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NGA SERIES
Non-Isolated Wide Input DC/DC Converters
SELECTION GUIDE1
Nominal Output Input Voltage Voltage Output Current Nominal Input Current @ Full Load Power Nominal Consumption @ Efficiency Shutdown
Min Full Min Nom Max Min Nom Max Min Max Load Load VIN VIN VIN VIN VIN VIN VIN VIN
Order Code
NGA10S15018S NGA10S15025S NGA10S15033S NGA10S15050S2
(V) 15 15 15 15
(V) 1.8 2.5 3.3 5.0
A 0 0 0 0 2.0 2.0 2.0 2.0 847 1142 1478 1493
mA 280 380 480 705
160 210 269 388
0.5 0.5 0.5 1.0
mW 4.8 4.8 4.8 4.8
% 16.1 16.1 16.1 16.1 89 92 94 95 81 85 88 92
INPUT CHARACTERISTICS1
Parameter Conditions MIN TYP MAX Units
FEATURES Industry Standard Footprint Short Circuit Protection Efficiency to 95% Wide Input Range 1.8V, 2.5V, 3.3V & 5V Output Operating Temperature Range -40C to 85C SMD Construction Optional Shutdown & Trim Pins DESCRIPTION
The NGA series is a range of low profile DC/DC converters offering a single regulated output over a wide input voltage range. All parts deliver the full output power up to 85C without the need for external heatsinking while the synchronus rectification design yields excellent efficiencies up to 95%.
Continuous operation 4.75 Voltage Range 1.8,2.5 & 3.3V output types Continuous operation NGA10S15050S 7.0 Continuous operation NGA10S15050SE Variable3 1.8V output types Reflected Ripple 2.5V output types Current 3.3V output types 5.0V output types
15 15 15 29 49 48 99
28 28 28
VDC
mA p-p
OUTPUT CHARACTERISTICS1
Parameter Conditions MIN TYP MAX Units
Rated Power Voltage Set Point Accuracy
TA = -40C to 85C 1.5 0.2 1.5 40
10 5.0 0.5 2.0 70
W % %/% % mVp-p
Low line to high line, Line Regulation with external input/output capacitors, refer to test circuit 10% load to 100% load, Load Regulation with external input/output capacitors, refer to test circuit BW = DC to 20MHz Ripple & Noise With external input/output capacitors, refer to test circuit
ABSOLUTE MAXIMUM RATINGS
Short circuit protection Internal power dissipation Lead temperature 1.5mm from case for 10 seconds Input Voltage VIN Minimum load Output Trim Control Shutdown Control Continuous 1.1W 300C 28V 0% 0V to +5V relative to 0V -0.3V to +28V relative to 0V
ENVIRONMENTAL1
Parameter Conditions MIN TYP MAX Units
Operation Storage PCB Temperature above Ambient
- 40 - 50 40
85 125
C C C
TERMINOLOGY TRANSIENT RESPONSE
Time for VOUT to be within 1% of VNOM where VNOM = VOUT 25% +VOUT 75% 2
OVER-SHOOT/UNDER-SHOOT
MAX deviation from final steady state output.
START DELAY
Typical rise time (ms) after control pin high with valid input.
1 Specifications typical at TA =25C, nominal input voltage and rated output current unless otherwise specified. 2. If optional VADJ and SD pin are required (as indicated in the mechanical dimensions diagram) suffix the part number with an E when ordering, i.e. NGA10S15050SE. 3. Supply voltage should exceed output voltage by 1.45V.
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NGA SERIES
Non-Isolated Wide Input DC/DC Converters
GENERAL CHARACTERISTICS1
Parameter Conditions MIN TYP MAX Units
Switching Frequency Transient Response MAX Over-Shoot 50% load change, 1.8V output types 50% load change, 2.5V output types 50% load change, 3.3V output types 50% load change, 5.0V output types 50% load change, 1.8V output types 50% load change, 2.5V output types 50% load change, 3.3V output types 50% load change, 5.0V output types 1.8, 2.5 & 3.3V output types 5.0V output types VIN MIN to VIN MAX 400VDC from 100pF capacitor via 1500 resistance
270
Transient Response MAX Under-Shoot Under Voltage Lock Out Start Delay ESD
300 330 kHz 90(160) 84(145) mV(s) 83(130) 75(40) 64(160) 86(145) mV(s) 84(120) 74(80) 4.0 V 5.0 100 ms Meets MIL-STD-833E method 3015.7
MECHANICAL DIMENSIONS
3 Pin SIP Package Style
0.825 (20.96)
0.22 (5.60)
PIN CONNECTIONS
Pin Number
1* SD
2 VIN
3 GND
4 VOUT
5* VADJ
0.846 (21.49)
RECOMMENDED FOOTPRINT DETAILS
5* 4 0.312 (7.92)
3
2
1 * 0.0140.002 (0.350.05)
0.1 (2.54)
0.057(1.45) O 0.051(1.30) O 0.004(0.10)
0.1 (2.54)
0.1 (2.54)
All pins on a 0.1(2.54) pitch and within 0.01(0.25) of true position.
0.149 (3.78)
0.877 (22.29)
1 *
2
3
4
5* 0.020.002 (0.500.05)
0.161 (4.1)
1 Specifications typical at TA =25C, nominal input voltage and rated output current unless otherwise specified. Unless otherwise stated all dimensions in inches(mm) 0.01(0.25). * Optional pins available on NGA10S15050SE only.
Weight: 4.0g
NGA SERIES
Non-Isolated Wide Input DC/DC Converters
APPLICATION NOTES EXTERNAL CAPACITANCE
External capacitors are necessary in order to guarantee stability and full parametric performance over the full line and load range. All parts have been tested and characterised using the following values and test circuit. Value1 CIN 100F, 50V COUT 100F, 10V
SHUTDOWN
When the shutdown pin is shorted to the 0V, the device's output will be disabled. To shutdown the device the pin should be taken below 0.8V using either an open collector pull down or by using isolated relay contacts. To enable the device output the shutdown pin should be left floating or taken no less than +1.5V to MAX (+28V). If the shutdown pin is to be connected to a long wire, it is recommended that a capacitor (10nF) decouples the shutdown pin to the 0V in order to avoid the risk of injecting noise into the device circuit. VOUT
VOLTAGE TRIMMING
The trimming (adjust) input on the device allows output voltage adjustment to within 5%2 of the desired VOUT using a resistor with a value determined by the following equations. When open circuit, the output will be +5V. A resistor (RD) between the trim pin and the output pin will adjust the output voltage between +5V to +1.8V. 1 = (22(1.028VO-1))-1-0.011 RD VIN
TEST CIRCUIT
VIN + CIN
NGA
+
NGA
VADJ
VOUT RD
COUT OFF
NGA
ON TTL 1K BC182 or equiv 10nF (optional)
0V SD A resistor (RU) between the trim pin and the 0V pin will adjust the device output from +5V to +5.5V. 1 = (1.02VO)-1 91 RU VIN 0.0455
GND
GND
NGA
VADJ RU
VOUT
1 Specifications typical at TA =25C, nominal input voltage and rated output current unless otherwise specified. 2 Accuracy of adjustment is subject to tolerance of resistors and initial output accuracy.
SD
0V
C&D Technologies (NCL) Limited reserve the right to alter or improve the specification, internal design or manufacturing process at any time, without notice. Please check with your supplier or visit our web site to ensure that you have the current and complete specification for your product before use. (c) C&D Technologies (NCL) Limited 2003 NDC NGA.3 No part of this publication may be copied, transmitted or stored in a retrieval system or reproduced in any way including, but not limited to, photography, photocopy, magnetic or other recording means, without prior written permission from C&D Technologies (NCL) Limited. Instructions for use are available from www.cdpoweronline.com
C&D Technologies (NCL) Ltd Tanners Drive, Blakelands North Milton Keynes MK14 5BU, England Tel: +44 (0)1908 615232 Fax: +44 (0)1908 617545 email: info@cdtechno-ncl.com www.cdpoweronline.com
C&D Technologies Inc. 3400 E Britannia Drive, Tucson, Arizona 85706, USA Tel: +1 (800) 547-2537 Fax: +1 (520) 741-4598 email: sales@cdtechno.com

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