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ISL78200 の電気的特性と機能

ISL78200のメーカーはIntersil Corporationです、この部品の機能は「2.5A Regulator」です。


製品の詳細 ( Datasheet PDF )

部品番号 ISL78200
部品説明 2.5A Regulator
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 




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ISL78200 Datasheet, ISL78200 PDF,ピン配置, 機能
www.DataSheet.co.kr
2.5A Regulator with Integrated High-Side MOSFET for
Synchronous Buck or Boost Buck Converter
ISL78200
The ISL78200 is a synchronous buck controller with a 90m
high side MOSFET and low side driver integrated. The ISL78200
supports a wide input voltage range from 3V to 40V. Regarding
the output current capability, the ISL78200 can typically support
a continuous load of 2.5A under conditions of 5V VOUT, VIN
range of 8V to 36V, 500kHz, +85°C ambient temperature with
still air. For any specific application, the actual maximum output
current depends upon the die temperature not exceeding
+125°C with the power dissipated in the IC, which is related to
input voltage, output voltage, duty cycle, switching frequency,
ambient temperature and board layout, etc. Refer to the Output
Current section on page 14 for more details.
The ISL78200 has flexible selection of operation modes of
forced PWM mode and PFM mode. In PFM mode, the
quiescent input current is as low as 300µA and can be further
reduced to 180µA with AUXVCC connected to VOUT under 12V
VIN and 5V VOUT application. The load boundary between PFM
and PWM can be programmed to cover wide applications.
The low side driver can be either used to drive an external low
side MOSFET for a synchronous buck, or left unused for a
standard non-synchronous buck. The low side driver can also
be used to drive a boost converter as a pre-regulator that
greatly expands the operating input voltage range down to 3V
or lower (refer to “Typical Application Schematic III - Boost
Buck Converters” on page 5).
The ISL78200 offers the most robust current protections. It
uses peak current mode control with cycle-by-cycle current
limiting. It is implemented with frequency foldback under
current limit condition; in addition, the hiccup overcurrent
mode is also implemented to guarantee reliable operations
under harsh short conditions.
The ISL78200 has comprehensive protections against various faults
including overvoltage and over-temperature protections, etc.
Features
• Ultra Wide Input Voltage Range 3V to 40V
• Selectable Mode Operation
- Forced PWM Mode
- PFM Mode
- Programmable Current Boundary between PFM and PWM
Modes
• 300µA IC Quiescent Current (PFM, No Load); 180µA Input
Quiescent Current (PFM, No Load, VOUT Connected to AUXVCC)
• Less than 3µA Standby Input Current (IC Disabled)
• Operational Topologies
- Synchronous Buck
- Non-Synchronous Buck
- Two Stage Boost Buck
• Programmable Frequency from 200kHz - 2.2MHz and
Frequency Synchronization Capability
±1% Tight Voltage Regulation Accuracy
• Reliable Cycle by Cycle Overcurrent Protection
- Temperature Compensated Current Sense
- Frequency Foldback
- Programmable OC Limit
- Hiccup Mode Protection in Worst Case Short Condition
• 20 Ld HTSSOP Package
• Pb-Free (RoHS Compliant)
Applications
Automotive Applications
• General Purpose Power Regulator
• 24V Bus Power
• Battery Power
• Embedded Processor and I/O Supplies
PGOOD
EN
MODE
SYNC
AUXVCC
VIN
BOOT
VCC
ILIMIT
SS
ISL78200 PHASE
LGATE
PGND
EXT_BOOST
FS
SGND
FB
COMP
VIN
FIGURE 1. TYPICAL APPLICATION
VOUT
100
95 6V VIN
90
85 12V VIN
80
75 40V VIN
70 24V VIN
65
60
55
50
0.1m
1m
10m
100m
1
LOAD CURRENT (A)
FIGURE 2. EFFICIENCY, SYNCHRONOUS BUCK, PFM MODE,
VOUT 5V, TA = +25°C
2.5
September 22, 2011
FN7641.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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1 Page





ISL78200 pdf, ピン配列
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ISL78200
Functional Pin Description (Continued)
PIN NAME
PHASE
EXT_BOOST
SYNC
LGATE
PD
PIN #
16, 17
18
19
20
21
DESCRIPTION
These pins are the PHASE nodes that should be connected to the output inductor. These pins are connected to the source of
the high side N channel MOSFET.
This pin is used to set boost mode and monitor the battery voltage that is the input of the boost converter. After VCC POR, the
controller will detect the voltage on this pin, if voltage on this pin is below 200mV, the controller is set in
synchronous/non-synchronous buck mode and latch in this state unless VCC is below the POR falling threshold; if the voltage
on this pin after VCC POR is above 200mV, the controller is set in boost mode and latch in this state.
In boost mode, this pin is used to monitor input voltage through a resistor divider. By setting the resistor divider, the high
threshold and hysteresis can be programmed. When voltage on this pin is above 0.8V , the PWM output (LGATE) for the boost
converter is disabled, and when voltage on this pin is below 0.8V minus the hysteresis, the boost PWM is enabled.
In boost mode operation, PFM is disabled when boost PWM is enabled. Check Boost Mode Operation in the “Functional
Description” on page 13 for more details.
This pin can be used to synchronize two or more ISL78200 controllers. Multiple ISL78200 can be synchronized with their SYNC
pins connected together. 180 degree phase shift is automatically generated between the master and slave ICs.
The internal oscillator can also lock to an external frequency source applied on this pin with square pulse waveform (with
frequency 10% higher than the IC’s local frequency, and pulse width higher than 150ns).
This pin should be left floating if not used. Range: 0V to 5.5V.
In synchronous buck mode, this pin is used to drive the lower side MOSFET to improve efficiency.
In non-synchronous buck when a diode is used as the bottom side power device, this pin should be connected to VCC before
VCC start-up to have low side driver (LGATE) disabled.
In boost mode, it can be used to drive the boost power MOSFET. The boost control PWM is the same with the buck control PWM.
Bottom thermal pad. It is not connected to any electrical potential of the IC. In layout it must be connected to PCB ground
copper plane with an area as large as possible to effectively reduce the thermal impedance.
Ordering Information
PART
NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL78200AVEZ
ISL78200 AVEZ
-40 to +105
20 Ld HTSSOP
MDP0048
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL78200. For more information on MSL please see techbrief TB363.
3 FN7641.0
September 22, 2011
Datasheet pdf - http://www.DataSheet4U.net/


3Pages


ISL78200 電子部品, 半導体
www.DataSheet.co.kr
ISL78200
Absolute Maximum Ratings
VIN, PHASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +44V
VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +6.0V
AUXVCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +22V
Absolute Boot Voltage, VBOOT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +50.0V
Upper Driver Supply Voltage, VBOOT - VPHASE. . . . . . . . . . . . . . . . . . . +6.0V
All Other Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to VCC + 0.3V
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000V
Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250V
Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000V
Latchup Rating (Tested per JESD78B; Class II, Level A) . . . . . . . . . 100mA
Thermal Information
Thermal Resistance
θJA (°C/W) θJC (°C/W)
HTSSOP Package (Notes 4, 5) . . . . . . . . . . . . . . .
35
3.5
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range. . . . . . . . . . . . . . . . . -65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Supply Voltage on VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 40V
AUXVCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +20V
Ambient Temperature Range (Automotive). . . . . . . . . . . . . . .-40°C to +105°C
Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief TB379.
5. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications Refer to the Block Diagram (page 4) and Typical Application Schematics (page 5). Operating conditions
unless otherwise noted: VIN = 12V, or VCC = 4.5V, TA = -40°C to +105°C. Typicals are at TA = +25°C.
Boldface limits apply over the operating temperature range, -40°C to +105°C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN MAX
(Note 6) TYP (Note 6) UNITS
VIN SUPPLY
VIN Pin Voltage Range
Operating Supply Current
VIN Pin
3.05
40 V
VIN connected to VCC
3.05
5.5 V
IQ MODE = VCC/FLOATING (PFM), no load at the
output
300
µA
MODE = GND (Forced PWM), VIN = 12V,
non-switching
1.2 mA
Standby Supply Current
INTERNAL MAIN LINEAR REGULATOR
IQ_SBY
EN connected to GND, VIN = 12V
1.8 3 µA
MAIN LDO VCC Voltage
MAIN LDO Dropout Voltage
VCC Current Limit of MAIN LDO
INTERNAL AUXILIARY LINEAR REGULATOR
VCC
VDROPOUT_MAIN
VIN > 5V
VIN = 4.2V, IVCC = 35mA
VIN = 3V, IVCC = 25mA
4.2 4.5 4.8
0.3 0.5
0.25 0.3
60
V
V
V
mA
AUXVCC Input Voltage Range
AUX LDO VCC Voltage
LDO Dropout Voltage
Current Limit of AUX LDO
VAUXVCC
VCC
VDROPOUT_AUX
VAUXVCC > 5V
VAUXVCC = 4.2V, IVCC = 35mA
VAUXVCC = 3V, IVCC = 25mA
3 20
4.2 4.5 4.8
0.3 0.5
0.25 0.3
60
V
V
V
V
mA
AUX LDO Switch-over Rising Threshold
AUX LDO Switch-over Falling Threshold
VAUXVCC_RISE
VAUXVCC_FALL
AUXVCC voltage rise, switch to auxiliary LDO
AUXVCC voltage fall, switch back to main
BIAS LDO
2.97 3.1 3.2
2.73 2.87 2.97
V
V
AUX LDO Switch-over Hysteresis
VAUXVCC_HYS AUXVCC switch-over hysteresis
0.2 V
6 FN7641.0
September 22, 2011
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共有リンク

Link :


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