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参数资料
| 型号： | ISL8105BCRZ-T |
| 厂商： | Intersil |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 10-DFN |
| 标准包装： | 6,000 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 330kHz |
| 占空比： | 100% |
| 电源电压： | 6.5 V ~ 14.4 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
ISL8105B
Electrical Specifications
Recommended Operating Conditions, Unless Otherwise Noted. Parameters with MIN and/or MAX limits are
100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are
not production tested. (Continued)
PARAMETER
TGATE Sink Resistance
BGATE Source Resistance
BGATE Source Resistance
BGATE Sink Resistance
BGATE Sink Resistance
SYMBOL
R TG-SNKl
R BG-SRCh
R BG-SRCl
R BG-SNKh
R BG-SNKl
TEST CONDITIONS
V BIAS = 4.25V, 50mA Source Current
V BIAS = 14.5V, 50mA Source Current
V BIAS = 4.25V, 50mA Source Current
V BIAS = 14.5V, 50mA Source Current
V BIAS = 4.25V, 50mA Source Current
MIN
TYP
2.7
2.4
2.75
2.0
2.1
MAX
UNITS
Ω
Ω
Ω
Ω
Ω
OVERCURRENT PROTECTION (OCP)
BSOC Current Source
I BSOC
ISL8105BC; BGATE/BSOC Disabled
ISL8105BI; BGATE/BSOC Disabled
19.5
18.0
21.5
21.5
23.5
23.5
μA
μA
NOTE:
3. Limits established by characterization and are not production tested.
Functional Pin Description (SOIC, DFN)
BOOT (SOIC Pin 1, DFN Pin 1)
This pin provides ground referenced bias voltage to the
top-side MOSFET driver. A bootstrap circuit is used to create
a voltage suitable to drive an N-Channel MOSFET (equal to
V BIAS minus the on-chip BOOT diode voltage drop), with
respect to LX.
TGATE (SOIC Pin 2, DFN Pin 2)
Connect this pin to the gate of top-side MOSFET; it provides
the PWM-controlled gate drive. It is also monitored by the
adaptive shoot-through protection circuitry to determine
when the top-side MOSFET has turned off.
GND (SOIC Pin 3, DFN Pin 4)
This pin represents the signal and power ground for the IC.
Tie this pin to the ground island/plane through the lowest
impedance connection available.
BGATE/BSOC (SOIC Pin 4, DFN Pin 5)
Connect this pin to the gate of the bottom-side MOSFET; it
provides the PWM-controlled gate drive (from V BIAS ). This
pin is also monitored by the adaptive shoot-through
protection circuitry to determine when the lower MOSFET
has turned off.
During a short period of time following Power-On Reset
(POR) or shut-down release, this pin is also used to
determine the current limit threshold of the converter.
Connect a resistor (R BSOC ) from this pin to GND. See
overcurrent trip cycles the soft-start function, after two
dummy soft-start time-outs. Some of the text describing the
BGATE function may leave off the BSOC part of the name,
when it is not relevant to the discussion.
VBIAS (SOIC Pin 5, DFN Pin 6)
This pin provides the bias supply for the ISL8105B, as well
as the bottom-side MOSFET's gate and the BOOT voltage
5
for the top-side MOSFET's gate. An internal 5V regulator will
supply bias if V BIAS rises above 6.5V (but the BGATE/BSOC
and BOOT will still be sourced by V BIAS ). Connect a well
decoupled +5V or +12V supply to this pin.
FB (SOIC Pin 6, DFN Pin 8)
This pin is the inverting input of the internal error amplifier.
Use FB, in combination with the COMP/EN pin, to
compensate the voltage-control feedback loop of the
converter. A resistor divider from the output to GND is used
to set the regulation voltage.
COMP/EN (SOIC Pin 7, DFN Pin 9)
This is a multiplexed pin. During soft-start and normal converter
operation, this pin represents the output of the error amplifier.
Use COMP/EN, in combination with the FB pin, to compensate
the voltage-control feedback loop of the converter.
Pulling COMP/EN low (V DISABLE = 0.4V nominal) will
disable (shut-down) the controller, which causes the
oscillator to stop, the BGATE and TGATE outputs to be held
low, and the soft-start circuitry to re-arm. The external
pull-down device will initially need to overcome maximum of
5mA of COMP/EN output current. However, once the IC is
disabled, the COMP output will also be disabled, so only a
20μA current source will continue to draw current.
When the pull-down device is released, the COMP/EN pin
will start to rise at a rate determined by the 20μA charging up
the capacitance on the COMP/EN pin. When the COMP/EN
pin rises above the V DISABLE trip point, the ISL8105B will
begin a new initialization and soft-start cycle.
LX (SOIC Pin 8, DFN Pin 10)
Connect this pin to the source of the top-side MOSFET and
the drain of the bottom-side MOSFET. It is used as the sink
for the TGATE driver and to monitor the voltage drop across
the bottom-side MOSFET for overcurrent protection. This pin
is also monitored by the adaptive shoot-through protection
FN6447.2
April 15, 2010
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相关代理商/技术参数 |
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| ISL8105BEVAL1Z | 功能描述:EVAL BOARD ISL8105B RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL8105BEVAL2Z | 功能描述:EVALUATION BOARD FOR ISL8105B RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL8105BIBZ | 功能描述:IC REG CTRLR BUCK PWM VM 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL8105BIBZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 8-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL8105BIRZ | 功能描述:IC REG CTRLR BUCK PWM VM 10-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
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