Burr-Brown DCR012405U1K Miniature, 1w isolated regulated dc/dc converter Datasheet

DCR
DCR01
Series
01
DCR
01
SBVS013C – OCTOBER 2001 – REVISED MAY 2003
Miniature, 1W Isolated
REGULATED DC/DC CONVERTERS
FEATURES
APPLICATIONS
● UL1950 RECOGNIZED
●
●
●
●
● DIP-18, SO-28
● 53W/in3 (3.3W/cm3) POWER DENSITY
● DEVICE-TO-DEVICE SYNCHRONIZATION
POINT-OF-USE POWER CONVERSION
DIGITAL INTERFACE POWER
GROUND LOOP ELIMINATION
POWER-SUPPLY NOISE REDUCTION
● THERMAL PROTECTION
● 1000Vrms ISOLATION
DESCRIPTION
● 400kHz SWITCHING
The DCR01 family is a series of high-efficiency, inputisolated, output-regulated DC/DC converters. In addition to
1W nominal, galvanically-isolated output power capability,
this range of DC/DCs offer very low output noise, thermal
protection, and high accuracy.
The DCR01 family is implemented in standard molded IC
packaging, giving standard JEDEC outlines suitable for
high-volume assembly.
The DCR01 is manufactured using the same technology
as standard IC packages, thereby achieving very high reliability.
● 125 FITS AT 55°C
● ±10% INPUT RANGE
● SHORT-CIRCUIT PROTECTED
● 5V, 12V, 24V INPUTS
● 3.3V, 5V OUTPUTS
● HIGH EFFICIENCY
VREC
SYNC
ENABLE
VS
Input
Controller
LDO
Regulator
ERROR
VOUT
0VIN
0VOUT
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright © 2000-2003, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
ELECTROSTATIC
DISCHARGE SENSITIVITY
ABSOLUTE MAXIMUM RATINGS
Input Voltage:
DCR0105 ............................................................................................ 7V
DCR0112 .......................................................................................... 15V
DCR0124 .......................................................................................... 29V
Storage Temperature ...................................................... –60°C to +125°C
Lead Temperature (soldering, 10s) ................................................. 270°C
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ORDERING INFORMATION
DCR01
05
05
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
(P)
Basic Model Number: 1W Product
Voltage Input:
5V In
Voltage Output:
5V Out
Package Code:
P = 18-Pin Plastic DIP, U = 28-Pin SO
PACKAGE/ORDERING INFORMATION
PRODUCT
DCR010503P
DCR010503U
DCR010505P
DCR010505U
DCR011203P
DCR011203U
DCR011205P
DCR011205U
DCR012403P
DCR012403U
DCR012405P
DCR012405U
2
PACKAGE-LEAD
PACKAGE
DESIGNATOR
DIP-18
SO-28
DIP-18
SO-28
DIP18
SO-28
DIP-18
SO-28
DIP-18
SO-28
DIP-18
SO-28
NVE
DVB
NVE
DVB
NVE
DVB
NVE
DVB
NVE
DVB
NVE
DVB
SPECIFIED
TEMPERATURE
RANGE
–40°C
–40°C
–40°C
–40°C
–40°C
–40°C
–40°C
–40°C
–40°C
–40°C
–40°C
–40°C
to
to
to
to
to
to
to
to
to
to
to
to
+85°C
+85°C
+85°C
+85°C
+85°C
+85°C
+85°C
+85°C
+85°C
+85°C
+85°C
+85°C
PACKAGE
MARKING
ORDERING
NUMBER
DCR010503P
DCR010503U
DCR010505P
DCR010505U
DCR011203P
DCR011203U
DCR011205P
DCR011205U
DCR012403P
DCR012403U
DCR012405P
DCR012405U
DCR010503P
DCR010503U/1K
DCR010505P
DCR010505U/1K
DCR011203P
DCR011203U/1K
DCR011205P
DCR011205U/1K
DCR012403P
DCR012403U/1K
DCR012405P
DCR012405U/1K
TRANSPORT
MEDIA, QUANTITY
Rails, 20
Tape and Reel,
Rails, 20
Tape and Reel,
Rails, 20
Tape and Reel,
Rails, 20
Tape and Reel,
Rails, 20
Tape and Reel,
Rails, 20
Tape and Reel,
1000
1000
1000
1000
1000
1000
DCR01 Series
SBVS013C
ELECTRICAL CHARACTERISTICS
At TA = +25°C, VS = nominal, IO = 10mA, CO = 0.1µF, unless otherwise specified.
DCR01 SERIES
PARAMETER
CONDITIONS
OUTPUT
Setpoint
DCR010503
DCR010505
DCR011203
DCR011205
DCR012403
DCR012405
Setpoint Accuracy
Maximum Output Current
DCR010503P
DCR010503U
DCR010505P
DCR010505U
DCR011203P
DCR011203U
DCR011205P
DCR011205U
DCR012403P
DCR012403U
DCR012405P
DCR012405U
Output Short-Circuit Protected
Line Regulation
DCR010503
DCR010505
DCR011203
DCR011205
DCR012403
DCR012405
Over Line and Load
DCR010503
DCR010505
DCR011203P
DCR011203U
DCR011205
DCR012403P
DCR012403U
DCR012405
Versus Temperature
Ripple and Noise
MIN
TYP
3.3
5
3.3
5
3.3
5
0.5
MAX
UNITS
2.0
V
V
V
V
V
V
%
300
300
200
200
390
300
200
200
390
300
200
200
Duration
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
Infinite
1
1
1
1
1
1
10mA to 300mA Load, 4.5V to
10mA to 200mA Load, 4.5V to
10mA to 390mA Load, 10.8V to
10mA to 300mA Load, 10.8V to
10mA to 200mA Load, 10.8V to
10mA to 390mA Load, 21.6V to
10mA to 300mA Load, 21.6V to
10mA to 200mA Load, 21.6V to
–40°C to +85°C
5.5V Line
5.5V Line
13.2V Line
13.2V Line
13.2V Line
26.4V Line
26.4V Line
26.4V Line
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
mV/V
mV/V
mV/V
mV/V
mV/V
mV/V
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
%
%
%
%
%
%
%
%
%
DCR010503P
DCR010503P
DCR010503U
DCR010503U
Ripple
Noise
Ripple
Noise
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
5
35
8
23
mVp-p
mVp-p
mVp-p
mVp-p
DCR010505P
DCR010505P
DCR010505U
DCR010505U
Ripple
Noise
Ripple
Noise
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
6
20
9
20
mVp-p
mVp-p
mVp-p
mVp-p
DCR011203P
DCR011203P
DCR011203U
DCR011203U
Ripple
Noise
Ripple
Noise
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
10
54
8
22
mVp-p
mVp-p
mVp-p
mVp-p
DCR011205P
DCR011205P
DCR011205U
DCR011205U
Ripple
Noise
Ripple
Noise
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
6
45
6
21
mVp-p
mVp-p
mVp-p
mVp-p
DCR012403P
DCR012403P
DCR012403U
DCR012403U
Ripple
Noise
Ripple
Noise
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
10
22
8
22
mVp-p
mVp-p
mVp-p
mVp-p
DCR012405P
DCR012405P
DCR012405U
DCR012405U
Ripple
Noise
Ripple
Noise
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
20MHz Bandwidth, 50% Load(1)
100MHz Bandwidth, 50% Load(1)
10
22
13
32
mVp-p
mVp-p
mVp-p
mVp-p
DCR0105xx
DCR0112xx
DCR0124xx
5
12
24
V
V
V
%
INPUT
Nominal Voltage (VS)
Voltage Range
DCR01 Series
SBVS013C
–10
+10
3
ELECTRICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VS = nominal, IO = 10mA, CO = 0.1µF, unless otherwise specified.
DCR01 SERIES
PARAMETER
Supply Current
DCR010503P
DCR010503U
DCR010505P
DCR010505U
DCR011203P
DCR011203U
DCR011205P
DCR011205U
DCR012403P
DCR012403U
DCR012405P
DCR012405U
Reflected Ripple Current
ISOLATION
Voltage
CONDITIONS
MIN
ERROR FLAG
Logic High Open Collector Leakage
Logic Low Output Voltage
MAX
UNITS
IO = 0mA
IO = 10mA
IO = 300mA
IO = 0mA
IO = 10mA
IO = 300mA
18
28
335
24
33
339
mA
mA
mA
mA
mA
mA
IO = 0mA
IO = 10mA
IO = 200mA
IO = 0mA
IO = 10mA
IO = 200mA
25
40
306
25
40
306
mA
mA
mA
mA
mA
mA
IO = 0mA
IO = 10mA
IO = 390mA
IO = 0mA
IO = 10mA
IO = 390mA
13
17
173
13
17
136
mA
mA
mA
mA
mA
mA
IO = 0mA
IO = 10mA
IO = 200mA
IO = 0mA
IO = 10mA
IO = 200mA
13
18
125
14
19
123
mA
mA
mA
mA
mA
mA
IO = 0mA
IO = 10mA
IO = 390mA
IO = 0mA
IO = 10mA
IO = 390mA
17
18
97
15
17
75
mA
mA
mA
mA
mA
mA
IO = 0mA
IO = 10mA
IO = 200mA
IO = 0mA
IO = 10mA
IO = 200mA
20MHz Bandwidth, 100% Load
CIN = 2.2µF, CFILTER = 1µF
15
18
69
15
18
67
8
mA
mA
mA
mA
mA
mA
mAp-p
25
kVrms
kVrms
pF
1s Flash Test
60s Test, UL1950(2)
1
1
Input/Output Capacitance
OUTPUT ENABLE CONTROL
Logic High Input Voltage
Logic High Input Current
Logic Low Input Voltage
Logic Low Input Current
VREC
VREC
TYP
2.0
2.0 < VENABLE < VREC
VREC
100
–0.2
0 < VENABLE < 0.5
All 3.3V Outputs
All 5V Outputs
0.5
100
3.3
5
VERROR = 5V
Sinking 2mA
10
0.4
THERMAL SHUTDOWN
Junction Temperature
Temperature Activated
Temperature Deactivated
720
720
2.5
0
TEMPERATURE RANGE
Operating
–40
800
2.5
µA
V
°C
°C
150
130
SYNCHRONIZATION PIN
Max External Capacitance on SYNC Pin
Internal Oscillator Frequency
External Synchronization Frequency
External Synchronization Signal High
External Synchronization Signal Low
V
nA
V
nA
V
V
3
880
880
5.0
0.4
pF
kHz
kHz
V
V
+85
°C
NOTES: (1) CIN = 2.2µF, CFILTER = 1µF, COUT = 0.1µF. (2) During UL approval only.
4
DCR01 Series
SBVS013C
PIN CONFIGURATIONS
Top View
SO
DIP
VS
1
18 SYNC
VS
1
28 SYNC
NC
2
17 0VIN
VS
2
27 0VIN
NC
3
26 0VIN
DCR01
DCR01U
VREC
7
12 ERROR
VREC 12
17 ERROR
0VOUT
8
11 ENABLE
0VOUT 13
16 ENABLE
VO
9
10 DNC
PIN DEFINITION (DIP)
PIN DEFINITION (SO)
PIN #
PIN NAME
PIN #
PIN NAME
1
VS
Voltage Input
1
VS
2
NC
No Connection
2
VS
Voltage Input
7
VREC
Rectified Output
3
NC
No Connection
8
0VOUT
Output Ground
12
VREC
Rectified Output
9
VO
Voltage Output
13
VOUT
Output Ground
10
DNC
Do Not Connect
14
VO
Voltage Output
11
ENABLE
Output Voltage Enable
15
DNC
Do Not Connect
12
ERROR
17
0VIN
18
SYNC
DCR01 Series
SBVS013C
DESCRIPTION
15 DNC
VO 14
Error Flag Active Low
16
ENABLE
Input Ground
17
ERROR
Synchronization Input
26
0VIN
27
0VIN
28
SYNC
DESCRIPTION
Voltage Input
Output Voltage Enable
Error Flag Active Low
Input Ground
Input Ground
Synchronization Input
5
TYPICAL CHARACTERISTICS
At TA = +25°C, VS = 5V, IO = 10mA, CFILTER = 1µF, CO = 0.1µF, unless otherwise specified.
DCR0105 OUTPUT NOISE
(100MHz Bandwidth)
18
80
16
70
14
60
12
Noise (mVp-p)
Ripple Voltage (mVp-p)
OUTPUT VOLTAGE RIPPLE
(all “U”, all 5V Output “P” Devices, and DCR010503P)
10
8
6
40
30
20
4
10
2
0
0
0
20
40
60
80
0
100
20
40
60
80
Load (%)
Load (%)
DCR011203P AND DCR012403P
OUTPUT VOLTAGE RIPPLE
3V OUTPUT EFFICIENCY
(5V and 12V Input Devices)
30.0
70
25.0
60
100
85°C
50
20.0
Efficiency (%)
Ripple Voltage (mVp-p)
50
15.0
10.0
–40°C
40
25°C
30
20
5.0
10
0
0
0
20
40
60
80
100
0
10
20
30
40
50
60
70
Load (%)
Load (%)
DCR012403P AND U OUTPUT EFFICIENCY
5V OUTPUT EFFICIENCY
(5V and 12V Input Devices.
80
90
100
80
90
100
80
60
+85°C
70
50
+25°C
40
Effeciency (%)
Efficiency (%)
60
30
20
50
40
–40°C
30
20
10
10
0
0
0
10
20
30
40
50
Load%
6
60
70
80
90
100
0
10
20
30
40
50
60
70
Load (%)
DCR01 Series
SBVS013C
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VS = 5V, IO = 10mA, CFILTER = 1µF, CO = 0.1µF, unless otherwise specified.
EFFICIENCY vs LOAD
DCR0112405 “P” and “U” DEVICES
70
70
60
60
50
50
Efficiency (%)
Efficiency (%)
EFFICIENCY FOR 5V AND 12V INPUT
“U” DEVICES, 5V OUTPUT
40
30
30
20
20
10
10
0
0
0
10
20
30
40
50
60
70
80
90
100
0
10
20
30
40
50
60
70
80
Load (%)
Load (%)
DCR011203P OUTPUT NOISE
(100MHz Bandwidth)
DCR011205P OUTPUT NOISE
(100MHz Bandwidth)
120.0
60.0
100.0
50.0
80.0
40.0
Noise (mVp-p)
Noise (mVp-p)
40
60.0
40.0
90
100
30.0
20.0
10.0
20.0
0
0
0
20
40
60
80
40%
20%
0%
100
80%
60%
Load (%)
Load%
DCR010503P VOUT vs LOAD
3V OUTPUT vs LOAD
(all devices except DCR010503P)
3.305
100%
3.325
85°C
3.3
3.325
3.305
3.29
VOUT (V)
VOUT (V)
3.295
3.285
25°C
3.28
3.295
3.285
3.275
3.275
3.27
–40°C
3.265
3.265
0
10
20
30
40
50
Load (%)
DCR01 Series
SBVS013C
60
70
80
90
100
0
10
20
30
40
50
60
70
80
90
100
Load (%)
7
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VS = 5V, IO = 10mA, CFILTER = 1µF, CO = 0.1µF, unless otherwise specified.
DCR0105 SERIES INPUT CURRENT
REFLECTED NOISE (100MHz Bandwidth)
LOAD vs VOUT
(for all 5V Output Devices)
5.04
5.02
40mA/div
VOUT (V)
5.00
4.98
4.96
4.94
4.94
0
10
20
30
40
50
60
70
80
90
100
500ns/div
Load (%)
DCR01 SERIES INPUT
CURRENT REFLECTED RIPPLE
30mA Changing
to 325mA
20mA/div
200mV/div
500ns/div
10µs/div
DCR010503P LOAD TRANSIENT RESPONSE
DCR010503P OUTPUT VOLTAGE NOISE
AT 100% LOAD (100MHz Bandwidth)
Load Current
Load Current
20mV/div
200mV/div
150mA Changing
to 300mA
Load Current
Output Voltage
Output Voltage
10µs/div
8
DCR010503P LOAD TRANSIENT RESPONSE
Output Voltage
200ns/div
DCR01 Series
SBVS013C
TYPICAL CHARACTERISTICS (Cont.)
At TA = +25°C, VS = 5V, IO = 10mA, CFILTER = 1µF, CO = 0.1µF, unless otherwise specified.
DCR010503P OUTPUT VOLTAGE RIPPLE
AT 100% LOAD (20MHz Bandwidth)
200mV/div
5mV/div
20mA Changing
to 200mA
DCR010505P LOAD TRANSIENT RESPONSE
Load Current
Output Voltage
200ns/div
10µs/div
DCR010505P LOAD TRANSIENT RESPONSE
DCR010505P OUTPUT VOLTAGE NOISE
AT 100% LOAD (100MHz Bandwidth)
200mV/div
20mV/div
100mA Changing
to 200mA
Load Current
Output Voltage
10µs/div
200ns/div
5mV/div
DCR010505P OUTPUT VOLTAGE RIPPLE
AT 100% LOAD (20MHz Bandwidth)
200ns/div
DCR01 Series
SBVS013C
9
FUNCTIONAL DESCRIPTION
If devices are synchronized, it should be noted that all devices
will draw maximum current simultaneously at start up. This
can cause the input voltage to dip. Should it fall below the
minimum input voltage, the devices may not start up. A 2.2µF
capacitor (low ESR) should be connected as close to the
device input pins as possible for the 5V input devices, and a
0.47µF capacitor for the 12V and 24V devices.
If more than eight devices are required to be synchronized, it
is recommended that external synchronization be used. Details
are contained in Texas Instruments Application Report
literature number SBAA035 (AB-153) available at www.ti.com.
OVERVIEW
The DCR01 series offers isolation from an unregulated
power supply operating from a choice of input voltages. The
DCR01s provide a variety of regulated output voltages at a
nominal output power of 1W or above.
POWER STAGE
The input supply is chopped at a frequency of 400kHz
(internal oscillator divided by 2), which is used to drive the
center-tapped toroidal transformer.
CONSTRUCTION
The DCR01 is manufactured using the same technology as
standard IC packages. There is no substrate within the
package. The DCR01 is constructed using a driver IC, lowdropout voltage regulator, rectifier diodes, and a wound
magnetic toroid, all mounted on a leadframe. The DCR01
requires no special PCB assembly processing, as there is no
solder within the package. The result is an isolated DC/DC
converter with inherently high reliability.
RECTIFICATION
The transformer’s output is full wave rectified and smoothed
by the external capacitor connected to VREC.
REGULATOR
The internal low drop-out regulator provides a well-regulated output voltage, throughout the operating range of the
device.
ADDITIONAL FUNCTIONS
OSCILLATOR AND WATCHDOG
The DCR01 uses an internal saw-tooth generator to provide
the 800kHz on-board oscillator that is used to drive the
power switching circuit. The operation of the oscillator is
monitored by the watchdog, which will tri-state the output
driver circuit if the oscillator fails, or if the SYNC pin is
taken LOW, (shutdown mode). When the SYNC pin is
returned HIGH, normal operation resumes.
DISABLE/ENABLE
The DCR01 can be disabled or enabled by driving the SYNC
pin using an open drain CMOS gate. If the SYNC pin is
pulled LOW, the DCR01 will be disabled. The disable time
depends upon the external loading. The internal disable
function is implemented in 2µs. Removal of the pull down
will enable the DCR01.
Capacitance loading on the SYNC pin should be minimized
in order to prevent a reduction in the internal oscillator‘s
frequency. See Application Report (SBAA035) “External
Synchronization of the DCP01/02 Series of DC/DC Converters”. This document contains information on how to null
the effects of additional capacitance on the SYNC pin. The
oscillator’s frequency can be measured at VREC, as this is the
fundamental frequency of the ripple component.
SYNCHRONIZATION
If more than one DCR01 is being used, beat frequencies and
other electrical interference can be generated. This is due to
the small variations in switching frequencies between the
converters.
The DCR01 overcomes this by allowing devices to be
synchronized to one another. Up to eight devices can be
synchronized by connecting the SYNC pins together, with
care being taken to minimize the capacitance of tracking.
Significant stray capacitance on the SYNC pin will have the
effect of reducing the frequency of the internal oscillator. If
this is large, the DCR01 may be taken outside its optimized
operating parameters, and saturation of the magnetics may
result, damaging the device.
OUTPUT ENABLE/DISABLE
The regulated output of the DCR01 can be disabled by pulling
the ENABLE pin LOW (connect ENABLE to 0VOUT). Holding the ENABLE pin HIGH (connect ENABLE to VREC)
enables the regulated output voltage, thus allowing the output
to be controlled from the isolated side, see Figure 1.
U1
VIN
VS
VO1
VOUT
RERR = 10kΩ
CIN
DCR
SYNC
0V
01
ERROR
VREC
ERROR
REN = 10kΩ
ENABLE
0V
SW1
see text
CFILTER = 1µF
COUT = 0.1µF
0VOUT
NOTE: (1) 2.2µF capacitor with low ESR for 5V
devices and 0.47µF for 12V and 24V devices.
FIGURE 1. DCR01 with a Single Output.
10
DCR01 Series
SBVS013C
APPLICATION NOTES
ERROR FLAG
The DCR01 has an ERROR pin which provides a “power
good” flag, as long as the internal regulator is in regulation.
DCR01 SINGLE VOLTAGE OUTPUT
The DCR01 can be used to provide a single voltage output
by connecting, see Figure 1. The ERROR output signal will
be pulled up to the value of VOUT for the particular DCR01
being used. The value of RERR will depend on the loading on
the ERROR line however, the total load on the ERROR line
must not exceed the value given in the specification.
The output may be permanently enabled by connecting the
ENABLE pin to the VREC pin. The DCR01 may be enabled
remotely by connecting the ENABLE pin to VREC via a pullup resistor (REN ), the value of this resistor is not critical for
the DCR01 as only a small current flows. The switch SW1 can
be used to pull the ENABLE pin LOW, thus disabling the
output. The switching devices can be a bipolar transistor, FET
or a mechanical device, the main load that it will see is REN.
DECOUPLING
Ripple Reduction
Due to the very low forward resistance of the DMOS
switching transistors, high current demands are placed upon
the input supply for a short time. By using a good quality
low Equivalent Series Resistance (ESR) capacitor of 2.2µF
(minimum) for the 5V input devices and a 0.47µF capacitor
for the 12V and 24V devices, placed close to the IC supply
input pins, the effects on the power supply can be minimized.
The high switching frequency of 400kHz allows relatively
small values of capacitors to be used for filtering the rectified output voltage. A good quality low ESR capacitor of
1µF placed close to the VREC pin and output ground will
reduce the ripple.
It is not recommended that the DCR01 be fitted using an
IC socket as this will degrade performance.
The output at VREC is full wave rectified and produces a
ripple of 800kHz.
It is recommended that a 0.1µF low ESR capacitor is
connected close to the output pin and ground to reduce noise
on the output. The capacitor values listed are minimum
values. If lower ripple is required then the filter capacitor
should be increased in value to 2.2µF.
NOTE: As with all switching power supplies the best
performance is only obtained with low ESR capacitors
connected close to the switcher. If low ESR capacitors are
not used, the ESR will generate a voltage drop when the
capacitor is supplying the load power. Often a larger capacitor is chosen for this purpose when a low ESR smaller
capacitance would perform as well.
GENERATING TWO POSITIVE
OUTPUT VOLTAGES
Two DCR01s can be used to create output voltages of +3.3V
and +5V, as shown in Figure 2. The two DCR01s are
connected in self-synchronization, thus locking the oscillators of both devices to a single frequency.
The ERROR and ENABLE facilities may be used in a
similar configuration for a single DCR01. The filter capacitors connected to the VREC pins (CFILTER), should be kept
separate from each other and connected in close proximity to
their respective DCR01. If similar output voltages are being
used, it is not recommended that a single filter capacitor
(with an increased capacitance) be used with both VREC pins
connected together, as this could result is the overloading of
one of the devices.
U1
VIN
VS
VO1
VOUT
RERR = 10kΩ
ERROR
CIN(1)
DCR
01
ERROR
VREC
COUT = 0.1µF
ENABLE
SYNC
0V
0V
CFILTER = 1µF
0VOUT
U2
VIN
VS
VO2
VOUT
RERR = 10kΩ
ERROR
CIN(1)
DCR
01
SYNC
0V
ERROR
VREC
COUT = 0.1µF
ENABLE
0V
CFILTER = 1µF
NOTE: (1) 2.2µF capacitor with low ESR for 5V
devices and 0.47µF for 12V and 24V devices.
FIGURE 2. Generating Two Positive Voltages from Self-Synchronized DCR01s.
DCR01 Series
SBVS013C
11
If the SYNC pin is being used, the tracking between device
SYNC pins should be short to avoid stray capacitance. If the
SYNC pin is not being used it is advisable to place a guard
ring (connected to input ground) around this pin to avoid any
noise pick up.
The output should be taken from the device using ground
and power planes. This will ensure minimum losses.
A good quality low ESR capacitor placed as close as
practicable across the input will reduce reflected ripple and
ensure a smooth start up.
A good quality low ESR capacitor placed as close as
practicable across the rectifier output terminal and output
ground will give the best ripple and noise performance.
GENERATION OF DUAL POLARITY VOLTAGES
FROM TWO SELF-SYNCHRONIZED DCR01s
Two DCR01s can be configured to produce a dual polarity
supply (i.e., ±5V); the circuit must be connected as shown in
Figure 3.
It must be observed that both devices are producing a
positive regulated output, therefore the ERROR, ENABLE,
and VREC are all relative to that particular devices 0V and
must not be directly connected together, or in the case of the
negative output device connected to the common 0V output.
PCB LAYOUT
RIPPLE AND NOISE
Careful consideration should be given to the layout of the
PCB in order for the best results to be obtained.
The DCR01 is a switching power supply and as such can
place high peak current demands on the input supply. In
order to avoid the supply falling momentarily during the fast
switching pulses, ground and power planes should be used
to track the power to the input of DCR01 (this will also serve
to reduce noise on the circuit). If this is not possible, the
supplies must be connected in a star formation, with the
tracks made as wide as possible.
THERMAL MANAGEMENT
Due to the high power density of this device, it is advisable
to provide a ground plane on the output. The output regulator is mounted on a copper leadframe, and a ground plane
will serve as an efficient heatsink.
U1
VIN
VS
VPOS O/P
VOUT
ERROR
DCR
CIN(1)
01
VREC
COUT = 0.1µF
ENABLE
SYNC
0V
0V
CFILTER = 1µF
0V
U2
VIN
VS
VOUT
ERROR
DCR
CIN(1)
01
SYNC
0V
VREC
COUT = 0.1µF
ENABLE
VNEG O/P
0V
CFILTER = 1µF
NOTE: (1) 2.2µF capacitor with low ESR for 5V
devices and 0.47µF for 12V and 24V devices.
FIGURE 3. Dual Polarity Voltage Generation from Two Self-Synchronized DCR01’s.
12
DCR01 Series
SBVS013C
PACKAGE DRAWINGS
MPDI055 – APRIL 2001
NVE (R-PDIP-T10/18)
PLASTIC DUAL-IN-LINE
0.920 (23,37)
0.880 (22,35)
D
18
10
0.280 (7,11)
0.240 (6,10)
D
1
9
Index
Area
E
0.070 (1,78)
0.045 (1,14)
0.195 (4,95)
0.115 (2,92)
Base
Plane
–C–
Seating
Plane
0.325 (8,26)
0.300 (7,62)
0.210 (5,33)
MAX
E
0.005 (0,13)
MIN 4 PL
Full Lead D
0.100 (2,54)
0.022 (0,56)
0.014 (0,36)
0.010 (0,25) M C
0.150 (3,81)
0.115 (2,92)
0.300 (7,63)
0.014 (0,36)
0.008 (0,20)
0.015 (0,38)
MIN
0.060 (1,52)
0.000 (0,00)
0.430 (10,92)
MAX
F
F
4202497/A 03/01
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001-AC with the exception
of lead count.
D. Dimensions do not include mold flash or protrusions.
Mold flash or protrusions shall not exceed 0.010 (0,25).
E. Dimensions measured with the leads constrained to be
perpendicular to Datum C.
F. Dimensions are measured at the lead tips with the
leads unconstrained.
G. A visual index feature must be located within the
cross-hatched area.
DCR01 Series
SBVS013C
13
PACKAGE DRAWINGS (Cont.)
MPDS106 – AUGUST 2001
DVB(R-PDSO-G12/28)
PLASTIC SMALL-OUTLINE
C
A
18,10
17,70
11,20
10,82
28
0,25 M B M
15
B
7,60
7,40
10,65
10,01
D
Index
Area
1
1
4
2,65
2,35
C
0,75
0,25 x 45°
Seating
Plane
1,27
G
0,51
0,33
0,30
0,10
0,10
0,32
0,23
0,25 M C A M B S
0°–8°
F
1,27
0,40
4202104/A 08/01
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C.
Body length dimension does not include mold
flash, protrusions, or gate burrs. Mold flash, protrusions,
and gate burrs shall not exceed 0,15 mm per side.
D. Body width dimension does not include inter-lead flash
or portrusions. Inter-lead flash and protrusions
shall not exceed 0,25 mm per side.
E. The chamfer on the body is optional. If it is not present,
a visual index feature must be located within the
cross-hatched area.
G. Lead width, as measured 0,36 mm or greater
above the seating plane, shall not exceed a
maximum value of 0,61 mm.
H. Lead-to-lead coplanarity shall be less than
0,10 mm from seating plane.
I. Falls within JEDEC MS-013-AE with the exception
of the number of leads.
F. Lead dimension is the length of terminal for soldering
to a substrate.
14
DCR01 Series
SBVS013C
PACKAGE OPTION ADDENDUM
www.ti.com
3-Oct-2003
PACKAGING INFORMATION
ORDERABLE DEVICE
STATUS(1)
PACKAGE TYPE
PACKAGE DRAWING
PINS
PACKAGE QTY
DCR010503P
ACTIVE
PDIP
NVE
10
20
DCR010503U
ACTIVE
SOP
DVB
12
28
DCR010503U/1K
ACTIVE
SOP
DVB
12
1000
DCR010505P
ACTIVE
PDIP
NVE
10
20
DCR010505U
ACTIVE
SOP
DVB
12
28
DCR010505U/1K
ACTIVE
SOP
DVB
12
1000
DCR011203P
ACTIVE
PDIP
NVE
10
20
DCR011203U
ACTIVE
SOP
DVB
12
28
DCR011203U/1K
ACTIVE
SOP
DVB
12
1000
DCR011205P
ACTIVE
PDIP
NVE
10
20
DCR011205U
ACTIVE
SOP
DVB
12
28
DCR011205U/1K
ACTIVE
SOP
DVB
12
1000
DCR012403P
ACTIVE
PDIP
NVE
10
20
DCR012403U
ACTIVE
SOP
DVB
12
28
DCR012403U/1K
ACTIVE
SOP
DVB
12
1000
DCR012405P
ACTIVE
PDIP
NVE
10
20
DCR012405U
ACTIVE
SOP
DVB
12
28
DCR012405U/1K
ACTIVE
SOP
DVB
12
1000
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
MECHANICAL DATA
MPDI055 – APRIL 2001
NVE (R-PDIP-T10/18)
PLASTIC DUAL-IN-LINE
0.920 (23,37)
0.880 (22,35)
D
18
10
0.280 (7,11)
0.240 (6,10)
D
1
9
Index
Area
E
0.070 (1,78)
0.045 (1,14)
0.195 (4,95)
0.115 (2,92)
Base
Plane
–C–
Seating
Plane
0.325 (8,26)
0.300 (7,62)
0.210 (5,33)
MAX
E
0.005 (0,13)
MIN 4 PL
Full Lead D
0.100 (2,54)
0.022 (0,56)
0.014 (0,36)
0.010 (0,25) M C
0.150 (3,81)
0.115 (2,92)
0.300 (7,63)
0.014 (0,36)
0.008 (0,20)
0.015 (0,38)
MIN
0.060 (1,52)
0.000 (0,00)
0.430 (10,92)
MAX
F
F
4202497/A 03/01
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001-AC with the exception
of lead count.
D. Dimensions do not include mold flash or protrusions.
Mold flash or protrusions shall not exceed 0.010 (0,25).
E. Dimensions measured with the leads constrained to be
perpendicular to Datum C.
F. Dimensions are measured at the lead tips with the
leads unconstrained.
G. A visual index feature must be located within the
cross-hatched area.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
MECHANICAL DATA
MPDS106A – AUGUST 2001 – REVISED NOVEMBER 2001
DVB(R-PDSO-G12/28)
–A–
28
PLASTIC SMALL-OUTLINE
18,10
17,70
11,20
10,82
C
0°–8°
15
1,27
0,40
F
7,60
7,40
–B–
D
10,65
10,01
0,25 M B M
Index
Area
1
14
0,30
0,10
2,65
2,35
0,75
0,25 x 45°
Base
Plane
–C–
Seating
Plane
1,27
G
0,32
0,23
0,51
0,33
0,10
0,25 M C A M B S
4202104/B 11/01
G. Lead width, as measured 0,36 mm or greater
above the seating plane, shall not exceed a
maximum value of 0,61 mm.
H. Lead-to-lead coplanarity shall be less than
0,10 mm from seating plane.
I. Falls within JEDEC MS-013-AE with the exception
of the number of leads.
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C.
Body length dimension does not include mold
flash, protrusions, or gate burrs. Mold flash, protrusions,
and gate burrs shall not exceed 0,15 mm per side.
D. Body width dimension does not include inter-lead flash
or portrusions. Inter-lead flash and protrusions
shall not exceed 0,25 mm per side.
E. The chamfer on the body is optional. If it is not present,
a visual index feature must be located within the
cross-hatched area.
F. Lead dimension is the length of terminal for soldering
to a substrate.
•
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251–1443
•
1
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