ROHM BD7004NUX Technical data
CMOS LDO Regulator for Portable Equipments
Dual, Low-Dropout
Linear Regulator
BD7003NUX, BD7004NUX
●Descriptions
The BD7003NUX, BD7004NUX are dual channels, 300mA low-dropout voltage regulator output at each channel. The output
voltage range is from 1.2V to 3.3V by operating range from 2.5V to 5.5V. The output voltages, VOUT1 and VOUT2, are
determined at power up by the state of P1 and P2(see the table of “Output-Voltage Programming”). The BD7003NUX,
BD7004NUX offer 1.8% accuracy and low-dropout. The shutdown current is near the zero current which is suitable for
battery powered device. The BD7003NUX, BD7004NUX are mounted on VSON008X2020(2.0mmX2.0mmX0.6mm), which
contributes to the space-saving design of set.
●Features
1) 2-channel 300mA, CMOS-type LDOs.
2) Pin-Programmable Output Voltage.
(9 steps adjustable VO；See the Table of “Output-Voltage Programming”.)
3) LDOs Power ON/OFF Enable Control.
4) 2.0mm×2.0mm Package.
5) Small Ceramic Output Capacitors(1μF).
6) Equipped with Over Current Limiter and Thermal Shutdown Circuit(TSD) .
●Applications
Battery-powered portable equipment, etc.
No.12020ECT09
●Absolute Maximum Ratings (T a = 25℃)
Parameter Symbol Ratings Unit
Maximum Supply Voltage (VIN) VIN -0.3 ～ 7 V
Maximum Input Voltage 1 (P1,P2,EN1,EN2) VINMAX1 -0.3 ～ 7 V
Maximum Input Voltage 2 (Vout1,Vout2) VINMAX2 -0.3～Vin+0.3 V
Power Dissipation Pd 1360*1 mW
Operating Temperature Range Topr -40 ～ +85 ℃
Storage Temperature Range Tstg -55 ～ +150 ℃
*1 This is the allowable loss of when it is mounted on a ROHM specification board 40mm×40mm×1.5mmt
To use at temperature higher than 25C , derate 10.9mW per 1℃
* This product is not especially designed to be protected from radioactivity.
●Recommended Operating Range (Ta=-40～+85℃)
Parameter Symbol Ratings Unit
Input Power Supply Voltage Range VIN 2.5～5.5 V
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1/13
2012.01 - Rev.C
BD7003NUX,BD7004NUX
Technical Note
●Power Dissipation
As for power dissipation, an approximate estimate of the heat reduction characteristics and internal power consumption of IC
are shown, so please use these for reference. Since power dissipation changes substantially depending on the
implementation conditions (board size, board thickness, metal wiring rate, number of layers and t hrough holes, etc.), it is
recommended to measure Pd on a set board. Exceeding the power dissipation of IC may lead to deterioration of the original
IC performance, such as causing operation of the thermal shutdown circuit or reduction in current capability. Therefore, be
sure to prepare sufficient margin within power dissipation for usage.
Calculation of the maximum internal power consumption of IC (PMAX)
PMAX=(VIN-VOUT)×IOUT(MAX.)
(VIN: Input voltage VOUT: Output voltage IOUT(MAX): Maximum output current)
Measurement conditions
Layout of Board for
Measurement
(Unit: mm)
IC
Implementation
Position
Power Dissipation 1.36W
Thermal Resistance θja=91.9℃/W
1.6
Evaluation Bor d1
1.4
1.36W
1.2
1.0
0.8
0.6
Power Dissipation : Pd (W)
0.4
0.2
0.0
0 25 50 75 100 125 150 175 20 0
Fig.1. VSON008X2020 Power dissipation heat reduction characteristics (Reference)
* Please design the margin so that PMAX becomes is than Pd (PMAXPd)
within the usage temperature range.
Evaluation Board 1 (Double-side Board)
Top Layer (Top View)
Bottom Layer (Top View)
Amb ien t Temper at ure : Ta (℃)
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2/13
2012.01 - Rev.C
BD7003NUX,BD7004NUX
Technical Note
●Electrical Characteristics (Vin=3.7V, EN1=EN2=Vin,Ta =+25℃, unless otherwise noted.)
Parameter Symbol
Output Voltage range VOUT 1.2 - 3.3 V
Input Voltage range VIN 2.5 - 5.5 V
Output Voltage Accuracy
Maximum Output Current Imax 300 - - mA
Short Circuit Current Isc - 150 - mA VOUT = 0V
Ground Pin Current Iq
Dropout Voltage Vdrop
Line Regulation ΔVLNR - 0.02 0.2 %/V VIN=VOUT+1V to VIN=5.5V, Iout=10mA
Load Regulation ΔVLDR - 0.2 0.6 % Iout=1mA to 300mA
Ripple Rejection PSRR - 66 - dB f=100Hz,Iout=10mA@VOUT=1.5V
Output Noise en - 150 - μVrms fBW=10Hz to 100kHz;Iout=10mA
Δvouta -1.8 - 1.8 % Iout=1mA, VOUT≧1.5V
Δvoutb -30 - +30 mV Iout=1mA, VOUT=1.2V
Min Typ Max
Limits
- 55 95
- 35 65 One LDO shutdown, Iout=0mA
- 120 170
- 90 140 VIN=2.7V, VOUT=2.8V, Iout=100mA
80 130 VIN=2.9V, VOUT=3.0V, Iout=100mA
- 70 120 VIN=3.2V, VOUT=3.3V,Iout=100mA
- 360 510 VIN=2.5V, VOUT=2.6V, Iout=300mA
- 270 420 VIN=2.7V, VOUT=2.8V, Iout=300mA
240 390 VIN=2.9V, VOUT=3.0V, Iout=300mA
- 210 360 VIN=3.2V, VOUT=3.3V, Iout=300mA
Unit Condition
Iout=0mA
μA
VIN=2.5V, VOUT=2.6V, Iout=100mA
mV
●EN1, EN2
Enable Input Threshold
Enable Input Leakage Current Ien - 0.1 1 μA Ven=VIN , Ta=+25℃
Shutdown Supply Current IQSHDN - 0.1 1 μA Vout=0V , Ta=+25℃
*This product is not especially designed to be protected from radioactivity.
PIN Name
Set up
Output Voltage Programming Input (P1、P2)
Output voltages, VOUT1 and VOUT2, are determined at power up by the state of P1 and P2 (see the table of
“Output-Voltage Programming”). Subsequent charges to P1 and P2 do not change the output voltages unless the supply
power is cycled, or all EN inputs are simultaneously driven low to shutdown the device.
Shutdown (EN1, EN2)
The BD7003NUX, BD7004NUX have independ ent shutdown control inputs, EN1 and EN2. Driving both EN1 and EN2
low will shut down the entire device, reducing supply current to 1μA max. Connecting EN1 and EN2 to a logic-high or
VIN will enable the corresponding output(s). It is prohibited to open EN1, EN2 switches.
ViH 1.2 - ViL - - 0.5 Regulator shutdown
Output-Voltage Programming
BD7003NUX BD7004NUX
P1 P2 VOUT1 VOUT2 VOUT1 VOUT2
OPEN OPEN 1.50 2.80 1.20 1.50
OPEN GND 1.80 2.60 1.20 1.80
OPEN VIN 1.80 2.70 1.80 1.50
GND OPEN 1.80 2.80 1.80 1.80
GND GND 1.80 2.90 1.80 3.00
GND VIN 2.60 2.80 1.80 3.30
VIN OPEN 2.80 2.80 2.80 3.00
VIN GND 2.90 2.90 3.00 3.00
VIN VIN 2.80 3.30 3.30 3.30
Regulator enabled
V
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3/13
2012.01 - Rev.C
BD7003NUX,BD7004NUX
●Typical Application Circuit
Technical Note
BD7003NUX, BD7004NUX
VIN
CIN
1μF
VIN
P1
VOUT1
OUT1
C
1μF
P2
VIN
VIN
EN1
EN2
GND
VOUT2
COUT2
1μF
Figure2. Application Circuit
*It is prohibited to open EN1, EN2 switches.
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4/13
2012.01 - Rev.C
BD7003NUX,BD7004NUX
●Package Dimensions (VSON008X2020)
●Pin Descriptions
Device name
Lot No.
Technical Note
[Unit: mm]
Device name Marking
BD7003NUX BD7003
BD7004NUX BD7004
PIN description (Top View)
Note : Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
PIN No. Name I/O
1 VIN I - O Voltage Supply
2 EN1 I - O Enable Input1
3 P2 I O O Control Output-Voltage PIN2
4 P1 I O O Control Output-Voltage PIN1
5 EN2 I - O Enable Input2
6 GND - O - GND PIN
7 VOUT2 O - O LDO1 Output1
8 VOUT1 O - O LDO2 Output2
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ESD Diode
IN GND
5/13
Function
2012.01 - Rev.C
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