MPQ4456 Datasheet, PDF (2/16 Pages) Monolithic Power Systems – Industrial Grade ,1A, 4MHz, 36V Step-Down Converter

MPQ4456 –INDUSTRIAL GRADE, 1A, 4MHz, 36V STEP-DOWN CONVERTER
ORDERING INFORMATION
Part Number*
Package
Top Marking
MPQ4456GQT
TQFN10 (3mm x3mm)
AFD
* For Tape & Reel, add suffix –Z (e.g. MPQ4456GQT–Z).
PACKAGE REFERENCE
TOP VIEW
SW
1
SW
2
EN
3
COMP
4
FB
5
EXPOSED PAD
ON BACKSIDE
10 BST
9
VIN
8
VIN
7
FREQ
6
GND
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 .............................. 150°C
Lead Temperature ................................... 260°C
Storage Temperature.............. –65°C to +150°C
Recommended Operating Conditions ⁽³⁾
Supply Voltage V_IN .......................... 3.8V to 36V
Output Voltage V_OUT........................ 0.8V to 36V
Operating Junct. Temp (T_J)..... –40°C to +125°C
Thermal Resistance ⁽⁴⁾ θ_JA θ_JC
TQFN10 (3mm x3mm) ........... 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 TJ (MAX), the junction-to-
ambient thermal resistance θJA, and the ambient temperature
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD (MAX) = (TJ
(MAX)-TA)/θJA. 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 board.
MPQ4456 Rev. 1.0
www.MonolithicPower.com
2
2/8/2013
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