NN30312A Datasheet, PDF (1/28 Pages) Panasonic Battery Group – Synchronous DC-DC Step down Regulator comprising of Controller IC and Power MOSFET

NN30312A
VIN = 4.5 V to 30 V, 10 A
Synchronous DC-DC Step down Regulator
comprising of Controller IC and Power MOSFET
FEATURES
z High-Speed Response DC-DC Step Down Regulator
Circuit that employs Hysteretic Control System
z Two 11 mΩ (Typ.)
MOSFETs for High Efficiency at 10 A
z SKIP (discontinuous) Mode for Light Load Efficiency
z Up to 10 A Output Current
z Input VoltageRange : AVIN : 4.5 V to 30 V,
PVIN : 4.5 V to 30 V,
Output Voltage Range : 0.75 V to 5.5 V
Selectable Switching Frequency 250 kHz , 750 kHz ,
1250 kHz
z Adjustable Soft Start
z Low Operating and Standby Quiescent Current
z Open Drain Power Good Indication for Output Over ,
Under Voltage
z Built-in Under Voltage Lockout (UVLO),
Thermal Shut Down (TSD),
Over Voltage Detection (OVD),
Under Voltage Detection (UVD),
Over Current Protection (OCP),
Short Circuit Protection (SCP)
z HQFN040-A3-0606B ( Size : 6 mm X 6 mm, 0.5 mm
pitch ), 40pin Plastic Quad Flat Non-leaded Package
Heat Slug Down (QFN Type)
DESCRIPTION
NN30312A is a synchronous DC-DC Step down
Regulator (1-ch) comprising of a Controller IC and two
power MOSFETs and employs the hysteretic control
system.
By this system, when load current changes suddenly, it
responds at high speed and minimizes the changes of
output voltage.
Since it is possible to use capacitors with small
capacitance and it is unnecessary to add external parts
for system phase compensation, this IC realizes
downsizing of set and reducing in the number of external
parts. Output voltage is adjustable by user.
Maximum current is 10 A.
APPLICATIONS
High Current Distributed Power Systems such as
・HDDs (Hard Disk Drives)
・SSDs (Solid State Drives)
・PCs
・Game consoles
・Servers
・Security Cameras
・Network TVs
・Home Appliances
・OA Equipment etc.
SIMPLIFIED APPLICATION
PVIN
AVIN
1.5k Ω
1k Ω
EN
PVIN
VOUT
AVIN
PGOOD
BST
NN30312A
VFB
VREG SS
1μF 10nF
LX
AGND PGND
VREG
100
90
100k Ω
80
70
60
50
0.1μF
4.7μH
DCDCOUT
1.05 V
40
30
22μF x 3 ²⁰
10
0
EFFICIENCY CURVE
Frequency = 250 kHz
FCCM/ Vo= 1.05V
FCCM/ Vo= 1.2V
FCCM/ Vo= 1.8V
FCCM/ Vo= 3.3V
FCCM/ Vo= 5.0V
SKIP/ Vo= 1.05V
SKIP/ Vo= 1.2V
SKIP/ Vo= 1.8V
SKIP/ Vo= 3.3V
SKIP/ Vo= 5.0V
Notes) This application circuit is an example. The operation
of mass production set is not guaranteed. You should
perform enough evaluation and verification on the
design of mass production set. You are fully
responsible for the incorporation of the above
application circuit and information in the design of
your equipment.
IOUT (A)
Condition )
V_IN = 12 V, Vout = 1.05 V , 1.2 V , 1.8V , 3.3V , 5.0 V,
L = 4.7 µH, Cout = 66 µF ( 22 µF x 3 ), Frequency = 250 kHz
Publication date: October 2012
1
Ver. CEB