MIC5162 MICREL [Micrel Semiconductor], MIC5162 Datasheet

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MIC5162

Manufacturer Part Number
MIC5162
Description
Dual Regulator Controller For High-Speed Bus Termination
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet

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General Description
The MIC5162 is a dual regulator controller designed for high-
speed bus termination. It offers a simple, low-cost JEDEC
compliant solution for terminating high-speed, low-voltage
digital buses (i.e. DDR, SCSI, GTL, SSTL, HSTL, LV-TTL,
Rambus, LV-PECL, LV-ECL, etc).
The MIC5162 controls two external N-Channel MOSFETs to
form two separate regulators. It operates by switching be-
tween either the high-side MOSFET or the low-side MOSFET
depending on whether the current is being sourced to the load
or sinked by the regulator.
Designed to provide a universal solution for bus termination
regardless of input voltage, output voltage, or load current,
the desired MIC5162 output voltage can be programmed by
externally forcing the reference voltage.
The MIC5162 operates from an input of 1.35V to 6V, with a
second bias supply input required for operation. It is available
in the tiny MSOP-10 package with operating junction tem-
perature range of –40°C to +125°C.
Typical Application
V
February 2005
MIC5162
V
DDQ
CC
to 6.0V
= 1.35V
= 5.0V
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
V
IN
=2.5V to 1.5V
Typical SSTL-2 Application
EN
220pF
VDDQ
VCC
EN
COMP
FB
MIC5162BMM
3k
VREF
GND
HD
LD
120pF
SUD50N02-06
C
OUT
= 330µF
V
TT
Ordering Information
=
Standard
MIC5162BMM
1
/
2
V
1
DDQ
Features
• JEDEC Compliant Bus Termination for SCSI, GTL,
• DDR memory termination
• Tracking programmable output
• Requires minimal external components
• Wide bandwidth
• Input voltage range: 1.35V to 6V
• Logic controlled enable input
• Tiny MSOP-10 package
• Available –40°C < T
Applications
• Desktop computers
• Notebook computers
• Communication systems
• Video cards
Dual Regulator Controller For High-Speed Bus Termination
Part Number
SSTL, HSTL, LV-TTL, Rambus, LV-PECL, LV-ECL, etc.
Pb-Free
MIC5162YMM
MIC5162
J
< +125°C
Load Transient
TIME (200µs/div)
–40°C to +125°C
Temp Range
Junction
Sink 3A
Source 3A
M9999-092004
10-Pin MSOP
Package
0A
Micrel, Inc.

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MIC5162 Summary of contents

Page 1

... MIC5162 output voltage can be programmed by externally forcing the reference voltage. The MIC5162 operates from an input of 1.35V to 6V, with a second bias supply input required for operation available in the tiny MSOP-10 package with operating junction tem- perature range of – ...

Page 2

... MIC5162 Pin Configuration Pin Description Pin Number Pin Name 1 VCC VDDQ 4 VREF 5 GND Comp N/C M9999-092004 VCC VDDQ VREF 4 7 COMP GND 10-Lead MSOP Pin Function Bias Supply Input. Apply 5V to this input for internal bias to the controller. ...

Page 3

... MIC5162 Absolute Maximum Ratings Supply Voltage (V ) ...................................................... 7V CC Supply Voltage (V ) .................................................... 7V DDQ Enable Input Voltage (V ) ............................................. 7V EN Junction Temperature Range ............ –40°C < T Electrical Characteristics T = 25°C with V = 2.5V 5V DDQ CC circuit 1 for test circuit configuration. Parameter Condition V Voltage REF V Voltage Accuracy (Note 2) Sourcing ...

Page 4

... MIC5162 Test Circuit V = 1.8V DDQ or 2. 5.0V CC 220µF M9999-092004 MIC5162BMM VDDQ HD VCC 10µF COMP VREF 120pF 470pF FB GND 10k Figure 1. Test Circuit 4 Micrel, Inc. SUD50N02- × 560µF OUT February 2005 ...

Page 5

... MIC5162 Typical Characteristics [V – REF vs. Output Current OUTPUT CURRENT (A) V REF vs. Temperature 1.2625 V = 2.5V 1.2600 DDQ 1.2575 1.2550 1.2525 1.2500 1.2475 1.2450 1.2425 1.2400 1.2375 -40 - 100 120 TEMPERATURE (°C) February 2005 [V – ...

Page 6

... MIC5162 Functional Diagram V REF EN M9999-092004 V V DDQ Shutdown GND FB COMP Block Diagram 6 Micrel, Inc –A LD February 2005 ...

Page 7

... DDQ VREF Figure 1. The MIC5162 is a high performance linear controller, utilizing scalable N-Channel MOSFETs to provide JEDEC compliant bus termination. Termination is achieved by dividing down the V voltage by half, providing the reference (V DDQ voltage. An internal error amplifier compares the termination voltage (V ) and V ...

Page 8

... TT correctly externally compensated. For most applications, a 3kΩ resistor is recommended. The COMP pin on the MIC5162 is the output of the internal error amplifier. By placing a capacitor between the COMP pin and the feedback pin, this coupled with the feedback resistor places an external pole on the error amplifier. With a 3kΩ ...

Page 9

... N-Channel MOSFETs require an enhancement voltage greater than its source voltage. Typical N-Channel MOS- FETs have a gate-source threshold (V Since the source of the high side N-Channel is connected to ) thermal V , the MIC5162 greater than the V termination circuit has a V Channel that has low as 3.75V. With an N-Channel that has a 4.5V V ...

Page 10

... Oscon 1µF 10V GND -7A Load Transient TIME (200µs/div) M9999-092004 SUB75N03-07 VDDQ VCC HSD EN EN MIC5162BMM SUB75N03-07 VREF LSD 120pF Comp 220pF FB Figure 4. DDR2 Termination MIC5162 DDR2 -10 -20 -30 - CURRENT ( 0.9V@+/-7A TT SUB75N03-07 SUB75N03-07 680µ ...

Page 11

... MIC5162 Package Information 3.15 (0.122) 2.85 (0.114) 0.30 (0.012) 0.15 (0.006) 0.50 BSC (0.020) MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...

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