NN31001A Datasheet, PDF (1/36 Pages) Panasonic Semiconductor – 7 A Synchronous DC-DC Step down Regulator,

Doc No. TA4-EA-06262
Revision. 2
Product Standards
NN31001A
http://www.semicon.panasonic.co.jp/en/
7 A Synchronous DC-DC Step down Regulator,
Power Supply in Package
(V_IN = 4.5 V to 28 V, V_OUT = 0.6 V to 5.5 V)
FEATURES
DESCRIPTION
 High-Speed Response DC-DC Step Down Regulator Circuit
that employs Hysteretic Control System
 Built-in inductor and capacitors
 Skip (discontinuous) Mode for high efficiency at light load
Maximum Output Current : 7 A
 Input Voltage Range : PVIN=AVIN = 4.5 V to 28 V,
Output Voltage Range : 0.6 V to 5.5 V
Selectable Switching Frequency 400 kHz / 600 kHz / 800kHz
 Built-in Feed Back Resistors for 1.0 V / 3.3 V default settings
Configurable output voltage settings using external Resistors
 Adjustable Soft Start
 Low Operating and Standby Quiescent Current
 Open Drain Power Good Indication for Output Over / Under
Voltage
 Selectable Auto recovery / latch off protection system
 Adjustable current limit threshold
 Built-in Under Voltage Lockout (UVLO),
NN31001A is a synchronous DC-DC step down
regulator (1-ch), Power Supply in Package (PSiP), which
integrates a Controller IC that employs a hysteretic
control system, two Power MOSFETs, an Inductor and
Capacitors into a single 8.5 x 7.5 x 4.7mm QFN package.
The easiness of mounting PSiP onto a Printed Circuit
Board (PCB), a very small footprint and a highly reduced
number of external components, offers very compact
and simplified solutions for applications requiring point-
of-load design.
The number of external components have been reduced
to only input/output capacitor, slow start capacitor and
feedback resistors.
Furthermore, for applications requiring an output voltage
of 1.0 V / 3.3 V, the external feedback resistors can be
eliminated, resulting into even a smaller footprint.
The PSiP achieves efficiencies of greater than 94% with
very good power dissipation capabilities.
Thermal Shut Down (TSD), Under Voltage Detection (UVD), _APPLICATIONS
Over Voltage Detection (OVD), Short Circuit Protection (SCP)
Over Current Protection (OCP)
High Current Distributed Power Systems such as
・DSP and FPGA Point-of-Load Applications
 Plastic Quad Flat Non-leaded Package Heat Slug Down
・Routers
(QFN Type, Size : 8.5 mm  7.5 mm, 0.5 mm pitch)
・Industrial Equipment
・Space constrained Applications etc.
SIMPLIFIED APPLICATION
VREG
VIN
1k
1.5k
PVIN
AVIN
BST
LX
VFB
EN
PGOOD
PRTCNT
OCPCNT
NN31001A
VREG
MODE
FSEL
VOUTM
VOUT
SS
AGND1, 2 PGND
4.7nF
100k
V_OUT = 1.0V
#1.0V / 3.3V
without using FB resistor
22µF x 3
Note : The application circuit is an example. The operation of
the mass production set is not guaranteed. Sufficient
evaluation and verification is required in the design of
the mass production set. The Customer is fully
responsible for the incorporation of the above
illustrated application circuit in the design of the
equipment.
100
90
80
70
60
VOUT=1V, Fsw=400kHz
VOUT=1V, Fsw=600kHz
VOUT=1V, Fsw=800kHz
50
VOUT=3.3V, Fsw=600kHz
VOUT=3.3V, Fsw=800kHz
40
0.01
0.1
1
7 10
IOUT [A]
Condition :
Vin = 12 V, V_OUT Setting = 1.0 V / 3.3 V
Switching Frequency = 400 / 600 / 800 kHz, Skip mode
Co = 66 µF ( 22 µF x 3 )
Page 1 of 33
Established : 2014-07-03
Revised : 2014-07-08