuit

V_IN

V_OUT

VIN

VOUT

C_IN

1µF/X7R

C_OUT

1µF/X7R

FP6142

Chip Enable

C_SS

0.5nF

GND

Figure 2. Typical Application Circuit for FP6142

Note 1：To prevent oscillation, it is recommended to use minimum 1µF X7R or X5R dielectric capacitors if ceramics are

used as input/output capacitors.

Functional Pin Description

Pin Name

Pin No.

Pin Function

VIN

Supply Voltage.

Ground.

GND

Chip Enable Control Input. Pull the pin high to enable IC, and pull low or keep it floating to disable the

device.

Soft Start Pin.

LDO Output.

VOUT

FP6142-1.5-MAY-2013

fitipower integrated technology lnc.

FP6142

Block Diagram

RSEN

PMOS

VIN

VOUT

Current

Limit

Error

Amp

Power

Shutdown

Thermal

Shutdown

Vref

GND

Figure 3. Block Diagram of FP6142

Absolute Maximum Ratings

● VIN, EN, SS to GND --------------------------------------------------------------------------------------------- +6V

● Power Dissipation @25°C, (P_D)

SOT-23-5 ----------------------------------------------------------------------------------------------- +0.4W

SC-70-5 ------------------------------------------------------------------------------------------------- +0.3W

● Package Thermal Resistance, (θ_JA)

SOT-23-5 ----------------------------------------------------------------------------------------------- +250°C/W

SC-70-5 ------------------------------------------------------------------------------------------------- +333°C/W

● Maximum Junction Temperature ----------------------------------------------------------------------------- +150°C

● Storage Temperature Range (T_STG) ------------------------------------------------------------------------- -65°C to +150°C

● Lead Temperature (Soldering, 10sec) ---------------------------------------------------------------------- +260°C

Note 2：Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device.

Recommended Operating Conditions

● Supply Voltage (V_IN) -------------------------------------------------------------------------------------------- +2.2V to +5.5V

● Operating Temperature Range ------------------------------------------------------------------------------- -40°C to +85°C

FP6142-1.5-MAY-2013

fitipower integrated technology lnc.

FP6142

Electrical Characteristics

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

Parameter

Input Voltage Range

Output Voltage Accuracy

Quiescent Current

Standby Current

Symbol

V_IN

Conditions

Min

2.2

-2

Typ.

Max

5.5

Unit

ΔV_OUT

I_Q

I_STBY

I_LIM

I_L= 10mA

V_EN=5V, I_OUT=0mA

V_EN=0V

0.7

0.8

μA

1.5

R_LOAD=0Ω, 2.7V≦V_IN≦5.5V

Current Limit

0.5

V_OUT=1.5V

V_OUT=1.8V

360

280

150

140

430

340

180

165

V_OUT=2.5V

V_OUT=3.0V

V_OUT=3.3V

I_O=250mA

120

700

550

290

145

840

660

350

Dropout Voltage (Note3)

V_DROP

V_OUT=1.5V

V_OUT=1.8V

V_OUT=2.5V

I_O=500mA

V_OUT=3.0V

V_OUT=3.3V

270

240

320

290

1mA< I_OUT< 500mA, 2.7V≦V_IN≦5.5V

C_SS=1nF, C_OUT=1μF

Output on

Load Regulation (Note4)

Soft Start Time

ΔV_LOAD

0.7

1.5

0.1

EN Threshold

Output off

0.6

Enable Pin Current

I_EN

μA

Output Noise Voltage (Note5)

V_ON

C_OUT=1μF, I_OUT=0mA, C_SS=1nF

μV_RMS

Power

Rejection (Note5)

Supply

Ripple

PSRR

ΔV_LINE

T_SD

I_OUT=10mA, f =10kHz

0.01

170

Line Regulation

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

0.2

%/V

Thermal Shutdown Threshold

(Note5)

°C

△

Hysteresis

TSD

Note 3：The dropout voltage is defined as VIN-VOUT, which is measured when VOUT drops 2% of its normal value with the specified

output current.

Note 4：Load regulation and dropout voltage are measured at a constant junction temperature by using a 40ms low duty cycle current

pulse.

Note 5：Guarantee by design.

FP6142-1.5-MAY-2013

fitipower integrated technology lnc.

FP6142

Typical Performance Curves

3.40

3.30

3.20

3.10

3.00

2.90

2.80

V_IN=2.3V, V_OUT=1.8V

V_IN=V_EN=3.6V, V_OUT=3.1V

-50

-25

100 125

Temperature (^oC)

-25

100 125

Temperature (^oC)

Figure 4. Output Voltage vs. Temperature

Figure 5. Quiescent Current vs. Temperature

300

V_IN=V_EN=3.6V, V_OUT=3.1V

250

200

150

100

T_J=125^oC

T_J=25^oC

T_J=- 40^oC

100

200

300

400

500

Css (nF)

Load Current (mA)

Figure 6. Dropout Voltage vs. Load Current

Figure 7. Soft Start Time vs. SS capacitance

V_IN=V_EN=2.3V, V_OUT=1.8V, I_LOAD=1mA to 500mA

V_IN=V_EN=2.3V, V_OUT=1.8V, I_LOAD=1mA to 300mA

V_OUT

I_OUT

Figure 8. Load Transient Response

Figure 9. Load Transient Response

FP6142-1.5-MAY-2013

fitipower integrated technology lnc.

FP6142

Typical Performance Curves (Continued)

V_IN=3.6V to 4.6V, V_OUT=3.1V, I_LOAD=1mA

V_IN=3.6V to5.5V, V_OUT=3.1V, I_LOAD=1mA

V_OUT

V_IN

Figure 10. Line Transient Response

Figure 11. Line Transient Response

V_IN=V_EN=3.6V, C_SS=22nF, No Load

V_IN=V_EN=3.6V, No Load

V_OUT

I_IN

Figure 12. Start-up Response

Figure 13. EN Shutdown Response

FP6142-1.5-MAY-2013

fitipower integrated technology lnc.

FP6142

Applications Information

Current Limit

The FP6142 is

low-noise, low-dropout,

low-quiescent current linear regulator designed for

space-restricted applications. These devices can

supply loads up to 500mA. As shown in the block

diagram, the FP6142 consists of a highly accurate

band gap core, noise bypass circuit, error amplifier,

P-channel pass transistor, soft start, fast discharge

and an internal feedback voltage divider. The band

gap reference is connected to the error amplifier’s

inverting input. The error amplifier compares this

reference with the feedback voltage and amplifies

the difference. If the feedback voltage is lower than

the reference voltage, the pass transistor gate will be

pulled low. This allows more current to pass to the

output and increases the output voltage. If the

feedback voltage is too high, the pass transistor gate

will be pulled high, allowing less current to pass to

the output. The output voltage is feedback through

an internal resistor voltage divider connected to the

VOUT pin. Additional blocks include a current limit,

over temperature protection and shutdown logic.

Besides, current limit and on chip thermal shutdown

features provide protection against any combination

of over-load or ambient temperature that could cause

junction temperature exceeding maximum rating.

The FP6142 includes a current limit. It monitors

the output current and controls the pass

transistor’s gate voltage to limit the output current

under 800mA (typ). The output can be shorted to

ground for an indefinite amount of time without

damaging the part.

Quick Discharge

The FP6142 has built-in a quick discharge circuitry

to protect system function correct operation. This

discharge block discharges output capacitor

quickly to avoid low output voltage level to affect

system’s MCU abnormal work when IC is power off

or enable pin pulls down.

Dropout Voltage

The minimum dropout voltage of LDO determines

the lowest usable supply voltage.

battery-powered systems, this determines the

useful end-of-life battery voltage. Because the

FP6142 uses

P-channel MOSFET pass

transistor, its dropout voltage is a function of

drain-to-source on resistance (R_DS-ON) multiplied by

the load current

Output and Input Capacitor

Over Temperature Protection

The FP6142 regulator is designed to be stable with a

wide range of output capacitors. The ESR of the

output capacitor affects stability. Larger value of the

output capacitor decreases the peak deviations and

improves transition response for larger current

changes.

Over temperature protection limits total power

dissipation in the FP6142. When the junction

temperature exceeds T_J=+170C, the thermal

sensor will signal the shutdown logic and turn off

the pass transistor. The thermal sensor will turn

the pass transistor on again after the IC’s junction

temperature drops 30C, resulting in a pulsed

The capacitor types (aluminum, ceramic and

tantalum) have different characterizations, such as

temperature and voltage coefficients. All ceramic

capacitors were manufactured with a variety of

dielectrics, each with different behavior across

temperature and applications. Common dielectrics

used are X5R, X7R and Y5V. It is recommended to

use 1.0µF to 4.7µF X5R or X7R dielectric ceramic

capacitors with 10mΩ to 30mΩ ESR range between

device outputs to ground for transient stability. The

FP6142 is designed to be stable with low ESR

ceramic capacitors and higher values of capacitors,

and ESR could improve output stability. The ESR of

output capacitor is very important because it

generates a zero to provide phase lead for loop

stability.

output

during continuous thermal-overload

conditions.

Thermal-Overload protection is design to protect

the FP6142 in the event of fault condition. For

continual operation, do not exceed the absolute

maximum junction temperature rating of

T_J=+150C.

Thermal Consideration

The power handling capability of the device will be

limited by maximum 125C operation junction

temperature.

The power dissipated by the

device will be estimated by P_D= I_OUT (V_IN-V_OUT).

The power dissipation should be lower than the

maximum power dissipation listed in “Absolute

Maximum Ratings” section.

There is no requirement for the ESR on the input

capacitor, but its voltage and temperature coefficient

have to be considered for device application

environment.

FP6142-1.5-MAY-2013

fitipower integrated technology lnc.

FP6142

Applications Information (Continued)

Soft Start Capacitor

The SS pin connecting a 0.5nF capacitor could

suppress inrush current and get a gradual increase of

output voltage during power up. As the internal

constant current source charges the external

soft-start capacitor to compare with feedback voltage

to control gate voltage of pass transistor. Therefore,

output current increases from zero to the value

required for regulation. The maximum load current

will be available after the soft-start time is completed.

Active/Shutdown Input Operation

The FP6142 is turned off by pulling the EN pin low

and turned on by pulling it high. The enable input is

TTL/CMOS compatible threshold for simple logic

interfacing. If this feature is not used, the EN pin

should be connected to VIN to keep the regulator

output operating normally. It will become shutdown

with this pin floating because EN pin has built-in a

pull down resistor (refer to Block Diagram).

FP6142-1.5-MAY-2013

fitipower integrated technology lnc.

FP6142

Outline Information

SOT-23-5 Package (Unit: mm)

DIMENSION IN MILLIMETER

SYMBOLS

UNIT

MIN

0.90

0.00

0.90

0.30

2.80

2.60

1.50

0.90

1.80

0.30

MAX

1.45

0.15

1.30

0.50

3.00

1.70

1.00

2.00

0.60

Note：Followed From JEDEC MO-178-C.

Carrier Dimensions

FP6142-1.5-MAY-2013

fitipower integrated technology lnc.

FP6142

Outline Information (Continued)

SC-70-5 Package (Unit: mm)

DIMENSION IN MILLIMETER

SYMBOLS

UNIT

MIN

0.90

0.00

MAX

1.10

0.10

0.90

0.15

1.80

1.15

0.55

0.26

1.00

0.35

2.20

2.40

1.35

0.75

0.46

Carrier Dimensions

Life Support Policy

Fitipower’s products are not authorized for use as critical components in life support devices or other medical systems.

FP6142-1.5-MAY-2013

FP6142-25S5P [FITIPOWER]

相关型号：

SI9130DB

SI9135LG-T1

SI9135LG-T1-E3

SI9135_11

SI9136_11

SI9130CG-T1-E3

SI9130LG-T1-E3

SI9130_11

SI9137

SI9137DB

SI9137LG

SI9122E