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DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
features
* high efficiency topology, typically 94% at
3.3 Vdc
* industry standard footprint
* wide ambient temperature range, -40C to
+85C
* cost efficient open frame design
* programmable output voltage via external
resistor from 0.75 to 3.63 Vdc
* no minimum load requirement (stable at all
loads)
* remote on/off
* remote sense compensation
* fixed switching frequency
* continuous short-circuit protection and over
current protection
* over-temperature protection (OTP)
* monotonic startup with pre-bias at the output.
* UL/IEC/EN60950-1 (E222736) certified.
1. INTRODUCTION
2. VPOL5A-5-SMTCONVERTER FEATURES
6. SAFETY
6.1 Input Fusing and Safety Considerations.
3. GENERAL DESCRIPTION
3.1 Electrical Description
7. APPLICATIONS
7.1 Layout Design Challenges.
3.2 Thermal Packaging and Physical Design.
7.2 Convection Requirements for Cooling
4. TECHNICAL SPECIFICATIONS
7.3 Thermal Considerations
5. MAIN FEATURES AND FUNCTIONS
5.1 Operating Temperature Range
7.4 Power De-Rating Curves
5.2 Over-Temperature Protection (OTP)
7.6 Input Capacitance at the Power Module
5.3 Output Voltage Adjustment
7.7 Test Set-Up
5.4 Safe Operating Area (SOA)
7.8 VPOL5A-5-SMT Series Output Voltage Adustment.
5.5 Over Current Protection
7.9 Output Ripple and Noise Measurement
5.6 Remote On/Off
7.10 Output Capacitance
5.7 UVLO (Under-Voltage Lockout)
7.11 SMT Reflow Profile
7.5 Efficiency vs Load Curves
8. MECHANICAL OUTLINE DIAGRAMS
8.1 SIP/SMT05 Mechanical Outline Diagrams
8.2 SMT Tape and Reel Dimensions
20050 SW 112th Ave. Tualatin, Oregon
97062 phone 503.612.2300 fax 503.612.2383
w
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rev.
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DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
L1
Q1
+VIN
1. Introduction
+VO
Q2
C1
This application note describes the features and functions of CUI INC’s
D1
C2
VPOL5A-5-SMT series of Non Isolated DC-DC Converters. These are
highly efficient, reliable and compact, high power density, single output
dc-dc converters. These “Point of Load” modules serve the needs
COM
COM
specifically of the fixed and mobile telecommunications and computing
R1
market, employing economical distributed Power Architectures. The
VPOL5A-5-SMT series provide precisely regulated output voltage range
PWM IC
ON/OFF
R trim
ERR AMP
from 0.75V to 3.63 Vdc over a wide range of input voltage (Vi=3.0 – 5.5
Vdc) and can operate over an ambient temperature range of –40
+85
TRIM
R2
to
. Ultra-high efficiency operation is achieved through the use of
Figure 1. Electrical Block Diagram
synchronous rectification and drive control techniques.
The modules are fully protected against short circuit and overtemperature conditions. CUI INC’s world class automated
3.2 Thermal Packaging and Physical Design.
manufacturing methods, together with an extensive testing and
The VPOL5A-5-SMT series uses a multi-layer FR4 PCB construction.
qualification program, ensure that all VPOL5A-5-SMT series converters
All surface mount power components are placed on one side of the
are extremely reliable.
PCB, and all low-power control components are placed on the other
2. VPOL5A-5-SMTConverter Features
ensuring that control components are not thermally stressed. The
High efficiency topology, typically 94% at 3.3 Vdc
side. Thus, the Heat dissipation of the power components is optimized,
converter is an open-frame product and has no case or case pin. The
open-frame design has several advantages over encapsulated closed
Industry standard footprint
Wide ambient temperature range, -40 °C to +85 °C
devices. Among these advantages are:
Cost efficient open frame design
Efficient Thermal Management: the heat is removed from the
Programmable output voltage via external resistor from 0.75 to
heat generating components without heating more sensitive, small
3.63 Vdc
signal control components.
No minimum load requirement (Stable at all loads)
Environmental: Lead free open-frame converters are more easily
Remote ON/OFF
re-cycled.
Remote sense compensation
Cost Efficient: No encapsulation. Cost efficient open-frame
Fixed switching frequency
construction.
Continuous short-circuit protection and over current protection
Reliable: Efficient cooling provided by open frame construction
Over-temperature protection (OTP)
offers high reliability and easy diagnostics.
Monotonic Startup with pre-bias at the output.
UL/IEC/EN60950 Certified.
3. General Description
3.1 Electrical Description
A block diagram of the VPOL5A-5-SMT Series converter is shown in
Figure 1. Extremely high efficiency power conversion is achieved
through the use of synchronous rectification and drive techniques.
Essentially, the powerful VPOL5A-5-SMT series topology is based on a
non-isolated synchronous buck converter. The control loop is optimized
for unconditional stability, fast transient response and a very tight line
and load regulation. In a typical pre-bias application the VPOL5A-5SMT series converters do not draw any reverse current at start-up. The
output voltage can be adjusted from 0.75 to 3.63vdc, using the TRIM
pin with a external resistor. The converter can be shut down via a
remote on/off input that is referenced to ground. This input is
compatible with popular logic devices; a 'positive' logic input is supplied
as standard. Positive logic implies that the converter is enabled if the
remote on/off input is high (or floating), and disabled if it is low.
The converter is also protected against over-temperature conditions. If
the converter is overloaded or the ambient temperature gets too high,
the converter will shut down to protect the unit.
20050 SW 112th Ave. Tualatin, Oregon
97062 phone 503.612.2300 fax 503.612.2383
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rev.
page
3 of 11
date
09/2010
DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
4. Technical Specifications
(All specifications are typical at nominal input, full load at 25
PARAMETER
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Operating Temp erature
See Thermal Considerations Section
unless otherwise noted.)
NOTES and CONDITIONS
Operating Input Voltage
Input Under-Voltage Lockout
Turn -On Voltag e Threshold
Turn -Off Voltag e Threshold
Lockout Hysteresis Voltage
Min.
Typical Max.
ALL
0
5.8
ALL
-40
+85
ALL
-55
+125
ALL
3.0
Storage Temperature
INPUT CHARACTERISTICS
Device
Vo,set
Vin-0.5 Vdc
5
5.5
2.0
1.9
0.1
ALL
ALL
ALL
ALL
Units
Vdc
Vdc
Vdc
Vdc
Vdc
5
A
Maximum Input Current
Vin=0 to 5.5 Vdc , Io=Io,max.
No-Load Input Current
Vo=0.75V
Vo=1.2V
Vo=1.5V
Vo=1.8V
Vo=2.0V
Vo=2.5V
Vo=3.3V
ALL
Off Converter Input Current
Shutdown input idle current
ALL
10
mA
ALL
0.1
As
2
Inrush Current (I t)
Input Reflected-Ripple Current
25
30
30
35
35
35
35
mA
2
P-P thru 1uH inductor, 5Hz to 20MHz
ALL
150
mA
Output Voltage Set Point
Vin=Nominal Vin , Io=Io.max, Tc=25
ALL
-1.5% Vo,set +1.5%
Vdc
Output Voltage Trim Adjustment Range
Selected by an extern al resistor
ALL
OUTPUT CHARACTERISTIC
0.75
3.63
Vdc
Output Voltage Regulation
Load Regulation
Io=Io.min to Io.max
ALL
-0.5
+0.5
%
Line Regulation
Vin=low line to high line
ALL
-0.4
+0.4
%
Tempera ture Coefficient
Ta=-40
ALL
-0.03
+0.03
Output Voltage Ripple and Noise
5Hz to 20MHz bandwidth
to 85
%/
Peak-to-Peak
Full Load, 1uF ceramic and 10uF tantalum
ALL
50
mV
RMS
F u l l L oa d , 1 u F c e r a m i c a n d 1 0 u F t a n t a l u m
ALL
20
mV
Lo w ESR
ALL
3000
uF
ALL
0
Output DC Current-Limit Inception
Output Voltage =90% Nominal Output Voltage
ALL
6
Shout Circuit Protection
Continuous with Hiccup Mode
External Capacitive Load
Operating Output Current Range
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383
9.5
5
A
15
A
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DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
PARAMETER
DYNAMIC CHARACTERISTICS
page
NOTES and CONDITIONS
Device
Min.
Typical Max.
Units
Output Voltage Transient Response
Error Brand
50% Step Load Change, di/dt=0.1A/us
ALL
200
mV
Setting Time (within 1% Vout nominal)
50% Step Load Change, di/dt=0.1A/us
ALL
200
us
EFFICIENCY
100% Load
Vo=0.75V
Vo=1.2V
Vo=1.5V
Vo=1.8V
Vo=2.0V
Vo=2.5V
Vo=3.3V
ALL
Non-isolation
ALL
79
85
87
89
90
92
94
%
ISOLATION CHARACTERISTICS
Input to Output
0
Vdc
FEATURE CHARACTERISTICS
Switching Frequency
On/Off Control, Positive Logic Remote On/Off
Logic Low (Module Off)
Logic High (Module On)
On/Off Control, Negative Logic Remote On/Off
Logic Low (Module On)
Logic High (Module Off)
On/Off Current (for both remote on/off logic)
Leakage Current (for both remote on/off logic)
Turn -On Delay and Rise Time
Turn -On Delay Time, From On/Off Control
Turn -On Delay Time, From I nput
Output Voltage Rise Time
Over Temperature Protection
ALL
300
Standard Model
0
KHz
0.4
Vdc
Vdc
0.4
Vin
Vdc
Vdc
1
1
mA
mA
Vin
or Open Circuit
or Open Circuit
Suffix “N” Model
0
2.8
Ion/off at Von/off =0.0V
Logic High, Von/off=14V
ALL
AL L
Von/off to 10 %Vo,set
Vin,min. to 10%V o,set
10%Vo,set to 90 %Vo,set
AL L
ALL
ALL
ALL
2
2
4.5
120
ms
ms
ms
ALL
1.5
M hours
ALL
2.3
grams
GENERAL SPECIFICATIONS
MTBF
Weight
Dimensions
SIP packages
SMT packages
20050 SW 112th Ave. Tualatin, Oregon
Io=100%of Io.max;Ta=25
217F
per MIL-HDBK-
0.9x0.4x0.22 inc hes (22.9x10.16x5.6 mm)
0.8x0.45x0.24 inches(20.3x11. 43x6.09 mm)
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DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
5. Main Features and Functions
5.1 Operating Temperature Range
CUI INC’s VPOL5A-5-SMT series converters highly efficient converter
design has resulted in its ability to operate over a wide ambient
temperature environment ( -40
page
to 85 ). Due consideration must be
5.4 Safe Operating Area (SOA)
Figure 2 provides a graphical representation of the Safe Operating Area
(SOA) of the converter. This representation assumes ambient operating
conditions such as airflow are met as per thermal guidelines provided in
Sections 7.2 and 7.3.
given to the de-rating curves when ascertaining maximum power that can
Vo
be drawn from the converter. The maximum power drawn is influenced
by a number of factors, such as:
Input voltage range.
Vo,nom
Air velocity (forced or natural convection).
Mounting orientation of converter PCB with respect to the Airflow.
Motherboard PCB design, especially ground and power planes.
These can be effective heat sinks for the converter.
5.2 Over-Temperature Protection (OTP)
VOLTAGE (V)
Output load current.
Safe Operating Area
The VPOL5A-5-SMT Series converters are equipped with non-latching
over-temperature protection. A te mperature sensor monitors the
Io,max Io,CL Io
temperature of the hot spot (typically, top switch). If the temperature
CURRENT (A)
exceeds a threshold of 120 C (typical) the converter will shut down,
disabling the output. When the temperature has decreased the converter
Figure 2. Maximum Output Current Safe Operating Area
will automatically restart.
The over-temperature condition can be induced by a variety of reasons
such as external overload condition or a system fan failure.
5.3 Output Voltage Adjustment
5.5 Over Current Protection
All different voltage models have a full continuous short-circuit protection.
The unit will auto recover once the short circuit is removed. To provide
Section 7.8 describes in detail as to how to trim the output voltage with
protection in a fault condition, the unit is equipped with internal over-
respect to its set point. The output voltage on all models is trimmable in
current protection. The unit operates normally once the fault condition is
the range 0.75 – 3.63 Vdc.
removed. The power module will supply up to 150% of rated current. In
the event of an over current converter will go into a hiccup mode
protection.
5.6 Remote On/Off
The remote on/off input feature of the converter allows external circuitry
to turn the converter ON or OFF. Active-high remote on/off is available
as standard. The VPOL5A-5-SMT series converters are turned on if the
remote on/off pin is high, or left open or floating. Setting the pin low will
turn the converter ‘Off’. The signal level of the remote on/off input is
defined with respect to ground. If not using the remote on/off pin, leave
the pin open (module will be on). The part number suffix “N” is Negative
remote on/off version. The unit is guaranteed OFF over the full
temperature range if this voltage level exceeds 2.8 Vdc. The converters
are turned on If the on/off pin input is low or left open. The recommended
SMTremote on/off drive circuit as shown as figure 3, 4.
20050 SW 112th Ave. Tualatin, Oregon
97062 phone 503.612.2300 fax 503.612.2383
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rev.
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6 of 11
date
09/2010
DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
proper low impedance tracks between power module, input and output
+Vin
ON/OFF
Control
+Vo
grounds. The recommended SMT footprint as shown as figure 5.
Recommended Pad Layout
Remote ON/OFF
Dimensions are in Inches ( millimetes )
Q1
VPOL5A-5-SMT
Common
0.180
(4.57)
0.160
(4.06)
0.160
(4.06)
0.190
(4.83)
Common
VOUT
TRIM
GND
0.340
(8.64)
0.350
(8.89)
Figure 3. Positive Remote On/Off Input Drive Circuit
+Vo
+Vin
Q1
VPOL5A-5-SMT
ON/OFF
Control
Remote ON/OFF
Common
ON/OFF
0.06
(1.5)
0.05
(1.3)
0.010
(0.25)
VIN
0.690
(17.53)
PAD SIZE
MIN : 0.120" x 0.095 "
MAX : 0.135" x 0.110 "
Figure 5. Recommended SMT Footprint (Top View)
Common
Figure 4. Negative Remote On/Off Input Drive Circuit
5.7 UVLO (Under-Voltage Lockout)
The voltage on the Vcc pin determines the start of the operation of the
Converter. When the input Vcc rises and exceeds about 2.0V the
converter initiates a soft start. The UVLO function in the converter has a
hysteresis (about 100mV) built in to provide noise immunity at start-up.
6. Safety
6.1 Input Fusing and Safety Considerations.
Agency Approvals: The power Supply shall be submitted to and receive
formal approval from the following test agencies.
1.The power supply shall be approved by a nationally recognized testing
rd
laboratory to UL/CSA 60950 3 Edition (North America) and EN60950
(International)
2. CB Certificate from an internationally recognized test house in
accordance with EN 60950.
The VPOL5A-5-SMT series converters do not have an internal fuse.
However, to achieve maximum safety and system protection, always
use an input line fuse. The safety agencies require a time-delay fuse
with a maximum rating of 10A.
7. Applications
7.1 Layout Design Challenges.
In optimizing thermal design the PCB is utilized as a heat sink. Also
some heat is transferred from the SMT module to the main board through
connecting pins. The system designer or the end user must ensure that
other components and metal in the vicinity of the
VPOL5A-5-SMT series meet the spacing requirements to which the
system is approved.
Low resistance and low inductance PCB layout traces are the norm and
should be used where possible. Due consideration must also be given to
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rev.
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7 of 11
date
09/2010
DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
TYPICAL POWER DERATING FOR 5Vin 3.3Vout
6.0
5.0
Output Current(A)
4.0
0LFM
3.0
100LFM
2.0
200LFM
1.0
0.0
0
10
20
30
40
50
60
70
80
90
100
o
Ambient Temperature( C)
Figure 3. Typical Power De-rating for 5V IN 3.3Vout
NOTE:
1. specific input & output derating curves available, please
contact CUI INC for details
20050 SW 112th Ave. Tualatin, Oregon
97062 phone 503.612.2300 fax 503.612.2383
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rev.
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date
09/2010
DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
7.5 Efficiency vs Load Curves
VPOL5A-5-SMT Vo=2.5V (Eff Vs Io)
VPOL5A-5-SMT Vo=3.3V (Eff Vs Io)
95%
95%
Efficincy (%)
100%
Efficincy (%)
100%
90%
85%
4.5V
5.0V
5.5V
80%
75%
90%
85%
3.0V
5.0V
5.5V
80%
75%
70%
70%
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0
0.5
1
Current Load (A)
VPOL5A-5-SMT Vo=1.8V (Eff Vs Io)
95%
Efficincy (%)
95%
Efficincy (%)
2.5
3
3.5
4
4.5
5
VPOL5A-5-SMT Vo=1.5V (Eff Vs Io)
100%
90%
85%
3.0V
5.0V
5.5V
75%
2
Current Load (A)
100%
80%
1.5
90%
85%
3.0V
5.0V
5.5V
80%
75%
70%
70%
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0
0.5
1
Current Load (A)
1.5
2
2.5
3
3.5
4
4.5
5
Current Load (A)
VPOL5A-5-SMT Vo=1.2V (Eff Vs Io)
VPOL5A-5-SMT Vo=0.75V (Eff Vs Io)
100%
100%
95%
95%
Efficincy (%)
Efficincy (%)
90%
90%
85%
3.0V
5.0V
5.5V
80%
75%
85%
80%
75%
3.0V
5.0V
5.5V
70%
65%
70%
60%
0
0.5
1
1.5
2
2.5
3
3.5
Current Load (A)
20050 SW 112th Ave. Tualatin, Oregon
4
4.5
5
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
Current Load (A)
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DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
VNL is the output voltage at no load
7.6 Input Capacitance at the Power Module
The SMTconvert ers must be connected to a low AC source
impedance. To a void problems with loop stability source inductance
should be low. Also, the input capacitors should be placed close to the
converter input pins to de-couple distribution inductance. However, the
external input capacitors are chosen for suitable ripple handling
capability. Low ESR polymers are a good choice. They have high
capacitance, high ripple rating and low ESR (typical <100mohm).
Electrolytic capacitors should be avoided. Circuit as shown in Figure 10
represents typical measurement methods for ripple current. Input
reflected-ripple current is measured with a simulated source Inductance
of 1uH. Current is measured at the input of the module.
The value of line regulation is defined as:
Line.reg =
VHL _ VLL
x 100%
VLL
Where: VHL is the output voltage of maximum input voltage at full load.
VLL is the output voltage of minimum input voltage at full load.
Current Meter
A
Power
Supply
+Vin
A
+Vo
+Sense
+
V 100uF
Voltage Meter
VPOL5A-5-SMT
Common
V
Common
To Oscilloscope
Figure 11. VPOL5A-5-SMT Test Setup
L1
+Vin
1uH
Power
+
2*100uF
Tantalum
Supply
VPOL5A-5-SMT
220uF
ESR<0.1ohm
Common
Figure 10. Input Reflected-Ripple Test Setup
7.7 Test Set-Up
The basic test set-up to measure parameters such as efficiency and
load regulation is shown in Figure 11. Things to not e are that this
converter is non-isolated, as such the input and output share a common
ground. These grounds should be connected together via low
impedance ground plane in the application circuit. When testing a
converter on a bench set-up, ensure that -Vin and -Vo are connected
together via a low impedance short to ensure proper efficiency and load
regulation measurements are being made. When testing the CUI INC’s
VPOL5A-5-SMT series under any transient conditions please ensure
that the transient response of the source is sufficient to power the
equipment under test. We can calculate the
Efficiency
Load regulation and line regulation.
The value of efficiency is defined as:
ç=
Vo x Io
x 100%
Vin x Iin
Where:
Vo is output voltage,
Io is output current,
Vin is input voltage,
Iin is input current.
The value of load regulation is defined as:
Load .reg =
VFL _ VNL
=100%
VNL
20050 SW 112th Ave. Tualatin, Oregon
97062 phone 503.612.2300 fax 503.612.2383
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Load
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rev.
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10 of 11
date
09/2010
DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
7.8 VPOL5A-5-SMT Series Output Voltage Adustment.
7.9 Output Ripple and Noise Measurement
The output Voltage of the VPOL5A-5-SMTS33A can be adjusted in the
range 0.75V to 3.63V by connecting a single resistor on the
motherboard (shown as Rtrim) in Figure 12. When Trim resistor is not
connected the output voltage defaults to 0.75V
The test set-up for noise and ripple measurements is shown in Figure
13. a coaxial cable with a 50ohm termination was used to prevent
impedance mismatch reflections disturbing the noise readings at higher
frequencies
+Vin
+Vin
+Vo
+Vo
Common
Common
Figure 12. Trim-up Voltage Setup
21070 _
5110 )
Vo _ 0.75
Rtrim-up is the external resistor in ohm,
Vo is the desired output voltage
To give an exa mple of the above calculation, to set a voltage of 3.3
Vdc, Rtrim is given by:
Where:
21070 _
5110 )
Vo _ 0.75
Rtrim = 3153 ohm
7.10 Output Capacitance
CUI INC’s VPOL5A-5-SMT series converters provide unconditional
stability with or without external capacitors. For good transient response
low ESR output capacitors should be located close to the point of load.
For high current applications point has already been made in layout
considerations for low resistance and low inductance tracks.
Output capacitors with its associated ESR values have an impact on
loop stability and bandwidth. CUI INC ’s converters are designed to
work with load capacitance up-to 3,000uF. It is reco mmended that any
additional capacitance, Maximum 3,000uF and low ESR, be connected
close to the point of load and outside the remote compensation point.
7.11 SMT Reflow Profile
An example of the SMT reflow profile is given in Figure 14.
Equipment used: SMD HOT AIR REFLOW HD-350SAR
Alloy: AMQ-M293TA or N C-SMQ92 IND-82088 SN63
For various output values various resistors are calculated and provided
in Table 3 for co nvenience.
Rtrim (Kohm)
Open
41.71
22.98
14.96
11.75
6.93
3.15
2.20
Table 3 – Trim Resistor Values
REFLOW PROFILE
240
200
TEMPERATURE (C)
Vo,set (V)
0.75
1.20
1.50
1.80
2.00
2.50
3.30
3.63
Common
Figure 13. Output Voltage Ripple and Noise Measurement Set-Up
The value of Rtrim-up defined as:
Rtrim = (
R-Load
Test Jack
R trim-up
Rtrim = (
1uF
Ceramic
R-Load
VPOL5A-5-SMT
Common
10uF
Tant.
VPOL5A-5-SMT
Trim
160
120
80
40
0
0
30
60
90
120 150 180 210 240
TIME (SECONDS)
Figure 14 SMT Reflow Profile
20050 SW 112th Ave. Tualatin, Oregon
97062 phone 503.612.2300 fax 503.612.2383
www.cui.com
For more information, please visit the product page.
rev.
page
11 of 11
date
09/2010
DESCRIPTION: point of load converter
PART NUMBER: VPOL5A-5-SMT
8. Mechanical Outline Diagrams
8.2 SMT Tape and Reel Dimensions
8.1 VPOL5A-5-SMT Mechanical Outline Diagrams
The Ta pe Reel dimensions for the SMT module is shown in Figure 16.
Dimensions are in millimeters and inches
Tolerance: x.xx ±0.02 in. (0.5mm) , x.xxx ±0.010 in. (0.25 mm) unless
otherwise noted
BOTTOM VIEW OF BOARD
0.80
(20.3)
0.190
(4.83)
0.35
(8.9)
0.160
(4.06)
0.160
(4.06)
0.24
(6.09)
0.180
(4.06)
3
2
1
GND
TRIM
VOUT
0.062
(1.57)
0.340
(8.64)
0.450
(11.43)
4
0.062
(1.57)
ON/OFF
VIN
5
0.06 (1.5)
Surface Mount Contact 5 Places
0.090
0.05 (1.3)
(2.29)
Dimensions are in Inches (millimeters)
Toleranc es :x.xx ± 0.02in.( x.x ± 0.5mm) , unless otherwise noted
x.xxx ± 0.010in. ( x.xx ± 0.25mm)
Figure 15 VPOL5A-5-SMT Mechanical Outline Diagram
W
Ao
Bo
Pin Function
Ko
P
1
2
+Vo
Trim
3
Common
F
E
D
4
5
Vin
On/Off
D1
Po
P2
t
Figure 16 – SMT Tape a nd Reel Dimensions
20050 SW 112th Ave. Tualatin, Oregon
97062 phone 503.612.2300 fax 503.612.2383
www.cui.com