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PDF NN30332A Data sheet ( Hoja de datos )
| Número de pieza | NN30332A | |
| Descripción | 10A Synchronous DC-DC Step down Regulator | |
| Fabricantes | Panasonic | |
| Logotipo |  |
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DReovcisNioon. . T3A4-EA-06197
Product Standards
NN30332A
http://www.semicon.panasonic.co.jp/en/
10 A Synchronous DC-DC Step down Regulator
with low quiescent power mode
(VIN = 4.5 V to 24 V, VOUT = 0.75 V to 3.6 V)
FEATURES
DESCRIPTION
High-Speed Response DC-DC Step Down Regulator
Circuit that employs Hysteretic Control System
Hi-side 20 m (Typ), Low-side 6 m (Typ) MOSFETs
for High efficiency at 10 A
Low Power Mode (discontinuous) for Light Load Efficiency
Maximum Output Current : 10 A
Input Voltage Range : AVIN = 4.5 V to 24 V,
PVIN = 4.5 V to 24 V,
V5 = 4.5 V to 5.5 V
Output Voltage Range : 0.75 V to 3.6 V
Selectable Switching Frequency 430 kHz / 630 kHz
Built-in Feed Back Resistors for 1.2 V / 1.05 V Output
Voltage (Also configurable using External Resistors)
NN30332A 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
Adjustable Soft Start
High Current Distributed Power Systems such as
Selectable Low Operating and Standby Quiescent
Current to achieve light load efficiency
Open Drain Power Good Indication for Output Over /
・PCs
・HDDs (Hard Disk Drives)
・SSDs (Solid State Drives)
Under Voltage
・Game consoles
Built-in Under Voltage Lockout (UVLO),
Thermal Shut Down (TSD), Under Voltage Detection (UVD),
Over Voltage Detection (OVD), Short Circuit Protection (SCP)
Over Current Protection (OCP),
24 pin Plastic Quad Flat Non-leaded Package Heat
Slug Down (QFN Type)
・Servers
・Security Cameras
・Network TVs
・Home Appliances
・OA Equipment etc.
(Size : 4 mm 4 mm 0.7 mm, 0.5 mm pitch)
SIMPLIFIED APPLICATION
V5
PVIN
AVIN
27 k
36 k
PVIN
EN
VOUT
AVIN
PGOOD
BST
NN30332A
VFB
V5
SS
3.3 nF
AGND
LX
PGND
100 k
0.1 µF
1 µH
VOUT = 1.05 V
V5 22 µF 4
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.
Established : 2013-07-29
Revised : 2014-02-18
Condition :
VIN = 12 V, VOUT Setting = 1.05 V,
Switching Frequency = 430 kHz, Low Power Mode / Normal Mode,
LO = 1 µH, CO = 88 µF (22 µF x 4) #Including V5 current
Page 1 of 42
1 page  
DReovcisNioon. . T3A4-EA-06197
Product Standards
NN30332A
ELECRTRICAL CHARACTERISTICS (Continued)
CO = 22 µF 4, LO = 1 µH, VOUT Setting = 1.05 V, VIN = AVIN = PVIN = 12 V, V5 = 5 V,
Switching Frequency = 430 kHz, VLP = 1 V (Normal Mode),
Ta = 25 C 2 C unless otherwise noted.
Parameter
VFB Characteristics
Symbol
Condition
Min
Limits
Typ
Max Unit Note
VFB comparator threshold
VFBTH
— 0.594 0.600 0.606 V —
VFB pin leakage current 1
VFB pin leakage current 2
Under Voltage Lock Out
ILEAKFB1
ILEAKFB2
VFB = 0 V
VFB = 6 V
–1 —
–1 —
1 µA —
1 µA —
UVLO shutdown voltage
VUVLODE V5 = 5 V to 0 V
4.15 4.20 4.25 V —
UVLO wakeup voltage
VUVLORE V5 = 0 V to 5 V
4.35 4.40 4.45 V —
UVLO hysteresis
PGOOD
PGOOD Threshold 1
(VFB ratio for UVD detect)
PGOOD Hysteresis 1
(VFB ratio for UVD release)
PGOOD Threshold 2
(VFB ratio for OVD detect)
PGOOD Hysteresis 2
(VFB ratio for OVD release)
PGOOD start up delay time
(After reached VFB = 0.6 V)
PGOOD ON resistance
VUVLO
—
VPGUV PGOOD : High to Low
VPGUV PGOOD : Low to High
VPGOV PGOOD : High to Low
VPGOV PGOOD : Low to High
VPDT
—
RPG
—
150 200 250 mV —
77 85 93 % —
3.5 5.0 6.5 % —
107 115 123 % —
3.5 5.0 6.5 % —
0.4 1.0 1.6 ms —
— 10 15 —
Established : 2013-07-29
Revised : 2014-02-18
Page 5 of 42
5 Page 
DReovcisNioon. . T3A4-EA-06197
Product Standards
NN30332A
OPERATION
1. Protection
(1) Over Current Protection (OCP) and
Short Circuit Protection (SCP)
1) The Over Current Protection is activated at about 12 A
(Typ). This device uses pulse – by – pulse valley
current protection method. When the low side power
MOSFET is turned on, the voltage across the drain
and source is monitored which is proportional to the
inductor current. The high side power MOSFET is only
allowed to turn on when the current flowing in the low
side power MOSFET falls below the OCP level.
Hence, during the OCP, the output voltage continues
to drop at the specified current. OCP is a non – latch
type protection.
2) The Short Circuit Protection function is implemented
when the output voltage decreases and the VFB pin
reaches to 60 % of the set voltage (0.6 V).
If the VFB voltage stays below 70 % of the set
voltage over 250 µs after SCP triggers, both
high side and low side power MOSFET will be latched
off and the output will be discharged by internal
MOSFET. Power reset or EN pin reset is necessary to
activate the device again.
Over Current Protection ( typ : 12 A )
10.5 A to 14 A
1)
(Ground short
2)
protection Detection
60% of Vout )
(2) Over Voltage Detection (OVD)
If the VFB pin voltage exceeds 115 % of the set
voltage (0.6 V) and lasts more than 10 ns, Over
Voltage Detection will be triggered and PGOOD pin will
be pulled down. Furthermore, in an over voltage
condition, high side power MOSFET is turned off to
stop PWM operation, and low side power MOSFET is
turned on and held on until the inductor current starts
to flow back to the device. If the VFB pin voltage drops
below 110 % of the set voltage within 2.2 ms after Over
Voltage Detection triggers, PGOOD pin will be pulled
up again and PWM operation will resume. Otherwise,
both high side and low side MOSFET will be latched off
and the output will be discharged by internal MOSFET.
Power reset or EN pin reset is necessary to activate
the device again.
115 %
110 %
VFB
90 %
85 %
0.6 V
PGOOD
0.6 V
< 2.2 ms
1 ms
> 2.2 ms
Note: PGOOD pin is pulled up to V5 pin
Figure : OVD Operation
Output current [A]
Figure : OCP and SCP Operation
(3) Output discharging function
When EN is low, the output is discharged by an
internal MOSFET that is connected to VOUT pin.
When EN is high, if the controller is turned off by
Under Voltage Lock Out, or the controller is latched off
by Over Voltage Detection or Short Circuit Protection,
the output is discharged by the above said internal
MOSFET.
The ON resistance of the internal MOSFET is 50 .
Established : 2013-07-29
Revised : 2014-02-18
Page 11 of 42
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet NN30332A.PDF ] | |
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