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SC1214 PDF даташит

Спецификация SC1214 изготовлена ​​​​«Semtech» и имеет функцию, называемую «High Speed - Combi-Sense Two-Phase - Synchronous MOSFET Driver».

Детали детали

Номер произв SC1214
Описание High Speed - Combi-Sense Two-Phase - Synchronous MOSFET Driver
Производители Semtech
логотип Semtech логотип 

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SC1214 Даташит, Описание, Даташиты
POWER MANAGEMENT
SC1214
High Speed, Combi-SenseTM
Two-Phase, SynchronouwswwM.DaOtaSShFeEet4TU.Dcormiver
Description
Features
The SC1214 is a high speed, Combi-SenseTM, two-phase
driver designed to drive high-side and low-side MOSFETs
in two synchronous Buck converters. The driver com-
bined with Combi-Sense PWM controllers, such as
Semtech SC2643VX or SC2643, provides a cost effec-
tive two-phase voltage regulator for advanced micro-
processors
The Combi-SenseTM is a technique to sense the inductor
current for peak current mode control of voltage regula-
tor without using sensing resistor. It provides the follow-
ing advantages:
- No costly precision sensing resistor
- Lossless current sensing
- High level noise free signal
- Fast response
- Suitable for wide range of duty cycle
The detailed explanation of the technique can be found
in the Applications Information section.
u High efficiency
u +12V gate drive voltage
u High peak drive current
u Adaptive non-overlapping gate drives provide
shoot-through protection
u Support Combi-SenseTM and VID-on-fly operations
u Fast rise and fall times (15ns typical with 3000pf
load)
u Ultra-low (<30ns) propagation delay (BG going low)
u Floating top gate drive
u Crowbar function for over voltage protection
u High frequency (to 1.5 MHz) operation allows use
of small inductors and low cost ceramic capacitors
u Under-voltage-lockout
u Low quiescent current
A 30ns max propagation delay from input transition to
the gate of the power FET’s guarantees operation at high
switching frequencies. Internal overlap protection circuit
prevents shoot-through from Vin to PGND in the main
and synchronous MOSFETs. The adaptive overlap pro-
tection circuit ensures the bottom FET does not turn on
until the top FET source has reached 1V, to prevent cross-
conduction.
Applications
u Intel Pentium® processor power supplies
u AMD AthlonTM and AMD-K8TM processor power
supplies
u High current low voltage DC-DC converters
High current drive capability allows fast switching, thus
reducing switching losses at high (up to 1.5MHz) frequen-
cies without causing thermal stress on the driver.
Under-voltage-lockout and over-temperature shutdown
features are included for proper and safe operation.
Timed latches and improved robustness are built into
the housekeeping functions such as the Under Voltage
Lockout and adaptive Shoot-through protection circuitry
to prevent false triggering and to assure safe operation.
The SC1214 is offered in a TSSOP-20 package.
May 9, 2005
1 www.semtech.com









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SC1214 Даташит, Описание, Даташиты
POWER MANAGEMENT
Typical Application Circuit
SC1214
www.DataSheet4U.com
SC1214
11 DRN2 PGND 10
12 TG2
BG2 9
13 BST2 VREG2 8
14 CO2
VIN2 7
15 NC
VPN2 6
16 VPN1
NC 5
17 VIN1
CO1 4
18 VREG1 BST1 3
19 BG1
TG1 2
20 PGND DRN1 1
2005 Semtech Corp.
2
www.semtech.com









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SC1214 Даташит, Описание, Даташиты
SC1214
POWER MANAGEMENT
www.DataSheet4U.com
Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified
in the Electrical Characteristics section is not implied.
Parameter
Symbol
Conditions
Maximum
Units
VI N Supply Voltage
BST, TG to DRN
BST to PGND
BST to PGND Pulse
DRN to PGND
DRN to PGND Pulse
BG to PGND
VREG to PGND
VPN to PGND
VPN to PGND Pulse
PWM Input
VI N
V VBST-DRN, TG-DRN
VBST-PGND
VBST-PULSE
VDRN-PGND
VDRN-PULSE
VBG-PGND
VREG-PGND
VPN
VPN-PULSE
CO
tPULSE < 100ns
tPULSE < 200ns
tPULSE < 100ns
16
11
40
45
-2 to 30
-5 to 35
11
11
16
20
-0.3 to 8.5
V
V
V
V
V
V
V
V
V
V
V
Continuous Power Dissipation
Thermal Resistance Junction to Case
PD
TA = 25°C, TJ =125°C
1.76
17
W
°C/W
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering) 10 Sec.
TJ
TSTG
TLEAD
0 to +150
-65 to +150
300
°C
°C
°C
NOTE:
(1) This device is ESD sensitive. Use of standard ESD handling precautions is required.
Electrical Characteristics
Unless specified: TA = 25°C; VIN = 12V; VREG = 8.5V
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Power Supply
Supply Voltage
Quiescent Current, Operating
VI N
Iq_op
9 12 15 V
3.0 mA
Under Voltage Lockout
Start Threshold of VREG Voltage
Hysteresis
Internal LDO
VREG_START
VhysUVLO
4 4.3
160
V
mV
LDO Output
Drop Out Voltage
VREG
VDROP
VI N = 9V to 15V
VI N = 5V to 8.8V
8.5
0.3
V
V
2005 Semtech Corp.
3
www.semtech.com










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