SGM2037_技术文档

SGM2037

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

GENERAL DESCRIPTION

FEATURES

The SGM2037 is a low noise, low dropout voltage

linear regulator which is designed using CMOS

technology. It provides 500mA output current capability.

The operating input voltage range is from 0.8V to 5.5V

and bias supply voltage range is from 2.5V to 5.5V. The

output voltage range is from 0.8V to 3.6V.

● 500mA Nominal Output Current

● Input Voltage Range: 0.8V to 5.5V

● Bias Voltage Range: 2.5V to 5.5V

● Fixed Output Voltages: 0.8V, 0.9V, 1.0V, 1.05V,

1.1V, 1.15V, 1.2V, 1.25V, 1.3V, 1.5V, 1.8V, 2.5V, 2.8V,

3.0V, 3.3V, and 3.6V

● Adjustable Output Voltage Range: 0.8V to 3.6V

● Output Voltage Accuracy: ±0.8% at +25℃

● Low Dropout Voltage: 120mV (TYP) at 500mA

● Very Low Bias Input Current: 37μA (TYP)

● Very Low Bias Input Current in Shutdown:

0.01μA (TYP)

Other features include logic-controlled shutdown mode,

short-circuit current limit and thermal shutdown

protection. The SGM2037 has automatic discharge

function to quickly discharge V_OUTin the disabled status.

The SGM2037 is suitable for applications which need

low noise, fast transient response and low I_Q

consumption, such as battery-powered equipment and

smartphones, etc.

● Low Noise: 25μV_RMS(TYP)

● Over-Current and Over-Temperature Protections

● Fast Load Transient Response

● Logic Level Enable Input for ON/OFF Control

● -40℃ to +125℃ Operating Temperature Range

● Available in Green SOT-23-5, SOT-23-6 and

UTDFN-1.2×1.2-6L Packages

The SGM2037 is available in Green SOT-23-5, SOT-23-6

and UTDFN-1.2×1.2-6L packages. It operates over an

ambient temperature range of -40℃ to +125℃.

APPLICATIONS

Portable Equipment

Smartphone

Industrial and Medical Equipment

TYPICAL APPLICATION

V_IN

V_OUT

IN

OUT

FB

ON

C_IN

1μF

C_IN

1μF

EN

R₁

R₂

SGM2037

SGM2037-ADJ

OFF

C_OUT

2.2μF

C_OUT

2.2μF

V_BIAS

BIAS

GND

C_BIAS

0.1μF

C_BIAS

0.1μF

Figure 1. Fixed Voltage Typical Application Circuit

Figure 2. Adjustable Voltage Typical Application Circuit

SG Micro Corp

SEPTEMBER 2018 – REV. A

www.sg-micro.com

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

PACKAGE/ORDERING INFORMATION

SPECIFIED

TEMPERATURE

RANGE

PACKAGE

ORDERING

NUMBER

PACKAGE

MARKING

PACKING

OPTION

MODEL

DESCRIPTION

SOT-23-5

SGM2037-0.8

SGM2037-0.9

SGM2037-1.0

SGM2037-1.05

SGM2037-1.1

SGM2037-1.15

SGM2037-1.2

SGM2037-1.25

SGM2037-1.3

SGM2037-1.5

SGM2037-1.8

SGM2037-2.5

SGM2037-2.8

SGM2037-3.0

SGM2037-3.3

SGM2037-3.6

SGM2037-ADJ

SGM2037-0.8

SGM2037-0.9

SGM2037-1.0

SGM2037-1.05

SGM2037-1.1

SGM2037-1.15

SGM2037-1.2

SGM2037-1.25

SGM2037-1.3

SGM2037-1.5

SGM2037-1.8

SGM2037-2.5

SGM2037-0.8XN5G/TR

SGM2037-0.9XN5G/TR

SGM2037-1.0XN5G/TR

SGM2037-1.05XN5G/TR

SGM2037-1.1XN5G/TR

SGM2037-1.15XN5G/TR

SGM2037-1.2XN5G/TR

SGM2037-1.25XN5G/TR

SGM2037-1.3XN5G/TR

SGM2037-1.5XN5G/TR

SGM2037-1.8XN5G/TR

SGM2037-2.5XN5G/TR

SGM2037-2.8XN5G/TR

SGM2037-3.0XN5G/TR

SGM2037-3.3XN5G/TR

SGM2037-3.6XN5G/TR

SGM2037-ADJXN6G/TR

SGM2037-0.8XUDX6G/TR

SGM2037-0.9XUDX6G/TR

SGM2037-1.0XUDX6G/TR

SGM2037-1.05XUDX6G/TR

SGM2037-1.1XUDX6G/TR

SGM2037-1.15XUDX6G/TR

SGM2037-1.2XUDX6G/TR

SGM2037-1.25XUDX6G/TR

SGM2037-1.3XUDX6G/TR

SGM2037-1.5XUDX6G/TR

SGM2037-1.8XUDX6G/TR

SGM2037-2.5XUDX6G/TR

GP6XX Tape and Reel, 3000

GV1XX Tape and Reel, 3000

GV2XX Tape and Reel, 3000

GV3XX Tape and Reel, 3000

GV4XX Tape and Reel, 3000

GV5XX Tape and Reel, 3000

GV6XX Tape and Reel, 3000

GV7XX Tape and Reel, 3000

GV8XX Tape and Reel, 3000

GV9XX Tape and Reel, 3000

GVAXX Tape and Reel, 3000

GVBXX Tape and Reel, 3000

GVCXX Tape and Reel, 3000

GVDXX Tape and Reel, 3000

GVEXX Tape and Reel, 3000

M35XX Tape and Reel, 3000

GVFXX Tape and Reel, 3000

-40℃ to +125℃

SOT-23-5

SOT-23-6

36

XX

UTDFN-1.2×1.2-6L

Tape and Reel, 5000

Z9

XX

Tape and Reel, 5000

ZA

XX

Tape and Reel, 5000

ZB

Tape and Reel, 5000

XX

ZC

Tape and Reel, 5000

XX

ZD

Tape and Reel, 5000

XX

ZE

Tape and Reel, 5000

XX

ZF

XX

Tape and Reel, 5000

00

XX

Tape and Reel, 5000

01

Tape and Reel, 5000

XX

02

XX

Tape and Reel, 5000

03

Tape and Reel, 5000

XX

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

2

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

PACKAGE/ORDERING INFORMATION (continued)

SPECIFIED

TEMPERATURE

RANGE

PACKAGE

DESCRIPTION

ORDERING

NUMBER

PACKAGE

MARKING

PACKING

OPTION

MODEL

04

XX

05

XX

06

XX

37

XX

07

XX

SGM2037-2.8

SGM2037-3.0

SGM2037-3.3

SGM2037-3.6

SGM2037-ADJ

UTDFN-1.2×1.2-6L

SGM2037-2.8XUDX6G/TR

SGM2037-3.0XUDX6G/TR

SGM2037-3.3XUDX6G/TR

SGM2037-3.6XUDX6G/TR

SGM2037-ADJXUDX6G/TR

Tape and Reel, 5000

-40℃ to +125℃

MARKING INFORMATION

NOTE: XX = Date Code.

SOT-23-6/SOT-23-5

UTDFN-1.2×1.2-6L

Serial Number

YY

X X

YYY X X

Date Code - Month

Date Code - Year

Serial Number

Date Code - Month

Date Code - Year

Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If

you have additional comments or questions, please contact your SGMICRO representative directly.

ABSOLUTE MAXIMUM RATINGS

OVERSTRESS CAUTION

IN, BIAS, EN to GND ........................................... -0.3V to 6V

OUT, FB to GND.................................... -0.3V to (V_IN+ 0.3V)

Power Dissipation, P_D@ T_A= +25℃

SOT-23-5 ...................................................................584mW

SOT-23-6 ...................................................................641mW

UTDFN-1.2×1.2-6L ....................................................612mW

Package Thermal Resistance

Stresses beyond those listed in Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to

absolute maximum rating conditions for extended periods

may affect reliability. Functional operation of the device at any

conditions beyond those indicated in the Recommended

Operating Conditions section is not implied.

SOT-23-5, θ_JA.......................................................... 214℃/W

SOT-23-6, θ_JA.......................................................... 195℃/W

UTDFN-1.2×1.2-6L, θ_JA........................................... 204℃/W

Junction Temperature .................................................+150℃

Storage Temperature Range........................-65℃ to +150℃

Lead Temperature (Soldering, 10s).............................+260℃

ESD Susceptibility

ESD SENSITIVITY CAUTION

This integrated circuit can be damaged if ESD protections are

not considered carefully. It recommends that all integrated

circuits be handled with appropriate precautions. Failure to

observe proper handling and installation procedures can

cause damage. ESD damage can range from subtle

performance degradation tocomplete device failure. Precision

integrated circuits may be more susceptible to damage

because even small parametric changes could cause the

device not to meet the published specifications.

HBM.............................................................................8000V

MM.................................................................................400V

CDM ............................................................................1000V

RECOMMENDED OPERATING CONDITIONS

Operating Input Voltage Range, V_IN....................0.8V to 5.5V

Operating Bias Voltage Range, V_BIAS..................2.5V to 5.5V

BIAS Effective Capacitance, C_BIAS...................... 0.1μF (MIN)

Input Effective Capacitance, C_IN......................... 0.5μF (MIN)

Output Effective Capacitance, C_OUT....................1μF to 10μF

Operating Temperature Range .....................-40℃ to +125℃

DISCLAIMER

We reserve the right to make any change in circuit design, or

specifications without prior notice.

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

3

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

PIN CONFIGURATIONS

SGM2037-Fixed Output

SGM2037-ADJ

1

2

3

5

4

1

2

3

6

5

4

IN

GND

BIAS

OUT

IN

GND

BIAS

OUT

FB

EN

SOT-23-5

SOT-23-6

SGM2037-Fixed Output

SGM2037-ADJ

1

2

3

6

5

4

1

2

3

6

5

4

OUT

NC

IN

OUT

FB

IN

GND

BIAS

GND

BIAS

EN

UTDFN-1.2×1.2-6L

PIN DESCRIPTION

NAME

FUNCTION

UTDFN-

SOT-23-5

SOT-23-6

1.2×1.2-6L

1

2

3

1

2

3

6

5

4

IN

Input Voltage Supply Pin.

Ground.

GND

BIAS

Bias Voltage Supply for Internal Control Circuits. This pin is

monitored by internal under-voltage lockout circuit.

Enable Pin. Drive EN high to turn on the regulator. Drive EN low to

turn off the regulator. The EN pin has an internal pull-down

resistance which ensures that the device is turned off when the

EN pin is floated.

Regulated Output Voltage Pin. It is recommended to use output

capacitor with effective capacitance in the range of 1μF to 10μF.

Feedback Pin (adjustable voltage version only). Connect this pin to

the midpoint of an external resistor divider to adjust the output

voltage.

4

5

4

3

1

EN

6

5

‒

OUT

FB

NC

‒

2

No Connection (fixed voltage version).

Exposed Pad. Exposed pad is internally connected to GND.

Connect it to a large ground plane to maximize thermal

performance; not intended as an electrical connection point.

Exposed

Pad

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

4

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

ELECTRICAL CHARACTERISTICS

(V_BIAS= 2.7V or (V_OUT(NOM)+ 1.6V), whichever is greater, V_EN= V_BIAS, V_IN= V_OUT(NOM)+ 0.3V, I_OUT= 1mA, C_IN= 1μF, C_BIAS= 0.1μF,

C_OUT= 2.2μF, Full = -40℃ to +125℃, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

TEMP

MIN

TYP MAX UNITS

V_OUT(NOM)

V_{DROP_IN}

(V_OUT(NOM)

+

Operating Input Voltage Range

V_IN

5.5

V

+25℃

+

Operating Bias Voltage Range

Under-Voltage Lockout Threshold

Feedback Voltage

V_BIAS

V_UVLO

V_FB

+25℃

1.4) ≥ 2.5

V_BIASrising

Hysteresis

1.6

0.2

+25℃

V

SGM2037-ADJ, V_OUT= V_FB

I_OUT= 1mA to 500mA

,

0.7936

0.8 0.8064

+25℃

V_IN= (V_OUT(NOM)+ 0.3V) to (V_OUT(NOM)+ 1.0V),

V_BIAS= 2.7V or (V_OUT(NOM)+ 1.6V) to 5.5V,

I_OUT= 1mA to 500mA

-0.8

-1.5

0.8

1.5

+25℃

Output Voltage Accuracy

V_OUT

%

Full

∆V_OUT

∆V_IN× V_OUT

V_INLine Regulation

V_BIASLine Regulation

V_IN= (V_OUT(NOM)+ 0.3V) to 5.5V

0.002 0.03

%/V

+25℃

V_BIAS= 2.7V or (V_OUT(NOM)+ 1.6V) to 5.5V,

0.8V ≤ V_OUT(NOM)≤ 1.8V

+25℃

∆V_OUT

∆V_BIAS× V_OUTV_BIAS= (V_OUT(NOM)+ 1.6V) to 5.5V,

1.8V < V_OUT(NOM)≤ 3.6V

0.005

0.1

I_OUT= 1mA to 500mA, 0.8V ≤ V_OUT(NOM)≤ 1.8V

0.5

1

2

5

+25℃

Full

Load Regulation

ΔV_OUT

mV

I_OUT= 1mA to 500mA, 1.8V < V_OUT(NOM)≤ 3.6V

I_OUT= 150mA

35

50

170

1.5

V_INDropout Voltage ⁽¹⁾

V_{DROP_IN}

I_OUT= 500mA

120

1.2

670

340

V_BIASDropout Voltage ^{(1) (2)}

Output Current Limit

Short Current Limit

V_{DROP_BIAS}I_OUT= 500mA

I_LIM

I_SHORT

V

505

mA

V_OUT= 0V

-20

-30

20

30

FB Pin Input Current

I_FB

nA

μA

37

0.1

53

+25℃

Full

BIAS Pin Operating Current

IN Pin Disable Current

BIAS Pin Disable Current

EN Pin Threshold Voltage

I_BIAS

V_BIAS= 5.5V

V_EN= 0V

55

0.5

1.6

0.5

2.5

+25℃

Full

I_{DIS_IN}

0.01

+25℃

Full

I_{DIS_BIAS}

V_EN= 0V

V_IH

V_IL

EN input voltage high

EN input voltage low

Full

1.2

V

Full

0.25

EN Pin Pull-Down Resistance

Turn-On Time

R_EN

580

100

kΩ

+25℃

From assertion of

t_ON

PSRR

e_n

μs

+25℃

V_ENto V_OUT= 90%V_OUT(NOM)

V_INto V_OUT, f = 1kHz, V_OUT(NOM)= 1.0V,

I_OUT= 150mA, V_IN≥ 1.5V

V_BIASto V_OUT, f = 1kHz, V_OUT(NOM)= 1.0V,

I_OUT= 150mA, V_IN≥ 1.5V

V_INPower Supply Rejection Ratio

V_BIASPower Supply Rejection Ratio

Output Voltage Noise

71

76

25

dB

V_IN= V_OUT(NOM)+ 0.5V,

V_OUT(NOM)= 1.0V, f = 10Hz to 100kHz

μV_RMS

+25℃

Output Discharge Resistance

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

R_DISCH

T_SHDN

V_EN= 0V, V_OUT= 0.5V

120

160

20

Ω

℃

ΔT_SHDN

NOTES:

1. Dropout voltage is characterized when V_OUTfalls 5% below V_OUT(NOM)

.

2. For output voltages below 1.5V, V_BIASdropout voltage does not apply due to a minimum bias operating voltage of 2.5V.

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

5

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

TYPICAL PERFORMANCE CHARACTERISTICS

T_A= +25℃, V_IN= 1.3V, V_EN= V_BIAS= 2.7V, V_OUT(NOM)= 1.0V, C_IN= 1μF, C_BIAS= 0.1μF, C_OUT= 2.2μF, unless otherwise noted.

Turn-On Speed with EN Pin

Turn-Off Speed with EN Pin

V_EN

V_OUT

I_OUT= 0mA

Time (50μs/div)

Time (200μs/div)

V_INLine Transient Response

V_BIASLine Transient Response

V_IN

V_BIAS

V_OUT

V_IN= 1.3V to 2.3V, I_OUT= 500mA

V_BIAS= 2.7V to 3.7V, I_OUT= 500mA

Time (10μs/div)

Time (20μs/div)

Load Transient Response

I_OUT

V_OUT

I_OUT= 10mA to 500mA

I_OUT= 1mA to 500mA

Time (50μs/div)

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

6

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

T_A= +25℃, V_IN= 1.3V, V_EN= V_BIAS= 2.7V, V_OUT(NOM)= 1.0V, C_IN= 1μF, C_BIAS= 0.1μF, C_OUT= 2.2μF, unless otherwise noted.

V_INPower-Up/Power-Down Output Waveform

V_INPower Ramp-Up/Ramp-Down Output Waveform

V_IN

V_OUT

I_OUT= 150mA

Time (200μs/div)

Time (500μs/div)

V_BIASPower-Up/Power-Down Output Waveform

V_BIASPower Ramp-Up/Ramp-Down Output Waveform

V_BIAS

V_OUT

I_OUT= 150mA

Time (1ms/div)

Time (500μs/div)

Output Noise Density vs. Frequency

V_IN= 1.5V, I_LOAD= 1mA

Output Noise Density vs. Frequency

V_IN= 1.5V, I_LOAD= 500mA

2

1.8

1.6

1.4

1.2

1

2

1.8

1.6

1.4

1.2

1

0.8

0.6

0.4

0.2

0

0.8

0.6

0.4

0.2

0

0.01

0.1

1

10

100

0.01

0.1

1

10

100

Frequency (kHz)

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

7

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

T_A= +25℃, V_IN= 1.3V, V_EN= V_BIAS= 2.7V, V_OUT(NOM)= 1.0V, C_IN= 1μF, C_BIAS= 0.1μF, C_OUT= 2.2μF, unless otherwise noted.

V_INPower Supply Rejection Ratio vs. Frequency

V_IN= 1.5V, I_OUT= 150mA

V_BIASPower Supply Rejection Ratio vs. Frequency

V_IN= 1.5V, I_OUT= 150mA

90

80

70

60

50

40

30

20

10

0

120

100

80

60

40

20

0

C_OUT= 10μF

C_OUT= 2.2μF

0.01

0.1

1

10

100

1000

0.01

0.1

1

10

100

1000

Frequency (kHz)

V_INDropout Voltage vs. Output Current

V_BIASDropout Voltage vs. Output Current

180

160

140

120

100

80

1400

1200

1000

800

600

400

200

0

+125℃

+85℃

+25℃

-40℃

60

40

20

0

100

200

300

400

500

0

100

200

300

400

500

Output Current (mA)

BIAS Pin Operating Current vs. Output Current

BIAS Pin Operating Current vs. BIAS Voltage

40

39

38

37

36

35

34

33

32

31

30

40

38

36

34

32

30

28

26

24

22

20

I_OUT= 500mA

0

100

200

300

400

500

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Output Current (mA)

BIAS Voltage (V)

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

8

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

TYPICAL PERFORMANCE CHARACTERISTICS (continued)

T_A= +25℃, V_IN= 1.3V, V_EN= V_BIAS= 2.7V, V_OUT(NOM)= 1.0V, C_IN= 1μF, C_BIAS= 0.1μF, C_OUT= 2.2μF, unless otherwise noted.

V_INDropout Voltage vs. (V_BIAS- V_OUT

)

V_INDropout Voltage vs. (V_BIAS- V_OUT)

400

350

300

250

200

150

100

50

400

350

300

250

200

150

100

50

I_OUT= 100mA

I_OUT= 300mA

-40℃

+25℃

+85℃

+125℃

-40℃ +25℃ +85℃ +125℃

0

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

V_BIAS- V_OUT(V)

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

V_BIAS- V_OUT(V)

V_INDropout Voltage vs. (V_BIAS- V_OUT

)

V_INDropout Voltage vs. Temperature

400

350

300

250

200

150

100

50

180

160

140

120

100

80

I_OUT= 500mA

-40℃ +25℃ +85℃ +125℃

I_OUT= 150mA

60

40

0

20

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

V_BIAS- V_OUT(V)

-40 -25 -10

5

20 35 50 65 80 95 110 125

Temperature (℃)

Output Voltage vs. Temperature

1.0015

1.0010

1.0005

1.0000

0.9995

0.9990

0.9985

0.9980

3.6060

3.6040

3.6020

3.6000

3.5980

3.5960

3.5940

3.5920

V_OUT(NOM)= 1.0V, V_IN= 1.3V,

_EN= V_BIAS= 2.7V, I_OUT= 1mA,

V_OUT(NOM)= 3.6V, V_IN= 3.9V,

_EN= V_BIAS= 5.2V, I_OUT= 1mA,

V

UTDFN-1.2×1.2-6L

-40 -25 -10

5

20 35 50 65 80 95 110 125

Temperature (℃)

-40 -25 -10

5

20 35 50 65 80 95 110 125

Temperature (℃)

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

9

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

FUNCTIONAL BLOCK DIAGRAM

Current

Limit

IN

OUT

BIAS

Voltage

Reference

+

120Ω

-

R₁

UVLO

Thermal

Shutdown

Control

Logic

R₂

EN

R_EN

GND

SGM2037

Figure 3. Fixed Version Block Diagram

Current

Limit

IN

OUT

BIAS

Voltage

Reference

0.8V

+

-

120Ω

UVLO

FB

Thermal

Shutdown

Control

Logic

EN

R_EN

GND

SGM2037-ADJ

Figure 4. Adjustable Version Block Diagram

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

10

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

APPLICATION INFORMATION

The SGM2037 is a low noise high performance LDO

with fast transient response. It consumes only 37μA

(TYP) quiescent current and provides 500mA output

current. The SGM2037 provides protection functions

for output overload, output short-circuit condition and

overheating.

When the EN pin voltage is higher than 1.2V, the device

is in active state. The input voltage is regulated to the

output voltage and the automatic discharge transistor is

turned off.

Adjustable Regulator

The output voltage of the SGM2037-ADJ can be

adjusted from 0.8V to 3.6V. The FB pin will be

connected to two external resistors as shown in Figure 5.

The output voltage is determined by the following

equation:

The SGM2037 is suitable for applications which need

noise sensitive circuit such as battery-powered

equipment and smartphones.

Input Capacitor Selection (C_IN)

The input decoupling capacitor is necessary to be

connected as close as possible to the IN pin for

ensuring the device stability. A 1μF or larger X7R or

X5R ceramic capacitor is selected to get good dynamic

performance.





R



¹

(1)

V_OUT= V × 1+

FB

R₂





where:

V_OUTis output voltage and V_FBis the internal voltage

reference, V_FB= 0.8V. Choose R₂= 40kΩ to maintain a

20μA minimum load.

When V_INis required to provide large current

instantaneously, a large effective input capacitor is

required. Multiple input capacitors can limit the input

tracking inductance. Adding more input capacitors is

available to restrict the ringing and to keep it below the

device absolute maximum ratings.

V_IN

V_OUT

IN

OUT

ON

C_IN

1μF

EN

R₁

R₂

SGM2037-ADJ

OFF

C_OUT

2.2μF

FB

V_BIAS

BIAS

GND

C_BIAS

0.1μF

Output Capacitor Selection (C_OUT

)

The output decoupling capacitor should be located as

close as possible to the OUT pin. A 1μF or larger X7R

or X5R ceramic capacitor is selected to get good

dynamic performance. The minimum effective

capacitance of C_OUTthat SGM2037 can remain stable

is 1μF. For ceramic capacitor, temperature, DC bias

and package size will change the effective capacitance,

so enough margin of C_OUTmust be considered in

design. Larger capacitance and lower ESR C_OUTwill

help improve the load transient response and increase

the high frequency PSRR.

Figure 5. Adjustable Output Voltage Application

Dropout Voltage

The SGM2037 specifies two dropout voltages because

there are two power supplies V_INand V_BIASand one

V_OUTregulator output. V_INdropout voltage is defined as

the difference between V_INand V_OUTwhen V_OUTfalls 5%

below V_OUT(NOM). When the output voltage is lower than

1.5V, V_BIASdropout voltage is not applicable because

the minimum bias operating voltage is 2.5V.

When V_OUTbegins to decrease and V_BIASis high

Enable Operation

enough, the V_INdropout voltage equals to V_IN- V_OUT

.

The SGM2037 uses the EN pin to enable/disable the

device and to deactivate/activate the output automatic

discharge function.

V_BIASdropout voltage refers to V_BIAS- V_OUTwhen the IN

and BIAS pins are connected together and V_OUTbegins

to decrease.

When the EN pin voltage is lower than 0.25V, the

device is in shutdown state. There is no current flowing

from IN pin to OUT pin. In this state, the automatic

discharge transistor is active to discharge the output

voltage through a 120Ω (TYP) resistor.

Output Current Limit and Short-Circuit

Protection

When an overload event happens, the output current is

internally limited to 670mA (TYP). When the OUT pin is

shorted to ground, the short-circuit protection will limit

the output current to 340mA (TYP).

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

11

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

APPLICATION INFORMATION (continued)

P_D(MAX)= (T_J(MAX)- T_A) / θ_JA

(2)

Thermal Shutdown

The SGM2037 can detect the temperature of die. When

where T_J(MAX)is the maximum junction temperature, T_A

is the ambient temperature, and θ_JAis the junction

-to-ambient thermal resistance.

the die temperature exceeds the threshold value of

thermal shutdown, the SGM2037 will be in shutdown

state and it will remain in this state until the die

temperature decreases to +140℃.

Negatively Biased Output

When the output voltage is negative, the chip may not

start up due to parasitic effects. Ensure that the output

is greater than -0.3V under all conditions. If negatively

biased output is excessive and expected in the

application, a Schottky diode can be added between

the OUT pin and GND pin.

Power Dissipation (P_D)

Thermal protection limits power dissipation in the

SGM2037. When power dissipation on pass element

(P_D= (V_IN- V_OUT) × I_OUT) is too much and the operating

junction temperature exceeds +160℃, the OTP circuit

starts the thermal shutdown function and turns the pass

element off.

Reverse Current Protection

Therefore, thermal analysis for the chosen application

is important to guarantee reliable performance over all

conditions. To guarantee reliable operation, the junction

temperature of the SGM2037 must not exceed 125℃.

The NMOS power transistor has an inherent body

diode, this body diode will be forward biased when

V_OUT> V_IN. When V_OUT> V_IN, the reverse current

flowing from the OUT pin to the IN pin will damage the

SGM2037. If V_OUT> (V_IN+ 0.3V) is expected in the

application, one external Schottky diode will be added

between the OUT pin and IN pin to protect the

SGM2037.

The maximum allowable power dissipation depends on

the thermal resistance of the IC package, the PCB

layout, the rate of surrounding airflow, and the difference

between the junction temperature and ambient

temperature. The maximum power dissipation can be

approximated using the following equation:

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

12

500mA, Low Noise, Very Low Dropout

Bias Rail CMOS Voltage Regulator

SGM2037

TYPICAL APPLICATION CIRCUIT

V_BAT

+

BIAS

IN

SW

IN

OUT

Switch-Mode

SGM2037

DC/DC

To Other

Circuits

I/O

EN

FB

Processor

Load

IC

EN

GND

I/O

GND

Figure 6. Used as DC/DC Post Regulator

REVISION HISTORY

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Original (SEPTEMBER 2018) to REV.A

Page

Changed from product preview to production data .................................................................................................................................................All

SG Micro Corp

www.sg-micro.com

SEPTEMBER 2018

13

PACKAGE INFORMATION

PACKAGE OUTLINE DIMENSIONS

SOT-23-5

1.90

D

e1

2.59

E1

E

0.99

b

e

0.95

0.69

RECOMMENDED LAND PATTERN (Unit: mm)

L

A

A1

c

θ

0.2

A2

Dimensions

In Millimeters

Dimensions

In Inches

Symbol

MIN

MAX

1.250

0.100

1.150

0.500

0.200

3.020

1.700

2.950

MIN

MAX

0.049

0.004

0.045

0.020

0.008

0.119

0.067

0.116

A

A1

A2

b

1.050

0.000

1.050

0.300

0.100

2.820

1.500

2.650

0.041

0.000

0.041

0.012

0.004

0.111

0.059

0.104

c

D

E

E1

e

0.950 BSC

1.900 BSC

0.037 BSC

0.075 BSC

e1

L

0.300

0°

0.600

8°

0.012

0°

0.024

8°

θ

SG Micro Corp

www.sg-micro.com

TX00033.000

PACKAGE INFORMATION

PACKAGE OUTLINE DIMENSIONS

SOT-23-6

D

e1

e

E1

E

2.59

0.99

b

0.95

0.69

RECOMMENDED LAND PATTERN (Unit: mm)

L

A

A1

c

θ

A2

0.2

Dimensions

In Millimeters

Dimensions

In Inches

Symbol

MIN

MAX

MIN

MAX

0.049

0.004

0.045

0.020

0.008

0.119

0.067

0.116

A

A1

A2

b

1.050

0.000

1.050

0.300

0.100

2.820

1.500

2.650

1.250

0.100

1.150

0.500

0.200

3.020

1.700

2.950

0.041

0.000

0.041

0.012

0.004

0.111

0.059

0.104

c

D

E

E1

e

0.950 BSC

1.900 BSC

0.037 BSC

0.075 BSC

e1

L

0.300

0°

0.600

8°

0.012

0°

0.024

8°

θ

SG Micro Corp

www.sg-micro.com

TX00034.000

PACKAGE INFORMATION

PACKAGE OUTLINE DIMENSIONS

UTDFN-1.2×1.2-6L

D

e

N4

N6

E1

E

D1

N1

N3

L

b

TOP VIEW

BOTTOM VIEW

0.89

0.30 1.80

A

A1

A2

0.55

0.18

SIDE VIEW

0.40

RECOMMENDED LAND PATTERN (Unit: mm)

Dimensions In Millimeters

Symbol

MIN

MOD

MAX

0.600

0.050

A

A1

A2

e

0.500

0.550

0.152 REF

0.400 BSC

1.200

D

1.150

0.840

0.250

0.130

0.200

1.250

0.940

0.350

0.230

0.300

E

1.200

D1

E1

b

0.890

0.300

0.180

L

0.250

SG Micro Corp

TX00143.000

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PACKAGE INFORMATION

TAPE AND REEL INFORMATION

REEL DIMENSIONS

TAPE DIMENSIONS

P2

P0

W

Q2

Q4

Q2

Q4

Q2

Q4

Q1

Q3

Q1

Q3

Q1

Q3

B0

Reel Diameter

P1

A0

K0

Reel Width (W1)

DIRECTION OF FEED

NOTE: The picture is only for reference. Please make the object as the standard.

KEY PARAMETER LIST OF TAPE AND REEL

Reel Width

Reel

Diameter

A0

B0

K0

P0

P1

P2

W

Pin1

Package Type

W1

(mm)

(mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant

SOT-23-5

SOT-23-6

7″

9.5

9.0

3.20

3.17

1.35

3.20

3.23

1.35

1.40

1.37

0.73

4.0

2.0

8.0

Q3

Q1

UTDFN-1.2×1.2-6L

SG Micro Corp

TX10000.000

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PACKAGE INFORMATION

CARTON BOX DIMENSIONS

NOTE: The picture is only for reference. Please make the object as the standard.

KEY PARAMETER LIST OF CARTON BOX

Length

(mm)

Width

(mm)

Height

(mm)

Reel Type

Pizza/Carton

7″ (Option)

7″

368

442

227

410

224

8

18

SG Micro Corp

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TX20000.000


型号：	SGM2037
厂家：	Shengbang Microelectronics Co, Ltd
描述：	500mA, Low Noise, Very Low Dropout Bias Rail CMOS Voltage Regulator
文件：	总18页 (文件大小：901K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SGM2037 [SGMICRO]

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