LMZ12002TZE-ADJ/NOPB National Semiconductor, LMZ12002TZE-ADJ/NOPB Datasheet

IC BUCK SYNC ADJ 2A TO-PMOD-7

LMZ12002TZE-ADJ/NOPB

Manufacturer Part Number
LMZ12002TZE-ADJ/NOPB
Description
IC BUCK SYNC ADJ 2A TO-PMOD-7
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Point of Load (POL) Non-Isolated with UVLOr
Datasheet

Specifications of LMZ12002TZE-ADJ/NOPB

Output
0.8 ~ 6 V
Number Of Outputs
1
Power (watts)
12W
Mounting Type
Surface Mount
Voltage - Input
4.5 ~ 20V
Package / Case
TO-PMOD-7, Power Module
1st Output
0.8 ~ 6 VDC @ 2A
Size / Dimension
0.40" L x 0.54" W x 0.18" H (10.16mm x 13.77mm x 4.57mm)
Power (watts) - Rated
12W
Operating Temperature
-40°C ~ 125°C
Efficiency
92%
Approvals
EN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
3rd Output
-
2nd Output
-
© 2010 National Semiconductor Corporation
2A SIMPLE SWITCHER® Power Module with 20V Maximum
Input Voltage
Electrical Specifications
Key Features
Applications
12W maximum total power output
Up to 2A output current
Input voltage range 4.5V to 20V
Output voltage range 0.8V to 6V
Efficiency up to 92%
Integrated shielded inductor
Simple PCB layout
Flexible startup sequencing using external soft-start
capacitor and precision enable
Protection against inrush currents and faults such as input
UVLO and output short circuit
-40°C to 125°C junction temperature range
Single exposed pad and standard pinout for easy
mounting and manufacturing
Fast transient response for FPGAs and ASICs
Low output voltage ripple
Pin-to-pin compatible family:
LMZ14203/2/1 (42V max 3A, 2A, 1A)
LMZ12003/2/1 (20V max 3A, 2A, 1A)
Fully Webench® Power Designer enabled
Point of load conversions from 5V and 12V input rail
Time critical projects
Space constrained high thermal requirement applications
Negative output voltage applications (See AN-2027)
10.16 x 13.77 x 4.57 mm (0.4 x 0.542 x 0.18 in)
θ
Easy to use 7 pin package
JA
TO-PMOD 7 Pin Package
= 20°C/W, θ
RoHS Compliant
JC
= 1.9°C/W
301147
30114786
LMZ12002
Performance Benefits
System Performance
Operates at high ambient temperature with no thermal
derating
High efficiency reduces system heat generation
Low radiated emissions (EMI) complies with EN55022
class B standard
Low external component count
Radiated Emissions (EN 55022 Class B)
Efficiency V
Thermal derating curve
from Evaluation Board
V
IN
= 12V V
IN
= 12V V
OUT
= 5.0V
OUT
30114719
30114718
= 5.0V
30114750
June 10, 2010
www.national.com

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LMZ12002TZE-ADJ/NOPB Summary of contents

Page 1

... Point of load conversions from 5V and 12V input rail ■ Time critical projects ■ Space constrained high thermal requirement applications ■ Negative output voltage applications (See AN-2027) © 2010 National Semiconductor Corporation LMZ12002 Performance Benefits ■ Operates at high ambient temperature with no thermal derating ■ ...

Page 2

... Simplified Application Schematic Connection Diagram Ordering Information Order Number LMZ12002TZ-ADJ LMZ12002TZX-ADJ LMZ12002TZE-ADJ Pin Descriptions Pin Name Description 1 VIN Supply input — Nominal operating range is 4.5V to 20V . A small amount of internal capacitance is contained within the package assembly. Additional external input capacitance is required between this pin and exposed pad. ...

Page 3

Pin Name Description 6 FB Feedback — Internally connected to the regulation, over-voltage, and short-circuit comparators. The regulation reference point is 0.8V at this input pin. Connected the feedback resistor divider between the output and ground to set the output ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VIN, RON to GND EN, FB GND Junction Temperature Storage Temperature Range Electrical Characteristics junction temperature (T ) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design or statistical J correlation ...

Page 5

Symbol Parameter η Efficiency η Efficiency Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For guaranteed specifications and ...

Page 6

Efficiency 6V Input @ 25°C Efficiency 8V Input @ 25°C Efficiency 12V Input @ 25°C www.national.com Dissipation 6V Input @ 25°C 30114721 Dissipation 6V Input @ 25°C 30114755 Dissipation 12V Input @ 25°C 30114703 6 30114722 30114756 30114704 ...

Page 7

Efficiency 20V Input @ 25°C 30114757 Efficiency 4.5V Input @ 85°C 30114759 Efficiency 5V Input @ 85°C 30114761 Dissipation 20V Input @ 25°C Dissipation 4.5V Input @ 85°C Dissipation 5V Input @ 85°C 7 30114758 30114760 30114762 www.national.com ...

Page 8

Efficiency 6V Input @ 85°C Efficiency 8V Input @ 85°C Efficiency 12V Input @ 85°C www.national.com Dissipation 6V Input @ 85°C 30114733 Dissipation 8V Input @ 85°C 30114740 Dissipation 12V Input @ 85°C 30114742 8 30114734 30114741 30114743 ...

Page 9

Efficiency 20V Input @ 85°C 30114763 Line and Load Regulation @ 25°C 30114748 Output Ripple 12V 3.3V 2A 20mV/div 1μSec/div IN O 30114705 Dissipation 20V Input @ 85°C Line and Load Regulation @ 85°C Transient Response 12V 3.3V 0.6A to ...

Page 10

Current Limit 1.8V Current Limit 3.3V Application Block Diagram www.national.com @ 25°C OUT 30114765 @ 85°C OUT 30114768 10 Current Limit 3.3V @ 25°C OUT 30114767 Thermal Derating V = 1.8V OUT 30114749 30114708 ...

Page 11

General Description The LMZ12002 SIMPLE SWITCHER® power module is an easy-to-use step-down DC-DC solution capable of driving load with exceptional power conversion efficiency, line and load regulation, and output accuracy. The LMZ12002 is available in an innovative ...

Page 12

SS pin. Voltage levels between 0.8V and 3.8V have no effect on other circuit operation. Note that the following conditions will reset the soft-start capacitor by discharging the SS input to ground ...

Page 13

CCM and DCM Operating Modes = 2A/0.26A 2 μsec/div V = 12V 3.3V The approximate formula for determining the DCM/CCM boundary is as follows: ≊ )/(2*10 μH *(V –V *V DCB O ...

Page 14

LMZ12002 to minimize noise. 4. Make input and output bus connections as wide as possible. This reduces any voltage drops on the input or output of the converter and maximizes efficiency. ...

Page 15

... ENT R 11.8 kΩ ENB C 22 nF, ±10%, X7R, 16V nF, ±10%, X7R, 16V SS Case Size Case Size TO-PMOD-7 National Semiconductor 1206 Taiyo Yuden 1210 Taiyo Yuden 1206 Taiyo Yuden 1210 Taiyo Yuden 0603 Vishay Dale 0603 Vishay Dale 0603 Vishay Dale ...

Page 16

www.national.com 16 30114716 30114717 ...

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Physical Dimensions inches (millimeters) unless otherwise noted 7-Lead TZA Package NS Package Number TZA07A 17 www.national.com ...

Page 18

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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