Bay Linear, Inc 2418Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
Dual-Channel Power Distribution Switch B2025/2076
Advance Information
Package Information Ordering Information
Package Enable
Active High Active Low
SO-8 B2026-1M B2026-2M
SO-8 B2076-1M B2076-2M
8 DIP B2026-1P B2026-2P
8 DIP B2076-1P B2076-2P
Description
The Bay Linear B2026 & B2076 are a dual high-side power
switch recommended for general Propose self-powered and
bus-powdered universal serial for bus (USB) application
conforming to USB requirements. These devices include
thermal shutdown which in fault modes reduces the current
consumptions.
Additional features such as thermal shutdown to prevent
catastrophic switch failure from excessively high current
loads, under voltage lockout (UVLO) to ensure that the device
remains off unless there is a valid input voltage present. These
device it includes internal current limits. The 2026/76 offer a
soft-start circuit for limit the inrush current and Fault status
output flag for time over current and thermal shutdown status.
Bay Linear B2026/76 are available in 8-pin Dip and 8-pin
SOIC packages.
Features
• 2.7V to 5.5V Input
• Under voltage Lockout
• 1µ
µµ
µA Typical off-State Supply Current
• 500mA Minimum Continuous Load Current
• B2076 with Circuit Breaker Mode
• Logic Compatible Input
• Thermal Shutdo wn & Short Circuit protection
• Pin Compatible with B2526
• Replacement for MIC2026/76
Applications
• USB Host and self-Powered Hubs
• USB Power Management
• Battery-Charger Circuits
• Hot Plug - In P ower Supplies
• Bus-Powered Hubs
• Notebooks/PDA
• ACPI power distribution
Bay Linear
Bay LinearBay Linear
Bay Linear
Inspire the Linear Power
Inspire the Linear PowerInspire the Linear Power
Inspire the Linear Power
Logic
Charge
Pump
Logic
Charge
Pump
8 Out (A)
7 IN
5 Out (B)
6 GND
EN (A) 1
FLG (A) 2
FLB (B) 3
EN (B) 4
Top View
2
1
3
4
8
7
6
5
BAY
B2026/76
FLAG (B)
EN (B)
VOUT (A)
GND
VIN
FLAG (A)
EN (A)
SO-8/8-DIP
V
OUT (B)
Top View
2
1
3
4
8
7
6
5
BAY
B2026/76
FLAG (B)
EN (B)
VOUT (A)
GND
VIN
FLAG (A)
EN (A)
SO-8/8-DIP
V
OUT (B)
Bay Linear, Inc 2418Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
B2026/76
ABSOLUTE MAXIMUM RATINGS OPERATING RATING
Supply Voltage…………………………………..+.6V Supply Voltage...............................................+2.7V to +5.5V
Fault Flag Voltage……………………………….+.6V Ambient Operating Temperature.................... -40°C to +85°C
Fault Flag Current……………………………..25mA
Output Voltage……………………………………6V
Output Current……………………Internally Limited
Enable Input……………………………-0.3V to +3V
Storage Temperature………………-65°C to +150°C
Lead Temperature (Soldering 5 sec.)………….260°C
Thermal Resistance
SOIC.................................................................. 160°C/W
DIP..................................................................... 105°C/W
ELECTRICAL CHARACTERISTICS at VIN = 5V, Ta=25°C, unless otherwise specified. (Note 1)
Parameters
Conditions Typ Min Max Units
Supply Current Switch Off, OUT = Open VENA=VEMB≤0.8V
Switch Off, OUT = Open VENA=VEMB≥2.4V
Switch On, OUT = Open VENA=VEMB≤0.8V
Switch On, OUT = Open VENA=VEMB ≥2.4V
0.75
0.75
100
100
5
5
160
160
µA
Enable Input Threshold Low to High Transition
High to Low Transition, (Note1)
1.7
1.45
0.8 2.4 V
Enable Input Current VEN = 0V to 5.5V ± 0.01 -1 1 µA
Enable Input Capacitance 1 pF
Switch Resistance VIN = 5V IOUT = 500mA, Each Switch
VIN = 3.3V IOUT = 500mA, Each Switch
90
100 140
170 mΩ
Output Turn-On Delay RL = 10Ω, CL=1µf 1.3 5 ms
Output Turn-On Rise Time RL = 10Ω, CL=1µf 1.15 4.9 ms
Output Turn-Off Delay RL = 10Ω, CL=1µf 35 100
µs
Output Turn-Off Fall Time RL = 10Ω, CL=1µf 32 100
µs
Output Leakage Current Each output (output disabled) 10
µA
Continuous Load Current Each output 0.5 A
Short Circuit Current Limit Each output (enable into load), VOUT = 0V 0.9 0.5 1.25 A
Current Limit Threshold Ramped Load applied to enable output, VOUT ≤ 4.0V 1.0 1.25 A
Over current Flag Response Delay VIN=5V, apply VOUT=0V UNTIL FLAG LOW
VIN=3.3V, apply VOUT=0V UNTIL FLAG LOW
3.0
3.0
1.5
7.0
ms
Short Circuit Response Time VOUT=0V to IOUT=ILIMIT 20 µs
Error Flag Off Current VFLAG = 5V 0.01 1
µA
UVLO Threshold VIN = Increasing
VIN = Decreasing
2.4
2.15
2.2
2.15
2.7
2.5 V
Bay Linear, Inc 2418Armstrong St., Livermore CA USA 9550 Tel: (925) 606-5950, Fax: (925) 940-9556 www.baylinear.com
Advance Information- These data sheets contain descriptions of products that are in development. The specifications are based on the engineering calculations, computer simulations and/
or initial prototype evaluation.
Preliminary Information- These data sheets contain minimum and maximum specifications that are based on the initial device characterizations. These limits are subject to change upon the
completion of the full characterization over the specified temperature and supply voltage ranges.
The application circuit examples are only to explain the representative applications of the devices and are not intended to guarantee any circuit design or permit any
industrial property right to other rights to execute. Bay Linear takes no responsibility for any problems related to any industrial property right resulting from the use of
the contents shown in the data book. Typical parameters can and do vary in different applications. Customer’s technical experts must validate all operating parameters
including “ Typical” for each customer application.
LIFE SUPPORT AND NUCLEAR POLICY
Bay Linear products are not authorized for and should not be used within life support systems which are intended for surgical implants
into the body to support or sustain life, in aircraft, space equipment, submarine, or nuclear facility applications without the specific
written consent of Bay Linear President.
