NJM2828

- 1 - Ver.2016-05-10

Negative Output Low Drop Out voltage regulator GENERAL DESCRIPTION PACKAGE OUTLINE The NJM2828 is a negative output low dropout regulator. Advanced bipolar technology achieves low noise, high precision voltage and high ripple rejection. Adjustable soft-start function is useful for reducing inrush current and controlling power-on sequence. Moreover the discharge function, the shunt SW, makes effective sequence control with the soft-start function. 1.0 F Output capacitor and small package can make NJM2828 suitable for portable items.

FEATURES

Low Current Consumption 0.13V (typ.) @Io=60mA High Precision Output ±1.5% High Ripple Rejection 65dB(typ.) @f=1kHz, Vo=-7V Version Correspond to Low ESR capacitor with 1.0F ceramic capacitor. Output Current Io(max.)=100mA ON/OFF Control(Positive voltage control from 0 to +5V) Soft-start Function Shunt SW Function Thermal Shutdown Circuit Over Current Protection Bipolar Technology Package Outline SC88A

PIN CONFIGURATION

BLOCK DIAGRAM

NJM2828F3-XX

NJM2828F3

CurrentLimit

BandgapReference

OutputControl

ThermalProtection

GND

CS

CONTROL

VIN VOUT

GND 1 5 CS

4 CONTROL VIN 2

VOUT 3

NJM2828

- 2 - Ver.2016-05-10

OUTPUT VOLTAGE RANK LIST Device Name VOUT Device Name VOUT

NJM2828F3-14 -1.4V NJM2828F3-06 -6.0V NJM2828F3-15 -1.5V NJM2828F3-63 -6.3V NJM2828F3-02 -2.0V NJM2828F3-65 -6.5V NJM2828F3-22 -2.2V NJM2828F3-07 -7.0V NJM2828F3-03 -3.0V NJM2828F3-75 -7.5V NJM2828F3-04 -4.0V NJM2828F3-08 -8.0V NJM2828F3-05 -5.0V NJM2828F3-85 -8.5V NJM2828F3-51 -5.1V NJM2828F3-09 -9.0V NJM2828F3-55 -5.5V NJM2828F3-10 -10.0V

Output voltage options available : -1.5 ~ -10.0V (0.1V step)

ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL RATINGS UNIT

Input Voltage VIN -14 V Control Voltage VCONT +5 V Power Dissipation PD 250(*1) mW Operating Temperature Topr 40 +85 °C

Storage Temperature Tstg 40 +125 °C Output Sink Current at OFF-state ISINK(OFF) 10 mA

(*1): Mounted on glass epoxy board. (76.2×114.3×1.6mm: based on EIA/JEDEC standard, 2Layers)

Operating voltage VIN=-3.2 -12V (In case of Vo>-3.0V version)

NJM2828

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ELECTRICAL CHARACTERISTICS

(Vo<-2.2V Version: VIN=Vo-1V, VCONT=3V, CIN=0.1 F, Co=1.0 F, Ta=25 C) (Vo≥-2.2V Version: VIN=-3.2V, VCONT=3V, CIN=0.1 F, Co=2.2 F(Vo>-2.0V: Co=4.7 F), Ta=25 C)

PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Output Voltage Vo Io=30mA +1.5% - -1.5% V Quiescent Current IQ Io=0mA, except Icont - 130 200 µA Quiescent Current at OFF-state IQ(OFF) VCONT=0V - - 100 nA

Output Current Io VO+0.3V 100 130 - mA Line Regulation Vo/ VIN VIN=Vo-1V -12V, Io=30mA - - 0.10 %/V Load Regulation Vo/ Io Io=0 60mA - - 0.03 %/mA Dropout Voltage(*2) VI_O Io=60mA - 0.13 0.23 V

Ripple Rejection RR ein=200mVrms, f=1kHz, Io=10mA Vo=-7V Version - 65 - dB

Average Temperature Coefficient of Output Voltage

Vo/ Ta Ta=0 85°C, Io=10mA - ±50 - ppm/°C

Output Noise Voltage1 VNO f=10Hz 80kHz, Io=10mA, Vo=-7V Version - 100 - µVrms

CS Terminal Charge Current Ics VCS=0V 4 5 6 µA Output Resistance at OFF-state RO(OFF) VCONT=0V, Vo=-7V Version - 360 - Ω

Control Current ICONT VCONT=1.6V - 2 4 µA Control Voltage for ON-state VCONT(ON) 1.6 - - V

Control Voltage for OFF-state VCONT(OFF) - - 0.6 V

Input Voltage VIN -12 - - V (*2):Excludes Vo>-3.0V version. The above specification is a common specification for all output voltages. Therefore, it may be different from the individual specification for a specific output voltage.

TEST CIRCUIT

NJM2828

VIN

VIN VOUT

CONTROL

GND

0.1µF IQ

ICONT

VCONT

1.0µF*3

IOUT VOUT

V

V

A

0.047µF

CS

A

*3 -2.2V Vo< -2.0V version : Co=2.2 F(Ceramic) Vo -2.0V version : Co=4.7 F(Ceramic)

(Ceramic)

NJM2828

- 4 - Ver.2016-05-10

TYPICAL APPLICATIONS

ON/OFF control ON/OFF control can be controlled by positive logic voltage. When VCONT is “H”, the output becomes ON state, If VCONT is "L" or open (High Z), the output becomes OFF state. The relations between VCONT and the state is as follows:

VCONT +1.6V VCONT +5V ("H" level): ON state VCONT 0V VCONT +0.6V ("L" level): OFF state

VCONT +0.6V < VCONT < +1.6V ("L" level): Undefined If ON/OFF control is not used, keep applying positive VCONT to CONTROL pin to make the output constantly ON. Negative voltage should not use for VCONT .

NJM2828

VIN VOUT

CONTROL

GND

0.1µF

VOUT VIN

R CS

CONTROL CS

Cs=0.047µF

*4 -2.2V Vo< -2.0V version : Co=2.2 F Vo -2.0V version : Co=4.7 F

1.0µF*4

*In the case of using a resistor "R" to control line. If need to reduce the control current when the control voltage, insert a resistor to control pin. When insert the resistor “R”, should consider voltage drop by the resistor. Therefore the control voltage should set in

order to satisfy minimum VCONT(ON) with considering voltage drop. The VCONT(ON) and ICONT have temperature dependence as shown in "Control Current vs. Temperature" and " Control

Voltage vs. Temperature" characteristics. Therefore, the resistance "R" should be selected to consider the temperature characteristics.

NJM2828

- 5 - Ver.2016-05-10

*Input Capacitor CIN

The input capacitor CIN is required in order to prevent oscillation and reduce power supply ripple of applications when high power supply impedance or a long power supply line. Therefore, the recommended capacitance (refer to conditions of ELECTRIC CHARACTERISTIC) or larger input

capacitor, connected between VIN and GND as short path as possible, is recommended in order to avoid the problem. *Output Capacitor CO

The output capacitor CO is required for a phase compensation of the internal error amplifier, and the capacitance and the equivalent series resistance (ESR) influence stable operation of the regulator. If use a smaller output capacitor than the recommended capacitance (refer to conditions of ELECTRIC

CHARACTERISTIC), it may cause excess output noise or oscillation of the regulator due to lack of the phase compensation. Therefore, the recommended capacitance or larger output capacitor, connected between VOUT and GND as short path as possible, is recommended for stable operation. The recommended capacitance may be different by output voltage, therefore confirm the recommended capacitance of the required output voltage. Furthermore, a larger output capacitor reduces output noise and ripple output, and also improves Output

Transient Response when a load changes rapidly. Selecting the output capacitor, should consider varied characteristics of a capacitor: frequency characteristics,

temperature characteristics, DC bias characteristics and so on. Therefore, the capacitor that has a sufficient margin of the rated voltage against the output voltage and superior temperature characteristics, is recommended for CO.

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*Soft-start function

The capacitor Cs, that is connected between CS pin and GND, controls the following: The rising time of output voltage. The inrush current at start-up.

When the soft start function is not used, CS pin should be open.

1. Cs capacitance vs rise time of output voltage The rise time of output voltage is calculated as follows: Δt (ms) 213 x Cs(μF)

0

50

100

150

200

250

0 0.2 0.4 0.6 0.8 1 1.2

Cs capacity vs risetime of output voltage

rise

time

of o

utpu

t vol

tage

: t (

mS)

Cs capacity : Cs( F)

@:Ta=25oC V IN=6V C IN=0.1 F Co=1 F(Ceramic) Io=0mA

2. Inrush current at start-up

The peak value of the inrush current can be limited according to the capacitance of the Cs. Inrush current wave :

Cs=0μF(Open) : IPEAK =150μA Cs=0.0047μF : IPEAK =20μA Peak current: 150mA at CS=0μF Peak current: 20mA at CS=0.0047μF This characteristic is one example. It is necessary to examine the characteristic with an actual circuit ٭

because there is an influence by the characteristic such as output voltage/output capacitor.

Vin=Vo-1V Cin=0.1μF(Ceramic) Co=1μF(Ceramic) Io=0mA

Vin=Vo-1V Cin=0.1μF(Ceramic) Co=1μF(Ceramic) Io=0mA

Inrush current Inrush current

Output Voltage Output Voltage Control ON Control ON

50mA/div

20mA/div

NJM2828

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POWER DISSIPATION vs. AMBIENT TEMPERATURE

NJM2828F3 Power Dissipation(Topr=-40～+85℃,Tj=125℃)

0

100

200

300

400

500

-50 -25 0 25 50 75 100Ambient Temperature Ta(℃)

Pow

er D

issi

patio

n P D

(mW

)

On Board(114.3×76.2×1.6mm, FR-4)

NJM2828

- 8 - Ver.2016-05-10

ELECTRICAL CHARACTERISTICS

6.7

6.8

6.9

7

7.1

7.2

6.7 6.8 6.9 7 7.1 7.2 7.3 7.4 7.5

Out

put V

olta

ge :

Vo(V

)

Input Voltage : VIN(V)

NJM2828/-7.0VOutput Voltage vs. Input Voltage

@:Ta=25oC Co=1.0 F(Ceramic)

Io=0A

Io=30mA

Io=100mA

0

1

2

3

4

5

6

7

8

0 50 100 150 200

Out

put V

olta

ge :

Vo(V

)

NJM2828/-7.0VOutput Voltage vs. Output Current

@:Ta=25oC V IN=-8.0V Co=1.0 F(Ceramic)

Output Current : Io(mA)

0

2

4

6

8

10

0 20 40 60 80 100 120

Gro

und

Pin

Cur

rent

: IGN

D (m

A)

NJM2828/-7.0VGround Pin Current v.s. Output Current

@:Ta=25oC VIN=-8.0V Co=1.0 F(Ceramic)

Output Current : IO(mA)

0

0.05

0.1

0.15

0.2

0.25

0.3

0 20 40 60 80 100 120Output Current:Io(mA)

@:Ta=25oC Co=1.0 F(Ceramic) Vcont=3.0V

Dro

pout

Vol

tage

:dVI-

O (V

)NJM2828/-7.0V

Dropout Voltage vs. Output Current

0

5

10

15

20

25

30

0 1 2 3 4 5

Con

trol

Cur

rent

: I C

ont(

A)

Control Voltage : VCont

(V)

NJM2828/-7.0VControl Current vs. Control Voltage

@:Ta=25oC VIN=-8.0V Co=1.0 F(Ceramic) Io=30mA

Rc=0

Rc=50k

Rc=100k

0

1

2

3

4

5

6

7

8

0 0.5 1 1.5 2 2.5 3

Out

put V

olta

ge :

Vo(V

)

Control Voltage : VCont

(V)

NJM2828/-7.0VOutput Voltage vs. Control Voltage

@:Ta=25oC VIN=-8.0V Co=1.0 F(Ceramic) Io=30mA

Rc=0

Rc=50k

Rc=100k

NJM2828

- 9 - Ver.2016-05-10

ELECTRICAL CHARACTERISTICS

-60

-50

-40

-30

-20

-10

0

0 20 40 60 80 100 120

Load

Reg

ulat

ion

: dVo

/dIo

(mV)

Output Current : Io(mA)

NJM2828/-7.0VLoad Regulation vs. Output Current

@:Ta=25oC VIN=-8.0V Co=1.0 F(Ceramic)

0

50

100

150

200

8 9 10 11 12 13 14

Peak

Out

put C

urre

nt :

IoMA

X(m

A)

NJM2828/-7.0VPeak Output Current vs. Input Voltage

@:Ta=25oC Co=1.0 F(Ceramic) Vcont=3.0V

Input Voltage : VIN(V)

0

500

1000

1500

2000

0 2 4 6 8 10 12 14

Qui

esce

nt C

urre

nt :

IQ (

A)

NJM2828/-7.0VQuiescent Current v.s. Input Voltage

@:Ta=25oC Output is open. Co=1.0 F(Ceramic) Vcont=3.0V

Input Voltage : VIN(V)

0

20

40

60

80

100

120

Output Current : Io(mA)

Out

put N

oise

Vol

tage

: Vn

(Vr

ms)

NJM2828/-7.0VOutput Noise Voltage vs. Output Current

@:Ta=25oC VIN=-8.0V Co=1.0 F

0.001 0.01 0.1 1 10 100

LPF:80kFLAT

20

30

40

50

60

70

80

90

100

10 100 1000 104 105

Rip

ple

Rej

ectio

n R

atio

: R

R (d

B)

Frequency : f (Hz)

NJM2828/-7.0VRipple Rejection Ratio v.s. Frequency

Io=0mA

@:Ta=25oC VIN=-8.0V ein=200mVrms Co=1.0 F(Ceramic)

10 100 1k 10k 100k

Io=30mA

Io=100mA

20

30

40

50

60

70

80

90

100

0.001 0.01 0.1 1 10 100Output Current : Io(mA)

Rip

ple

Rej

ectio

n : R

R (d

B)

NJM2828/-7.0VRipple Rejection vs. Output Current

f=1kHz

f=10kHz

@:Ta=25oC V IN=-8.0V ein=200mVrms Co=1.0 F(Ceramic)

NJM2828

- 10 - Ver.2016-05-10

ELECTRICAL CHARACTERISTICS

0.01

0.1

1

10

100

0.001 0.01 0.1 1 10 100Output Current : Io(mA)

@:Ta=25oC Co=1.0 F(Ceramic)

Equi

vale

nt S

eris

e R

esis

tanc

e : E

SR(

)

NJM2828/-7.0VEquivalent Serise Resistance vs. Output Current

STABLE REGION

0

0.05

0.1

0.15

0.2

0.25

0.3

-50 0 50 100 150Temperature : Ta (oC)

@:Io=60mA Co=1 F(Ceramic)

NJM2828/-7.0VDropout Voltage v.s. Temperature

Dro

pout

Vol

tage

:dVI

-O (V

)

0

0.5

1

1.5

2

-50 0 50 100 150

Con

trol

Vol

tage

: VC

ON

T(O

N) (

V)

Temperature : Ta (oC)

NJM2828/-7.0VControl Voltage v.s. Temperature

@:VIN=-8.0V Io=30mA Co=1.0 F(Ceramic)

6.8

6.9

7

7.1

7.2

-50 0 50 100 150

Out

put V

olta

ge V

o (V

)

Temperature Ta (oC)

NJM2828/-7.0VOutput Voltage v.s. Temperature

@:VIN=-8.0V Io=30mA Co=1.0 F(Ceramic)

0

2

4

6

8

10

-50 0 50 100 150

CS

Cha

rge

Cur

rent

: ICS

(A

)

Temperature : Ta (oC)

NJM2828/-7.0VCS Charge Current v.s. Temperature

@:VIN=-8.0V CS is short to ground. Co=1.0 F(Ceramic)

0

2

4

6

8

10

-50 0 50 100 150

NJM2828/-7.0VControl Current v.s. Temperature

Temperature : Ta ( oC)

@:VCONT=3.0V Co=1.0uF(Ceramic)

NJM2828

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ELECTRICAL CHARACTERISTICS

0

50

100

150

200

250

-50 0 50 100 150

Qui

esce

nt C

urre

nt :

IQ (

A)

Temperature : Ta (oC)

NJM2828/-7.0VQuiescent Current v.s. Temperature

@:VIN=-8.0V Output is open. Co=1.0 F(Ceramic)

Iq+Icont

Iq

-0.1

-0.05

0

0.05

0.1

-50 0 50 100 150

Line

Reg

ulat

ion

: dVo

/dIo

(%/V

)

Temperature : Ta (oC)

NJM2828/-7.0VLine Regulation v.s. Temperature

@:dVIN=-8-12V Io=30mA Co=1.0 F(Ceramic)

0

0.005

0.01

0.015

0.02

0.025

0.03

-50 0 50 100 150

Load

Reg

ulat

ion

: dVo

/dIo

(%/m

A)

Temperature : Ta (oC)

NJM2828/-7.0VLoad Regulation v.s. Temperature

@:VIN=-8.0V Io=0-60mA Co=1.0 F(Ceramic)

0

2

4

6

8

-50 0 50 100 150 200

Out

put V

olta

ge V

o (V

)

Temperature Ta (oC)

NJM2828/-7.0VOutput Voltage v.s. Temperature

@:VIN=-8.0V Io=30mA Co=1.0 F(Ceramic)

0

50

100

150

200

-50 0 50 100 150

Shor

t Cir

cuit

Cur

rent

: ISC

(mA

)

Temperature : Ta (oC)

NJM2828/-7.0VShort Circuit Current v.s. Temperature

@:VIN=-8.0V Output is short to ground. Co=1.0 F(Ceramic)

NJM2828

- 12 - Ver.2016-05-10

ELECTRICAL CHARACTERISTICS

-7.04

-7.02

-7

-6.98

-6.96

-6.94

-6.92

-6.9

-6.88

-14

-13

-12

-11

-10

-9

-8

-7

-6

0 0.4 0.8 1.2 1.6 2

NJM2828_-7.0VLine Transient Response

Out

put V

olta

ge :

Vo [V

]

Time : t [mS]

Input Voltage

Output Voltage

@:Ta=25oC VDD=-8.0V Co=1.0 F(Ceramic) Io=30mA

Inpu

t Vol

tage

: V

IN [V

]

-7.06

-7.04

-7.02

-7

-6.98

-6.96

-6.94

-6.92

-6.9

-250

-200

-150

-100

-50

0

50

100

150

0 40 80 120 160 200

NJM2828_-7.0VLoad Transient Response

Out

put V

olta

ge :

Vo [V

]

Time : t [ S]

Output Current

Output Voltage

@:Ta=25oC VDD=-8.0V Co=1.0 F(Ceramic)

Out

put C

urre

nt :

Io [m

A]

-10

-8

-6

-4

-2

0

2

4

6

-12

-10

-8

-6

-4

-2

0

2

4

0 10 20 30 40 50

NJM2828_-7.0VON/OFF Transient Response without Load

Out

put V

olta

ge :

Vo [V

]

Con

trol

Vol

tage

: V

o [V

]

Time : t [ms]

Control Voltage

Output Voltage

@:Ta=25oC VDD=-8.0V Co=1.0 F(Ceramic) Cs=0.047 F Io=0mA

[CAUTION] The specifications on this databook are only

given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.