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SC452 PDF даташит

Спецификация SC452 изготовлена ​​​​«Semtech Corporation» и имеет функцию, называемую «Dual-Phase Single Chip IMVP-6 Vcore Power Supply».

Детали детали

Номер произв SC452
Описание Dual-Phase Single Chip IMVP-6 Vcore Power Supply
Производители Semtech Corporation
логотип Semtech Corporation логотип 

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SC452 Даташит, Описание, Даташиты
NOT RECOMMENDED FOR NEW DESIGN
SC452
Dual-Phase Single Chip
IMVP-6 Vcore Power Supply
POWER MANAGEMENT
Description
Features
The SC452 is a single chip high-performance PWM con-
troller designed to power advanced IMVP-6™ processors.
On-chip support is provided for all of the IMVP-6 require-
ments, including Active Voltage Positioning, Geyserville-3
VID transitions, VID-controlled Deeper Sleep voltage set-
ting, PSI# and DPRSL control, fast/slow C4 exit, and de-
fault Boot voltage.
The SC452 implements hysteretic control technology
which provides the fastest possible transient response
while avoiding the stability issues inherent to classical
PWM controllers. Semtech’s proprietary Combi-Sense®
technology provides a loss-less current sensing scheme
which is extremely robust and easy to lay out. Eliminat-
ing the sense resistors reduces costs and PCB area, plus
increases system efciency. Integrated SmartDriver™
technology initially turns on the high side driver with ‘soft’
drive to reduce ringing, EMI, and capacitive turn-on of the
low side MOSFET, while also increasing overall efciency.
Dual-Phase Solution with Integrated Drivers
Hysteretic Control for Fast Transient Response
Combi-Sense Provides Loss-Less Current Sensing
Dynamic Current Sharing
Active Voltage Positioning
True Differential Remote (die) Sensing
On-Chip Support for all IMVP-6 Power Management
Features
VID Programmed Deeper Sleep Voltage
Fast/Slow C4E Break-Event Support
Clock Enable (CLKEN#) Output
Delayed Power Good Signal with Blanking
Programmable Soft-Start and DAC Slew Control
Programmable OCP Threshold
Supports all Ceramic Decoupling Solutions
44 pin MLP (7x7)
Lead-free Package
Hysteretic operation adaptively reduces the SC452
switching frequency at light loads. Combined with an
automatic “power-save” mode which prevents negative
current ow in the low-side FET, system efciency is sig-
nicantly enhanced during light loading conditions. The
SC452 changes from dual-phase to single-phase opera-
tion whenever PSI# asserts, providing optimal efciency
across the entire power range.
Applications
IMVP-6/6+ Notebook PCs
Embedded Applications
Graphics and Other Processor Cores
A 7-bit DAC, accurate to 0.85%, sets the output voltage
reference, and implements the 0.300V to 1.500V range
required by the processor. The DAC slew rate is externally
programmed to minimize transient currents and audible
noise. True differential remote sensing provides accu-
rate point-of-load regulation at the processor die. Other
features include programmable soft-start, open-drain
IMVP6_PWRGD and CLKEN# outputs, dynamic current
sharing, over-voltage and programmable over-current pro-
tection. The SC452 is available in a space-saving 44 pin
MLP package.
February 22, 2006 1 www.semtech.com









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SC452 Даташит, Описание, Даташиты
NOT RECOMMENDED FOR NEW DESIGN
POWER MANAGEMENT
Typical Application Circuit
SC452
© 2006 Semtech Corp.
2 United States Patent No. 6,441,597









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SC452 Даташит, Описание, Даташиты
NOT RECOMMENDED FOR NEW DESIGN
SC452
POWER MANAGEMENT
Absolute Maximum Ratings
Exceeding the specications below may result in permanent damage to the device or device malfunction. Operation outside of the parameters specied in the
Electrical Characteristics section is not implied.
Parameter
Condition
Min Max Units
Supply Voltages VCCA V5_1, V5_2
BST1, BST2 to PGND
Static
Transient <100ns
BST1, BST2 to DRN1, DRN2
DRN1, DRN2 to PGND
Static
Transient <100ns
TG1, TG2 to PGND
BG1, BG2 to PGND
VIN1, VIN2 to PGND
VPN1, VPN2 to PGND
PGND to AGND
All other pins to AGND
Thermal Resistance Junction to Ambient
Operating Junction Temperature Range
Storage Temperature Range
Peak IR Reflow (10-40sec)
ESD Rating (Human Body Model)
Electrical Characteristics
Unless otherwise specied, VccA = V5_1 = V5_2 =5 V. -40<TJ<+125°C.
Parameter
Condition
θJA
TJ
TSTG
TIRreflow
VESD
Min
-0.3
-0.3
-0.3
-0.3
-2
-5
DRN 1, 2-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-40
-65
6.5
30
34
6
25
29
BST1, 2+0.3
V5_1, 2+0.3
25
VIN1, 2+0.3
0.3
VCCA+0.3
2291
125
150
260
2
V
V
V
V
V
V
V
V
V
V
V
V
oC/W
oC
oC
oC
kV
Typ Max Units
Supplies (VccA, V5_1, V5_2)
VccA,V5_1, V5_2
Operating Range
4.5 5.0 5.5 V
VBAT Operating Range
VccA, V5_2 UVLO
4.5
Rising 4.25 4.4
24
4.5
V
V
Hysteresis Falling
50
150
250
mV
VccA Current
Disabled
10 μA
In UVLO
0.6 1.0 mA
Operating (Static)
5
10
15 mA
© 2006 Semtech Corp.
3 United States Patent No. 6,441,597










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