NJM2870
LOW DROPOUT VOLTAGE REGULATOR
! GENERAL DESCRIPTION ! PACKAGE O UTLINE
The NJM2870 is low dropout voltage regulator designed
for cellular phone applicat ion.
Advanced Bipolar technology achieves low noise, high
ripple reject ion and low quiescent current.
! FEATURES
"High Rippl e Reject io n 56dB ≤ RR (DC < f < 60kHz)
66dB typ. (f=100Hz)
60dB typ. (f=1kHz)
"Output Noise Volt age Vno=30µV typ.(Cp=0. 01µF)
"Output Curre nt Io(max.)=150 mA
"High Precision Output Vo±2%
"Low Dro pout Voltage ∆V
I
-
O
=0.12V typ. (Io=60mA, Vo≥1.8V)
"Input Voltage range +2∼+14V (Vo=1.5V Version)
"ON/OFF Co nt rol (Active High)
"Output capacitor with 4.7uF ceramic cap acitor
"Internal Short C ircuit Current Limit
"Internal Thermal Overlo ad Protection
"Bipolar Technology
"Package Outline SOT-23-5
! PIN CONFIGURATION
NJM2870F
! EQUIVALENT CIRCUIT
NJM2870F
PIN FUNCTION
1. CO NTROL (Active High)
2. GND
3. NOISE BYP ASS
4. V
OUT
5. V
IN
V
OUT
GND
V
IN
Thermal
Protection
Bandgap
Reference Noise
Bypass
Cont
1
2
3
45
NJM2870
! ABSOLUTE MAXIMUM RATING S(Ta=25°C)
PARAMETER SYMBOL RATINGS UNIT
Input Voltage V
IN
+14 V
Control Voltage V
CONT
+14(*1) V
350(*2)
Power Dissi pat ion P
D
SOT-23-5 200(*3) mW
Operating Temperat ure Topr −40 ∼ +85 °C
S torag e Temperature Tstg −40 ∼ +125 °C
(*1) When input v o ltage is less t han +14V, the absolute maximum control volt age is equal to t he input voltage.
(*2): Mounted on glass epoxy board bas ed on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers)
(*3): Device itself.
! ELECTRICAL CHARACTERISTICS (V
IN
=Vo+1V, C
IN
=0.1µF, Co=4.7µF, Cp=0.01µF, Ta=25°C)
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Output Voltage Vo Io=30mA −2% − +2% V
Quiescent Current I
Q
Io=0mA, expect Icont − 200 300 µA
Quiescent Current
at Contro l O FF I
Q(OFF)
V
CONT
=0V − − 100 nA
Output Curre nt Io Vo−0.3V 150 200 − mA
Line Re gulation ∆Vo/∆V
IN
V
IN
=Vo+1V ∼ Vo+6V, Io=30mA − − 0.10 %/V
Load Regu latio n ∆Vo/∆Io Io=0 ∼ 100mA − − 0.03 %/mA
Dropout Voltage ∆V
I
-
O
Io=60mA − 0.12 0.2 V
Ripple Rej ecti on RR ein=200 mVrms,f=1 kHz, Io=10 mA
V
IN
=Vo+2V, Vo=3V Versio n − 60 − dB
Av erage Temperature
Coefficient of O utput Volta ge ∆Vo/∆Ta Ta=0∼85°C, Io=10mA,
Vo=3V Version − 0.2 − mV/°C
Output Noise Volt age V
NO
f=10Hz∼80kHz, Io=10mA,
Vo=3V Version − 30 − µVrms
Control Voltage for ON-state V
CONT(ON)
1.6 − − V
Control Voltage for OFF-state V
CONT(OFF
)
− − 0.6 V
The abov e specificatio n is a common specification f or all output voltages.
Therefor e, it may be different from the individual specification for a specific output voltage.
! ELECTRICAL CHARACTERISTICS
(Vo=1.5V Version, V
IN
=2.4V, C
IN
=0.1µF, Co=4.7µF, Cp=0.01µF, Ta=25°C)
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Output Voltage Vo Io=30mA −2% − +2% V
Quiescent Current I
Q
Io=0mA, expect Icont − 200 300 µA
Quiescent Current
at Contro l O FF I
Q(OFF)
V
CONT
=0V − − 100 nA
Output Curre nt Io Vo−0.3V 150 200 − mA
Line Re gulation ∆Vo/∆V
IN
V
IN
=Vo+1V ∼ Vo+6V, Io=30mA − − 0.10 %/V
Load Regu latio n ∆Vo/∆Io Io=0 ∼ 100mA − − 0.03 %/mA
Ripple Rej ecti on RR ein=200 mVrms,f=1 kHz, Io=10 mA
V
IN
=Vo+2V − 64 − dB
Av erage Temperature
Coefficient of O utput Volta ge ∆Vo/∆Ta Ta=0∼85°C, Io=10mA − 0.13 − mV/°C
Output Noise Volt age V
NO
f=10Hz∼80kHz, Io=10mA, − 15 − µVrms
Control Voltage for ON-state V
CONT(ON)
1.6 − − V
Control Voltage for OFF-state V
CONT(OFF
)
− − 0.6 V
NJM2870
! OUTPUT VOLTAGE RANK LIST
Device Name V
OUT
Device Name V
OUT
Device Name V
OUT
NJM2870F15 1.5V NJM2870F27 2.7V NJM2870F35 3.5V
NJM2870F18 1.8V NJM2870F28 2.8V NJM2870F36 3.6V
NJM2870F19 1.9V NJM2870F285 2.85V NJM2870F38 3.8V
NJM2870F02 2.0V NJM2870F29 2.9V NJM2870F04 4.0V
NJM2870F21 2.1V NJM2870F03 3.0V NJM2870F45 4.5V
NJM2870F23 2.3V NJM2870F31 3.1V NJM2870F46 4.6V
NJM2870F24 2.4V NJM2870F32 3.2V NJM2870F47 4.7V
NJM2870F25 2.5V NJM2870F33 3.3V NJM2870F48 4.8V
NJM2870F26 2.6V NJM2870F34 3.4V NJM2870F05 5.0V
! TEST CIRCUI T
NJM2870
V
IN
V
IN
V
OUT
CONTROL NOISE
BYPASS
GND
0.1
µ
F
I
IN
I
CONT
V
CONT
Cp=0.01µF
4.7
µ
F
I
OUT
V
OUT
V
V
A
A
+ +
(tantalum)
NJM2870
! TYPICAL APPLICATION
1
In case that O N/O FF Control is not required:
NJM2870
V
IN
V
OUT
CONTROL NOISE
BYPASS
GND
0.1
µ
F
Cp=0.01µF
4.7
µ
F
V
OUT
V
IN
R
(0 ∼ 300kΩ)
(ceramic or tantalum)
Connect control termi nal to V
IN
terminal
2
In use of ON/OFF CONTROL:
NJM2870
V
IN
V
OUT
CONTROL NOISE
BYPASS
GND
0.1
µ
F
Cp=0.01µF
V
OUT
V
IN
R
4.7
µ
F
(ceramic or tantalum)
State of control terminal:
•“H”→ output is enabled.
• “L” or “open” → output is disabled.
%Noise bypass Capacitanc e Cp
Noise by pass capacitance Cp reduces n oise generat ed by band-gap reference circuit. Noise level and
ripple rejection will be i mp r oved when larger Cp is used. Use of smaller Cp value may cause oscillat ion.
Use the Cp value of 0.01µF greater to av oid t he problem.
%In the case o f using a resistance "R" between V
IN
and control.
The current f low int o t he control terminal while the IC is ON state (I
CONT
) can be reduced when a pull up
resist ance "R" is inserted bet ween V
IN
and the control terminal.
The minimum control voltage for ON state (V
CONT (ON)
) is increased due to the volt age drop caused by
I
CONT
and the resistance "R". The I
CONT
is temperatur e dependence as shown in the "Cont r ol C urrent vs.
Temperature" characteri st i cs. Therefore, the resistan ce "R" should be careful ly sel ect ed t o ensure the
control voltage exceeds the V
CONT (ON)
over the required temperature ra nge.
NJM2870
! POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2870F Power Dissipat ion
(Topr=-40～+85℃,Tj=125℃,P
D
=200mW(Ta≦25℃))
0
100
200
300
400
500
-50 -25 0 25 50 75 100
Ambient Temperature Ta( ℃)
P
ower
Di
ss
i
pat
i
on
P
D
(
m
W)
Device itself
On Board(114.3×76.2×1. 6mm, FR -4)
NJM2870
! TYPICAL CHARACTERISTICS
NJM2870
! TYPICAL CHARACTERISTICS
NJM2870
! TYPICAL CHARACTERISTICS
0
7.5
15
22.5
30
-50 0 50 100
Control Current : I
CONT
( µ
µ
µ
µA)
Temper ature Ta (
o
C)
NJM2870_3.0V
Cont rol Current v.s. Temperatu re
@:V
IN
=4V
NJM2870
[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.
