Datasheet MAS9122ASM4-T, MAS9122ASM3-T, MAS9122ASM2-T Datasheet (MAS-OY)

DA9122.002

7 September, 2001

MAS9122

3 Outputs LDO Voltage Regulator IC

• Three Low Dropout Vol t age

Regulators

• Very Low Noise: 25 µVrms

• High Ripple Rejection: 63 dB

• Very Low Crosstalk

• Low Ground Pin Cur rent

• Regulator Enable/Disable

Control

DESCRIPTION
MAS9122 is a three output voltage regulator. It is

designed for three different output voltages, which
can be modified through a m ask option. Regulator s
operating mode is controlled by two enable/disable
pins. The circuit consists of a bandgap voltage
reference, an error amplifier, a current limit circuit
and a thermal protection circuit.

FEATURES APPLICATION

• Three Regulators at 135 mA, 70 mA and 50 mA

• Output Options 2.70, 2.85 and 3.00 V, see

Ordering Information p. 12

• Low Noise: 20 µVrms Typical and
30 µVrms Maximum for All Regulators over
Frequency Range 100 Hz…100 kHz

• Fast Dynamic Response

• Output Voltage Accuracy < ±2.0 %

• MSOP-8 Package

MAS9122 features very low ground pin current:
typically less than 1.5 µA sleep mode current and
typical 125 µA for one regulator in active mode.
Excellent noise and PSRR performance enables the
use of MAS9122 in high precision portable devices.
Low crosstalk between regulators provides an area
efficient solution compared to single regulators.

• Systems Requiring Stabilized Power in
Separate Blocks

• Cordless Phones

• Mobile Phones

• Portable Systems

• Battery Powered Systems

BLOCK DIAGRAM

ENA

ENBC

OR­gate

VIN

Temperature
Protection

&

GND

LDO_A

&

135 mA

LDO_B

&

70 mA

LDO_C

&

50 mA

Bandgap
Reference

OUT A

OUT B

OUT C

VREF

1 (12)

PIN CONFIGURATION

DA9122.002

7 September, 2001

Top View

PIN DESCRIPTION

Pin Name Pin Type Function

OUTA 1 O 135 mA Regulator Output
OUTC 2 O 50 mA Regulator Output
ENBC 3 I Enable for Regulators B and C

ENA 4 I Enable for Regulator A

VREF 5 O Reference Voltage: Pin for Bypass Capacitor

GND 6 P Ground

VIN 7 P Positive Supply Voltage

OUTB 8 O 70 mA Regulator Output

OUTA 1

OUTC 2

ENBC 3

ENA 4

Top Marking Information:

AX = voltage version, see p.12 Ordering information

A
X

9

W

1

2

W

2

WW = week

8 OUTB

7 VIN

6 GND

5 VRF

G = Ground, I = Input, O = Output, P = Power

2 (12)

DA9122.002

7 September, 2001

ABSOLUTE MAXIMUM RATINGS

All Voltages with Respect to Ground

Parameter Symbol Conditions Min Max Unit

Supply Voltage V
Voltage Range for All Pins

IN

−0.3

−0.3

6V

V

+ 0.3 V

IN

ESD Rating HBM 2 kV
Junction Temperature T

Storage Temperature T

Stresses beyond those li sted may cause permanent damage to the device. The device may not operate under these conditions, but will not
be destroyed.

Jmax

S

−55

175

(limited)

+150

o

C

o

C

Parameter Symbol Conditions Min Max Unit

Supply Voltage V
Operating Junction

IN

T

J

V

OUT(NOM)

+ 0.25 5.3 V

−40

+125 °C

Temperature

Operating Ambient

T

A

−40

+85 °C

Temperature

ELECTRICAL CHARACTERISTICS

TA = -40°C to +85°C, typical values at TA = +27°C, VIN = 4.5 V, I

◆ Thermal Protection

Parameter Symbol Conditions Min Typ Max Unit

Threshold High T
Threshold Low T

The hysteresis of 10 oC prevents the device from turning on too soon after thermal shut-down.

H

L

= 1.0 mA, C

OUT

= 1.0 µF, CL = 1.0 µF, C

IN

= 2.0 V, unless otherwise spec i fied.

V

CTRL

BYPASS

130 150 170
120 140 160

= 10 nF,

o

C

o

C

◆ Control Pin Parameters

Parameter Symbol Conditions Min Typ Max Unit

Input Voltage

ENA,

−0.3

+ 0.3

V

IN

V

ENBC
ON-state
OFF-state

If CTRL-pin is not connected, the particular regulator(s) is/are in OFF state (900 kΩ pull-down resis tor to ground).

2.0

0.3

3 (12)

DA9122.002

ENA,ENBC

7 September, 2001

◆ Current Parameters

Parameter Symbol Conditions Min Typ Max Unit

LDO_A Continuous Output Current I
LDO_B Continuous Output Current I

LDO_C Continuous Output Current I
Short Circuit Current for LDO_A I
Short Circuit Current for LDO_B I
Short Circuit Current for LDO_C I
Ground Pin Current I

Ground Pin Current I
Ground Pin Current I
Ground Pin Current I

GND(ONBC)

GND(ONABC)IOUT

OUTA

OUTB

OUTC

SHORTA

SHORTB

SHORTC

GND(OFF)IOUT

GND(ONA)

= 0 A, V

I

OUT

V

ENBC

I

= 0 A, V

OUT

V

ENBC

= 0 A, V

= 3.6

V

IN

= 0 A, V

ENA

< 0.3 V, V

ENA

> 2 V, V

ENA, ENBC

= 3.6

V

IN

< 0.3 V,

> 2 V,

= 3.6

IN

< 0.3 V,

= 3.6

IN

> 2 V

0 135 mA
070mA

050mA

350 mA
265 mA
230 mA

24
125
170
245

µA
µA
µA
µA

◆ Voltage Parameters

Parameter Symbol Conditions Min Typ M ax Unit

Output Voltage:

V

OUTA

Max I

= 135 mA

OUT

2.85 – 3%

2.85

2.85 + 2%

V

Mask option for 2.85 V

LDO_A Dropout
Voltage
LDO_B Dropout

V

OUTA,B,C

V

DROPA

V

DROPB

Max I

70 mA, Max I

= 100 mA, Max I

OUTA

I

= 135 mA

OUTA

= 100 mA

I

OUTA

I

= 70 mA 165 mV

OUTB

OUTC

OUTB

= 50 mA

=

2.85 – 2%

2.85
220

180

2.85 + 2%

V

mV

Voltage
LDO_C Dropout

V

DROPC

I

= 50 mA 150 mV

OUTC

Voltage

◆ External Capacitors

Parameter Symbol Conditions Min Typ Max Unit

Output Capacitors for

all Regulators C

OUTA,B,C

0.8 1
Effective Series Resistance ESR 0.01 0.1 2
Bypass Capacitor C

BYPASS

10 nF

µF

Ω

◆ Power Dissipation

Parameter Symbol Conditions Min Typ Max Unit

Junction to Case Thermal

R

JC

39 °C/W
Resistance
Junction to Ambient Thermal
Resistance

Maximum Power Dissipation P

Note 1: T
resistance (+206°C/W).

denotes maximum operati ng j unction temperature (+125°C), TA ambient temperature, and RJA junction-to-ambient thermal

J(MAX)

R

JA

typical PC board mounting,

206 °C/W

still air

TT

−

J

d

any ambient temperature

P

d

MAX

Note 1

(MAX)

=

A

R

JA

mW

4 (12)

DA9122.002

7 September, 2001

◆ Load Regulation

Parameter Symbol Conditions Min Typ Max Unit

Load Regulation LDO_A 0 mA < I

0 mA < I
Load Regulation LDO_B 0 mA < I
Load Regulation LDO_C 0 mA < I

< 135 mA

OUT

< 100 mA

OUT

< 70 mA 21 25 mV

OUT

< 50 mA 13 22 mV

OUT

22
22

50
30

mV

◆ Line Regulation

Parameter Symbol Conditions Min Typ Max Unit

Line Regulation for all LDOs I

OUT

= I

MAX

,V

from 5.3 V to 3.1 V 0.40 1.2 mV

IN

◆ PSRR

Parameter Symbol Conditions Min Typ Max Unit

PSRR for all LDOs I

= Max I

OUT

V

IN

OUT

= 3.6 V

f = 1 kHz

f = 10 kHz 47

dB

75
63

◆ Noise and Crosstalk

Parameter Symbol Conditions Min Typ Max Unit

Noise Voltage for all LDOs V

NO

100 Hz < f < 100 kHz 25 30

µVrms

◆ Dynamic Parameters

Parameter Symbol Conditions Min Typ Max Unit

Start-up Delay (from enabling
LDO_A to 90% * V

OUT(NOM)

,

other LDOs at ON state)

from < 0.3 V to > 2.0 V,

V

ENA

V

ENBC >

2.0 V, I
C

OUTA

= Max I

OUT

= 1 µF

OUT

25

µs

,

(Note 2)
Overshoot V

Settling Time
(from 90% * V

OUT(NOM)A

to max

±0.1% fluctuation)

Note 2: When all regulators are disabled the start-up delay is a function of a bypass capac i tor. Typically 0.5 ms for 10 nF capacitor.

from < 0.3 V to > 2.0 V,

ENA

V

V

V

2.0 V, I

ENBC >

C

OUTA

from < 0.3 V to > 2.0 V,

ENA

2.0 V, I

ENBC >

= 1 µF, w/o C

C

OUTA

= Max I

OUT

= 1 µF

= Max I

OUT

BYPASS

OUT

OUT

1%

,

200

µs

,

TRL

VOUT

overshoot

start-up delay

50%

90%

settling time

Figure 1. Definitions of
start-up delay, overshoot
and settling time.

5 (12)

APPLICATION INFORMATION

VIN 3.1 V ... 5.3 V

1 uF

OUTA

DA9122.002

7 September, 2001

VIN

OUTB

1 uF

ENA

ENBC

See also table External Capacitors on p. 4.

FUNCTIONS

◆ Reference voltage

The device is supplied with 3.1 V to 5.3 V battery
under normal conditions. An internal bandgap
voltage reference is routed via 20 kOhm resistor to
an external pin, where a filter capacitor can be
connected in order to reduce noise level of all
regulators. The startup time of the reference
voltage is then determined by the value of the
bypass capacitor at pin VREF.

◆ Enable pins

Each regulator can be enabled/disabled by two
enable pins ENA and ENBC. Pin ENA controls
regulator LDO_A and pin ENBC controls both

MAS9122

GND

regulator LDO_B and LDO_C. If both enable pins
are forced low, the whole circuit goes into power
saving sleep-mode. In the table below all f unctional
modes are presented.

◆ Regulators

The device contains three low dropout CMOS
regulators, with maximum output currents of 135
mA, 70 mA and 50 mA. Three different output
voltage options are available by mask option:

2.70 V, 2.85 V and 3.00 V.

OUTC

VREF

1 uF

1 uF

10 nF

◆ Logic Table for Enable Inputs

ENA ENBC LDO_A LDO_B LDO_C VREF

1 1 ON ON ON ON
1 0 ON OFF OFF ON
0 1 OFFONONON

0 0 OFF OFF OFF OFF

6 (12)

TYPICAL PERFORMANCE

DA9122.002

7 September, 2001

Vout (V)

2.8535

2.853

2.8525

2.852

2.8515

2.851

2.8505

2.85

2.8495

2.849

2.8485
0102030

Tim e (us)

4.5

4

3.5

3

2.5

2

Vin (V)

0 50 100 150 200 250 300 350

Time (us)

15
10
5
0

-5

-10

Delta Vout (mV)

-15

-20

-25

Figure 2. LDO_C line transient for 1 V change at supply voltage. Figure 5. LDO_A load transient respons e t o maximum output

current with 10 µs st eps (I

max 100 mA).

OUT

NOTE: With 135 mA current the overshoot values and l engt hs

15
10
5
0

-5

-10

Delta Vout (mV)

-15

-20

-25

450
400

350

300
250

200

150

Noise voltage (nV/sqrt(Hz))

100

50

0

100 1000 10000 100000

Frequency (Hz)

will grow by 30% compared to 100 mA current.

0 50 100 150 200 250 300 350

Time (us)

Figure 3. Regulator output noise densi t y. Figure 6. LDO_B load transient response to maximum output

current with 10 µs steps.

2.86

2.855

2.85

2.845

2.84

-40-200 20406080

Tem perature

Output voltage (V)

0 50 100 150 200 250 300 350

Time (us)

15
10
5
0

-5

-10

Delta Vout (mV)

-15

-20

-25

Figure 4. Regulator output voltage temperature dependency. Figure 7. LDO_C load transient response t o maximum output

current with 10 µs steps.

7 (12)

TYPICAL PERFORMANCE

DA9122.002

7 September, 2001

2.88

2.86

2.84

2.82

2.80

2.78

2.76

2.74

ldo_a and ldo_b outputs (V)

2.72

2.70
0 500 1000 1500

Time (100 us/Div)

Figure 8. LDO_A start-up, overshoot and cross-coupling Figure 11. Load regulation vs. tem perature.

to LDO_B.

250

200

150

100

50

Dropout voltage (mV)

0

-40-200 20406080

Tem perature

LDO_A
LDO_B
LDO_C

25

20

15

10

5

Load regulation (mV)

0

-40-200 20406080

Temp era ture

360
340
320
300
280
260
240
220

Short circuit current (mA)

200

33.544.555.56

Supply voltage (V)

LDO_A
LDO_B
LDO_C

LDO_A

LDO _B

LDO _C

Figure 9. Dropout voltage temperature Figure 12. Short circuit current variation vs. supply

dependency with maximum output current. voltage.

450

400

350

max. load

120
110
100

90
80

300

70
60

250

Ground Pin Current (uA)

200

-40-200 20406080

Temp era ture

Figure 10. Total ground pin current vs. t emperature. Figure 13. LDO_A ground pin current vs. output current.

min l oad

50

Ground Pin Current (uA)

40

020406080100

Output current (m A)

8 (12)

PACKAGE (MSOP-8) OUTLINE

DA9122.002

7 September, 2001

D

A1

b

Symbol Min Nom Max Unit

A1.10mm
A1 0 0.15 mm
A2 0.75 0.85 0.95 mm

b 0.22 0.38 mm
b1 0.22 0.30 0.33 mm

c 0.08 0.23 mm

c1 0.08 0.18 mm

D 3.00 BSC mm

E 4.90 BSC mm
E1 3.00 BSC mm

e 0.65 BSC mm

F4.8mm

G0.65mm

L

(Terminal length for

soldering)

M0.41mm
N1.02mm

P0° 8°

Q 0.25 BSC mm
R0.07 mm

R1 0.07 mm

E1

Gage plane

Land

E

F

Pattern

Recommendation

Q

P

L

R1

R

A

A

N

e

G

M

c

c1

b1

A2

A

(b)

Section A - A

0.40 0.60 0.80 mm

Dimensions do not include mold or interlead flash, protrusions or gate burrs.

All measurement according to JEDEC standard MO-187.

9 (12)

SOLDERING INFORMATION

DA9122.002

7 September, 2001

Resistance to Soldering Heat
Maximum Reflow Temperature

According to RSH test IEC 68-2-58/20 2*220°C

235°C
Maximum Number of Reflow Cycles 2
Seating Plane Co-planarity max 0.08 mm
Lead Finish

Solder plate 7.62 - 25.4 µm, material Sn 85% Pb 15%

EMBOSSED TAPE SPECIFICATIONS

P1

DO

1

D

W

O

P2

P

E

F

A

A

O

User Direction of Feed

O

B

Section A-A

T

O

K

Pin 1 Designator

Dimension Min/Max Unit

Ao
Bo

5.00 ±0.10

3.20 ±0.10

mm

mm
Do 1.50 +0.1/-0.0 mm
D1 1.50 min mm

E1.75mm
F

Ko

5.50 ±0.05

1.45 ±0.10

mm

mm
Po 4.0 mm
P1
P2

T

8.0 ±0.10

2.0 ±0.05

0.3 ±0.05

mm

mm

mm

W 12.00 +0.30/-0.10 mm

10 (12)

REEL SPECIFICATIONS

DA

DA9122.002

7 September, 2001

W

2

C

Tape Slot for Tape Start

N

B

W

1

5000 Components on Each Reel

Reel Material: Conductive, Plastic Antistatic or Static Dissipative

Carrier Tape Material: Conductive

Cover Tape Material: Static Dissipative

Carrier Tape

End

Trailer

Components

Leader

Dimension Min Max Unit

A 330 mm
B1.5 mm
C 12.80 13.50 mm
D 20.2 mm
N50 mm

W

(measured at hub) 12.4 14.4 mm

1

W

(measured at hub) 18.4 mm

2

Trailer 160 mm

Leader 390,

of which minimum 160

mm of empty carrier tape

sealed with cover tape

Weight 1500 g

Cover Tape

Start

mm

11 (12)

DA9122.002

7 September, 2001

ORDERING INFORMATION

Product Code Product Top Marking (ax) Package Comments

MAS9122ASM2-T 3 x 2.70 V LDO Voltage Regulator IC A2 MSOP-8 Tape & Reel
MAS9122ASM3-T 3 x 2.85 V LDO Voltage Regulator IC A3 MSOP-8 Tape & Reel
MAS9122ASM4-T 3 x 3.00 V LDO Voltage Regulator IC A4 MSOP-8 Tape & Reel

For more voltage options contact Micro Analog Systems Oy.

LOCAL DISTRIBUTOR

MICRO ANALOG SYSTEMS OY CONTACTS

Micro Analog Systems Oy
Kamreerintie 2, P.O.Box 51
FIN-02771 Espoo, FINLAND
http://www.mas-oy.com

NOTICE

Micro Analog Systems Oy reserves the right to make changes to the product s c ontai ned in thi s dat a sheet in order t o im prove the des ign or
performance and to supply the best poss ible products. Micro Analog Systems Oy assum es no responsibility for the use of any circuits
shown in this data sheet, conveys no license under any pat ent or other rights unl ess otherwise spec ified in thi s data sheet, and makes no
claim that the circ uits are free from patent infringement. Applic ations for any devices s hown in this data sheet are for illustration only and
Micro Analog Systems Oy mak es no claim or warranty that such applic ations will be suitable for t he use spec ified without further t esting or
modification.

Tel. [phone]
Tel. Int. [phone]
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E-mail: [e-mail]

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