OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MPQ4459DQT-LF-Z

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
MPQ4459
Industrial Grade,1.5A, 4MHz, 36V
Step-Down Converter
MPQ4459 Rev. 1.01 www.MonolithicPower.com 1
1/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MPQ4459 is a high frequency step-down
switching regulator with an integrated internal
high-side high voltage power MOSFET. It
provides 1.5A output with current mode control
for fast loop response and easy compensation.
The wide 3.8V to 36V input range
accommodates a variety of step-down
applications, including those in automotive
systems. A 120µA operational quiescent current
is suitable for use in battery-powered
applications.
The frequency foldback helps prevent inductor
current runaway during startup and thermal
shutdown provides reliable, fault tolerant
operation.
By switching at 4MHz, the MPQ4459 prevents
EMI (Electromagnetic Interference) noise
problems, such as those found in AM radio and
ADSL applications.
The MPQ4459 is available in thin 10-pin 3mm x
3mm TQFN package.
FEATURES
Guaranteed Industrial Temp Range
120A Quiescent Current
Wide 3.8V to 36V Operating Input Range
150m Internal Power MOSFET
Up to 4MHz Programmable Switching
Frequency
Ceramic Capacitor Stable
Internal Soft-Start
Precision Current Limit without a Current
Sensing Resistor
Up to 95% Efficiency
Output Adjustable from 0.8V to 30V
Available in 10-Pin 3x3 TQFN Package
APPLICATIONS
High Voltage Power Conversion
Automotive Systems
Industrial Power Systems
Distributed Power Systems
Battery Powered Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Quality Assurance. “MPS” and “The
Future of Analog IC Technology” are Registered Trademarks of Monolithi
c
Power Systems, Inc.
TYPICAL APPLICATION
MPQ4459
COMP
FB
FREQ
EN
4
5
7
3
VIN
GND
SW
BST
8, 9
6
1, 2
10
V
OUT
5V @ 1.5A
V
IN
4.5V to 36V
CONTROL
C3
150pF
10MQ100N
C4
100nF
100
90
80
70
60
50
40
30
20
EFFICIENCY (%)
0 500 1000 1500
LOAD CURRENT (mA)
Efficiency vs
Load Current
V
O
=3.3V
V
I
=5V
V
I
=12V
V
I
=24V
MPQ4459 – INDUSTRIAL GRADE, 1.5A, 4MHz, 36V STEP-DOWN CONVERTER
MPQ4459 Rev. 1.01 www.MonolithicPower.com 2
1/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking
MPQ4459DQT TQFN10(3mm x 3mm) N4
* For Tape & Reel, add suffix –Z (eg. MPQ4459DQT–Z)
For RoHS compliant packaging, add suffix –LF(eg. MPQ4459DQT–LF–Z)
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage (V
IN
).....................–0.3V to +40V
Switch Voltage (V
SW
)............ –0.3V to V
IN
+ 0.3V
BST to SW .....................................–0.3V to +6V
All Other Pins.................................–0.3V to +6V
Continuous Power Dissipation (T
A
= +25°C)
(2)
……………………………………………….2.5W
Junction Temperature...............................150C
Lead Temperature ....................................260C
Storage Temperature.............. –65°C to +150C
Recommended Operating Conditions
(3)
Supply Voltage V
IN
...........................3.8V to 36V
Output Voltage V
OUT
.........................0.8V to 30V
Operating Junct. Temp (T
J
)..... –40C to +125C
Thermal Resistance
(4)
θ
JA
θ
JC
3x3 TQFN10 ...........................50 ...... 12 ... C/W
Notes:
1) Exceeding these ratings may damage the device
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T
J
(MAX), the junction-to-
ambient thermal resistance
JA
, and the ambient temperature
T
A
. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by
P
D
(MAX)=(TJ(MAX)-TA)/
JA
. Exceeding the maximum
allowable power dissipation will cause excessive die
temperature, and the regulator will go into thermal shutdown.
Internal thermal shutdown circuitry protects the device from
permanent damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7, 4-layer PCB.
TOP VIEW
SW
SW
EN
COMP
FB
1
2
3
4
5
BST
VIN
VIN
FREQ
GND
10
9
8
7
6
EXPOSED PAD
ON BACKSIDE
MPQ4459 – INDUSTRIAL GRADE, 1.5A, 4MHz, 36V STEP-DOWN CONVERTER
MPQ4459 Rev. 1.01 www.MonolithicPower.com 3
1/24/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, V
EN
= 2.5V, V
COMP
= 1.4V, T
J
=–40C to +85C, unless otherwise noted. Typical values are
at T
J
=25C.
Parameter Symbol Condition Min Typ Max Units
T
J
=25C
0.776 0.8 0.824 V
Feedback Voltage V
FB
4.5V < V
IN
< 36V
0.770 0.830 V
Feedback Bias Current I
FB
V
FB
= 0.8V
0.01 1.0 A
Upper Switch On Resistance R
DS(ON)
V
BST
– V
SW
= 5V 150 m
Upper Switch Leakage V
EN
= 0V, V
SW
= 0V, V
IN
= 36V 1 A
Current Limit Duty Cycle = 50% 1.7 2.5 A
COMP to Current Sense
Transconductance
G
CS
4.7 A/V
Error Amp Voltage Gain
(5)
200 V/V
Error Amp Transconductance I
COMP
= ±3µA 20 60 100 µA/V
Error Amp Min Source current V
FB
= 0.7V 5 µA
Error Amp Min Sink current V
FB
= 0.9V –5 µA
VIN UVLO Threshold 2.55 3.0 3.45 V
VIN UVLO Hysteresis 0.35 V
Soft-Start Time
(5)
0V < V
FB
< 0.8V 1.5 ms
R
FREQ
= 45k 1.55 2 2.45 MHz
Oscillator Frequency f
S
R
FREQ
= 18k 3.1 4 4.9 MHz
Shutdown Supply Current V
EN
= 0V 12 18 µA
Quiescent Supply Current I
Q
No load, V
FB
= 0.9V 120 165 µA
Thermal Shutdown 150
C
Thermal Shutdown Hysteresis 15
C
Minimum Off Time 100 ns
Minimum On Time
(5)
100 ns
EN Up Threshold 1.2 1.5 1.8 V
EN Threshold Hysteresis 300 mV
Note:
5) Guaranteed by design.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

MPQ4459DQT-LF-Z

Mfr. #:
Buy MPQ4459DQT-LF-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Switching Voltage Regulators 1.5A/36V 4MHz Step-Down Converter
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet