GS GS2615L, GS2615L25, GS2615L30, GS2615L33, GS2615L50 Schematic [ru]

150mA Low-Noise Ultra Low-Dropout Regulator

Product Description Features

The GS2615 is a 150 mA, fixed-output and
adjustable voltage regulator designed to provide
ultra low-dropout and low noise in battery powered
applications.
Using an optimized VIP
PNP) process, the GS2615 delivers unequalled
performance in all specifications critical to
battery-powered designs:
Dropout Voltage: Typically 300 mV @ 150 mA
load, and7 mV @ 1 mA load.
Ground Pin Current: Typically 850 μA @ 150 mA
load, and75 μA @ 1 mA load.
Enhanced Stability: The GS2615 is stable with
output capacitor ESR as low as 5 mΩ, which
allows the use of ceramic capacitors on the output.
Sleep Mode: Less than 1 μA quiescent current
when ON/ OFF pin is pulled low.
Smallest Possible Size: SOT-23-5L and micro
SMD packages use absolute minimum board
space.
Precision Output: 1% tolerance output voltages
available.
Low Noise: By adding a 10 nF bypass capacitor,
output noise can be reduced to 30 μV (typical).
Multiple voltage options, from 2.5V to 5.0V, are
available as standard products. Consult factory for
custom voltages.

TM

(Vertically Integrated

Block Diagram

 Ultra low dropout voltage
 Guaranteed 150 mA output current
 Smallest possible size (SOT-23-5L, micro

SMD package)

 Requires minimum external components
 Stable with low-ESR output capacitor
 <1 μA quiescent current when shut down
 Low ground pin current at all loads
 Output voltage accuracy 1%
 High peak current capability
 Wide supply voltage range (20V max)
 Low Z
 Over temperature/over current protection
 −40°C to +125°C junction temperature range
 Custom voltages available

: 0.3Ω typical (10 Hz to 1 MHz)

OUT

Applications

 Cellular Phone
 Palmtop/Laptop Computer
 Personal Digital Assistant (PDA)
 Camcorder, Personal Stereo, Camera

GS2615

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Packages & Pin Assignments

GS2615

(SOT-25)

GS2615-XX

(FIX)

Pin #

1 1 IN Supply Input
2 2 GND Ground

3 3 EN

4 - BYP

- 4 ADJ

5 5 OUT Regulator Output

Ordering Information

GS2615

(ADJ)

Pin #

Pin

Name

Pin Function

Enable/Shutdown:
CMOS compatible input. Logic high = enable,
logic low or open = shutdown.

Reference Bypass:
Connect external 470pF capacitor to GND to
reduce output noise. May be left open.

Adjustable regulator feedback input. Connect
to resistor voltage divider.

*For other voltages, please contact factory.

Marking Information

Part Number Marking Output

GS2615L BBA
GS2615L25
GS2615L30
GS2615L33
GS2615L50

BBH
BBQ
BBR
BBV

ADJ

WYG

WYG

WYG

WYG

WYG

2.5V

3.0V

3.3V

5.0V

GS2615

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Absolute Maximum Ratings (T

Symbol

=25°C Note1)

A

Parameter

Ratings Units

VIN Input Supply Voltage (survival) -0.6~+20 V

V

Input Supply Voltage (operating) 2.5~+20 V

INOP

ESD

PD

VO

IO I

V

IN-OUT

ESD Rating (Note 2)
Power dissipation (Note 3)
Output voltage (survival) (Note 4)

(survival) Short circuit protected

OUT

Input-Output voltage (survival) (Note 5)

2 kV

Internally limited

-0.3~+9 V

-0.3~+20 V

TOP Operating Temperature -40~+125 °C

T

Storage Temperature -65~+150 °C

STG

T

Lead Temp. (soldering, 5 sec.) 260 °C

LEAD

Electrical Characteristics(Fixed)

(unless otherwise specified: T
otherwise specified: V

IN

Symbol Parameter Condition Min Typ Max Unit

ΔVO Output voltage tolerance

Output voltage line
regulation

= 25°C. and limits in boldface type apply over the full operating temperature range. Unless

J

= VO(NOM) + 1V, I

= 1 mA, C

L

= 1 μF, C

IN

= 4.7 μF, V

OUT

ON/OFF

= 2V. )

IL=1mA -1.5 1.5

1mA ≤ I

1mA ≤ I

≤ 50mA

L

≤ 150mA

L

VO(NOM)+1V ≤ V

IL=0

≤ 20V

IN

-2.5 2.5

-3.5 3.5

-3.0 3.0

-4.0 4.0

0.007 0.014

0.032
1 3

5
7 10

IL=1mA

15

%V

NOM

%V

VIN-VO

V

ON/OFF

I

ON/OFF

I

GND

Dropout voltage (Note 7)

ON/OFF input voltage
(Note 8)

ON/OFF input current

Ground pin current

IL=10mA

40 60
90

IL=50mA

120 150
225

IL=150mA

280 350
575

High=O/P ON 1.4 1.6

Low=O/P OFF 0.15 0.55

V

=0V -2 0.01

ON/OFF

V

=5V 5 15

ON/OFF

IL=0

65 95
125

IL=1mA

75 110
170

=10mA

I

L

120 220
400

mV

V

µA

µA

GS2615

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Electrical Characteristics (Fixed Continue)

(unless otherwise specified: T
otherwise specified: V

IN

Symbol Parameter Condition Min Typ Max Unit

I

Ground pin current

GND

en

Output noise
voltage(RMS)

= 25°C. and limits in boldface type apply over the full operating temperature range. Unless

J

= VO(NOM) + 1V, I

= 1 mA, C

L

= 1 μF, C

IN

= 4.7 μF, V

OUT

IL=50mA

= 2V. )

ON/OFF

350 600
1000

IL=150mA

850 1500
2500

V

V

< 0.3V 0.01 0.8

ON/OFF

< 0.15V 0.05 2

ON/OFF

BW=300Hz to 50kHz

C

C

BYPASS

OUT

=10μF

=10nF

30 µV

µA

Ripple rejection

Io(SC) Short circuit current

Io(PK) Peak output current V

f=1kHz, C

C

BYPASS

=0(steady state)

R

L

(Note 9)

≥ VO(NOM)-5% 350 mA

OUT

=10μF

OUT

=10nF

45 dB

400 mA

Electrical Characteristics (Adjustable)

Symbol Parameter Condition Min Typ Max Unit

VO Output voltage IL=1mA

∆ VO /∆T

Output Voltage
temperature Coefficient

Output voltage line
regulation

V

+1V ≤ VIN ≤ 20V 0.007

O(NOM)

IL=1mA

40 ppm/ºC

IL=0

-1 0 1

-2 2

0.014

0.032

1 3

5

7 10

15

%V

%/V

NOM

V

IN -VO

Dropout voltage (Note 7)

IL=10mA

IL=50mA

I

=150mA

L

V

ON/OFF

I

ON/OFF

I

GND

ON/OFF input voltage

(Note 8)

ON/OFF input current

Ground pin current IL=0

High=O/P ON 1.4 1.6

Low=O/P OFF 0.15 0.55

V

=0V -2 0.01

ON/OFF

V

=5V 5 15

ON/OFF

40 60

90

120 150

225

280 350

575

65 95

125

mV

V

µA

µA

GS2615

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Electrical Characteristics (Adjustable Continue)

Symbol Parameter Condition Min Typ Max Unit

75 110
170
120 220
400
350 600
1000
850 1500
2500

50 µV

I

Ground pin current

GND

en

Output noise
voltage(RMS)

IL=1mA

IL=10mA

IL=50mA

IL=150mA

V

V

< 0.3V 0.01 0.8

ON/OFF

< 0.15V 0.05 2

ON/OFF

BW=300Hz to 50kHz

=10μF

C

OUT

BYPASS

=10nF

C

Ripple rejection

Io(SC) Short circuit current

Io(PK) Peak output current V

Note 1:

“Absolute Maximum Ratings” indicate limits beyond which damage to the component may occur.
Electrical specifications do not apply when operating the device outside of its rated operating
conditions.

Note 2:

The ESD rating of pins 3 and 4 for the SOT-23-5L package, or pins 5 and 2 for the micro SMD
package, is 1 kV.

Note 3:

The maximum allowable power dissipation is a function of the maximum junction temperature,
T

(MAX), the junction-to-ambient thermal resistance, Θ

J

maximum allowable power dissipation at any ambient temperature is calculated using:

Where the value of Θ

for the SOT-23-5L package is 220°C/W in a typical PC board mounting and

J-A

the micro SMD package is 225°C/W. Exceeding the maximum allowable dissipation will cause
excessive die temperature, and the regulator will go into thermal shutdown.

Note 4:

If used in a dual-supply system where the regulator load is returned to a negative supply, the
GS2615 output must be diode-clamped to ground.

Note 5:

The output PNP structure contains a diode between the V
reverse-biased. Reversing the polarity from V

Note 6:

Limits are 100% production tested at 25°C. Limits over the operating temperature range are
guaranteed through correlation using Statistical Quality Control (SQC) methods. The limits are used
to calculate National’s Average Outgoing Quality Level (AOQL).

Note 7:

Dropout voltage is defined as the input to output differential at which the output voltage drops 100
mV below the value measured with a 1V differential.

Note 8:

The ON/OFF input must be properly driven to prevent possible mis-operation. For details , refer to
Application Hints.

Note 9:

The GS2615 has foldback current limiting which allows a high peak current when V
then reduces the maximum output current as V
Characteristics curves).

Note 10:

Exposing the micro SMD device to direct sunlight will cause mis-operation. See Application Hints for
additional information.

f=1kHz, C

C

BYPASS

=0(steady state)

R

L

(Note 9)

≥ Vo(NOM)-5% 350 mA

OUT

=10μF

OUT

=10nF

to V

IN

OUT

40 dB

400 mA

, and the ambient temperature, TA. The

J-A

to V

IN

will turn on this diode.

OUT

is forced to ground (see Typical Performance

terminals that is normally

OUT

OUT

> 0.5V, and

GS2615

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Application Summary

EXTERNAL CAPACITORS

Like any low-dropout regulator, the GS2615 requires external capacitors for regulator stability. These capac itors
must be correctly selected for good performance.

Input Capacitor

An input capacitor whose capacitance is ≥ 1 μF is required between the GS2615 input and ground (the amount of
capacitance may be increased without limit).This capacitor must be located a distance of not more than 1 cm from
the input pin and returned to a clean analog ground. Any good qua lity ceramic, tantal um, or film capacit or may be
used at the input.

Important:

impedance source of power (like a battery or very large c apacitor). If a Tantalum capaci tor is used at the input, it
must be guaranteed by the manufacturer to have a surge current rating sufficient for the application.
There are no requirements for ESR on the input capacitor, but tolerance and tem perature coefficient must be
considered when selecting the capacitor to ensure the capacitance will be ≥ 1 μF over the entire operating
temperature range.

Output Capacitor

The GS2615 is designed specifically to work with ceramic output capacitors, utilizing circuitry which allows the
regulator to be stable across the entire range of output current with an output capacitor whose ESR is as lo w as 5
mΩ. It may also be possible to use.
Tantalum or film capacitors at the output, but these are not as attractive for reasons of size and c ost (see next
section Capacitor Characteristics).The output capacitor must meet the requirement for minimum amount of
capacitance and also have an ESR (equivalent series resistance) value which is within the stable range. Curves
are provided which show the stable ESR range as a function of load current (see ESR graph below).

Tantalum capacitors can suffer catastrophic failure due to surge current when conn ected to a low

Important:The output capacitor must maintain its ESR within the stable region over the full operating temperature

range of the application to assure stability.
The GS2615 requires a minimum of 2.2 μF on the output (output capacitor size can be increased without limit).
It is important to remember that capacitor tolerance and variation with temperature must be taken into
consideration when selecting an output capacitor so that the minimum requir ed amount of output capacitance is
provided over the full operating temperature range. It should be noted that ceramic capacitors can exhibit large
changes in capacitance with temperature (see next section, Capacitor Characteristics).
The output capacitor must be located not more than 1 cm from the output pin and returned to a clean analog
ground.

Noise Bypass Capacitor

Connecting a 10 nF capacitor to the Bypass pin significantly reduces noise on the regulator output. It should be
noted that the capacitor is connected directly to a high-impedance circuit in the band gap reference.
Because this circuit has only a few microamperes flowing in it, any si gnificant loading on this node will cause a
change in the regulated output voltage. For this reason, DC leakage curr ent through the noise bypass capacitor

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GS2615

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