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부품번호 | AIC1521-1CS 기능 |
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기능 | Single High-Side Power Switch With Control Function | ||
제조업체 | Analog Intergrations Corporation | ||
로고 | |||
AIC1521
Single High-Side Power Switch With Control
Function
n FEATURES
• 120mΩ (5V Input) High-Side MOSFET Switch.
l 500mA Continuous Load Current.
l 80µA Typical On-State Supply Current.
l 1µA Typical Off-State Supply Current.
l Current-Limit / Short Circuit Protection.
l Thermal Limiting Protection under Overcurrent
Condition.
l Undervoltage Lockout Ensures that Switch is off at
Start Up.
l Output can be Forced Higher than Input (Off-State).
l Slow Turn ON and Fast Turn OFF.
l Active-High or Active-Low Enable.
n APPLICATIONS
l Motherboard USB Management.
l USB Power Management.
l Hot Plug-In Power Supplies.
l Battery-Charger Circuit.
l Power Distribution Switch.
n TYPICAL APPLICATION
CIRCUIT
n DESCRIPTION
The AIC1521 is an integrated high-side power
switch for self-powered and bus-powered Universal
Serial Bus (USB) applications. The high-side
switch is a MOSFET with 120mΩ RDS(ON), which
meets USB voltage drop requirements for
maximum transmission wire length. The switch
ON/OFF is controlled by CTL pin.
Output current is typically limited to 1.0A, well
below the 5A safety requirement, and thermal
shutdown function shuts the switch off to prevent
damage under overcurrent conditions.
Guaranteed minimum output rise time limits
inrush current during hot plug-in, minimizing EMI
and preventing the voltage at upstream port from
dropping excessively.
VCC
5.0V
+
33µ F
AIC1521-0
IN OUT
0.1µF
CTL
GND
+
*33µ F
Ferrite Bead
0 .01µ F
VBUS
D+
D-
GND
*33µF, 16V Tantalum, or
100µF, 10V Electrolytic
Bold line indicate high-current traces
USB High-Side Power Switch
DATA
Analog Integrations Corporation
www.analog.com.tw
DS-1520-00 Aug 18, 00
TEL: 886-3-5772500
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
FAX: 886-3-5772510
1
AIC1521
n TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Off-State Supply Current vs. Supply Voltage
12.0
Off-State Supply Current vs. Temperature
20
11.5 18
11.0
10.5
10.0
9.5
16
14
12
10
8
9.0 6
8.5
8.0
3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
Supply Voltage (V)
4
2
0
-40 -20
0
20 40 60 80 100
Temperature (°C)
Output On Resistance vs. Supply Voltage
130
125
120
115
110
105
1003.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5
Supply Voltage (V)
Output On Resistance vs. Temperature
150
140
130
120
110
100
90
80
-40
-20
0 20 40 60
Temperature (°C)
80 100
UVLO Threshold Voltage vs. Temperature
3.0
2.9
Rising
2.8
2.7
Falling
2.6
2.5
2.4
-40
-20
0 20 40 60
Temperature (°C)
80 100
Current Limit Threshold vs. Temperature
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80 -40 -20
0 20 40 60
Temperature (°C)
80 100
4
4페이지 AIC1521
n PIN DESCRIPTION
MSOP8, SO8
PIN 1/4/6/8: NC:
PIN 2: CTL
- TTL compatible control input. It
controls the power switch turn-
on/turn-off. Active High for
AIC1521-1 and active low for
AIC1521-0.
PIN 3: IN-
Power supply input.
PIN 4: GND- Chip power ground.
PN 7: OUT- MOSFET switch output.
SOT89-5
PIN 1: IN
PIN 2: GND
PIN 3: OUT
PIN 4: NC
PIN 5: CTL
- Power supply input.
- Chip power ground.
- MOSFET switch output.
- TTL compatible control input. It
controls the power switch turn-
on/turn-off. Active High for
AIC1521-1 and active low for
AIC1521-0.
n APPLICATION INFORMATIONS
l Current Limit
l The current limit threshold is preset internally. It
protects the output MOSFET switches from
damage due to undesirable short circuit
conditions or excess inrush current often
encountered during hot plug-in. The AIC1521
allows minimum 500mA continuous load current
per Channel.
l Thermal Protection
When the chip temperature exceeds 110°C, the
thermal protection function works.
l Supply Filtering
A 0.1uF to 1uF bypass capacitor from IN to GND,
located near the device, is strongly recommended
to control supply transients. Without a bypass
capacitor, an output short may cause sufficient
ringing on the input (from supply lead inductance) to
damage internal control circuitry.
l Transient Droop Requirements
USB support dynamic attachment (hot plug-in) of
peripherals. A current surge is caused by the input
capacitance of downstream device. Ferrite beads
are recommended in series with all power and
ground connector pins. Ferrite beads reduce EMI
and limit the inrush current during hot-attachment
by filtering high-frequency signals.
l Short Circuit Transient
Bulk capacitance provides the short-term transient
current needed during a hot-attachment event. With
a 33uF, 16V tantalum or 100uF, 10V electrolytic
capacitor mounted close to downstream connector
should provide transient drop protection.
l Printed Circuit Layout
The power circuitry of USB printed circuit boards
requires a customized layout to maximize thermal
dissipation and to minimize voltage drop and EMI.
7
7페이지 | |||
구 성 | 총 9 페이지수 | ||
다운로드 | [ AIC1521-1CS.PDF 데이터시트 ] |
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부품번호 | 상세설명 및 기능 | 제조사 |
AIC1521-1CO | Single High-Side Power Switch With Control Function | Analog Intergrations Corporation |
AIC1521-1CS | Single High-Side Power Switch With Control Function | Analog Intergrations Corporation |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |