MICREL MIC2076-1BN, MIC2076-2BM, MIC2076-2BN, MIC2076-1BM, MIC2026-2BN Datasheet

MIC2026/2076 Micrel

MIC2026/2076

Dual-Channel Power Distribution Switch

Preliminary Information

General Description

The MIC2026 and MIC2076 are high-side MOSFET switches
optimized for general-purpose power distribution requiring
circuit protection.

The MIC2026/76 are internally current limited and have
thermal shutdown that protects the device and load.

The MIC2076 offers “smart” thermal shutdown that reduces
current consumption in fault modes. When a thermal shut­down fault occurs, the output is latched off until the faulty load
is removed. Removing the load or toggling the enable input
will reset the device output.

Both devices employ soft-start circuitry that minimizes inrush
current in applications where highly capacitive loads are
employed.

A fault status output flag is asserted during overcurrent and
thermal shutdown conditions. Transient faults are internally
filtered.

The MIC2026/76 are available in 8-pin DIP or 8-lead SOP.

Features

• 140mΩ maximum on-resistance per channel

• 2.7V to 5.5V operating range

• 500mA minimum continuous current per channel

• Short-circuit protection with thermal shutdown

• Thermally isolated channels

• Fault status flag with 3ms filter

eliminates false assertions

• Undervoltage lockout

• Reverse current flow blocking (no “body diode”)

• Circuit breaker mode (MIC2076)

• Logic-compatible inputs

• Soft-start circuit

• Low quiescent current

Pin-compatible with MIC2526

Applications

• USB peripherals

• General purpose power switching

• ACPI power distribution

• Notebook PCs

• PDAs

• PC card hot swap

Typical Application

V

CONT.

Logic Controller

VIN

OVERCURRENT
OVERCURRENT

10k
10k

ON/OFF

ON/OFF

MIC2026-2

ENA OUTA
FLGA IN
FLGB GND
ENB OUTB

V

CC

2.7V to 5.5V

0.1µF

Load

Load

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com

March 2000 1 MIC2026/2076

MIC2026/2076 Micrel

Ordering Information

Part Number Enable Temperature Range Package

MIC2026-1BM Active High –40°C to +85°C 8-lead SOP
MIC2026-2BM Active Low –40°C to +85°C 8-lead SOP
MIC2026-1BN Active High –40°C to +85°C 8-pin DIP
MIC2026-2BN Active Low –40°C to +85°C 8-pin DIP
MIC2076-1BM Active High –40°C to +85°C 8-lead SOP
MIC2076-2BM Active Low –40°C to +85°C 8-lead SOP
MIC2076-1BN Active High –40°C to +85°C 8-pin DIP
MIC2076-2BN Active Low –40°C to +85°C 8-pin DIP

Pin Configuration

ENA
FLGA
FLGB

ENB

Pin Description

Pin Number Pin Name Pin Function

1 ENA Switch A Enable (Input): Logic-compatible enable input. Active high (-1) or

2 FLGA Fault Flag A (Output): Active-low, open-drain output. Indicates overcurrent

3 FLGB Fault Flag B (Output): Active-low, open-drain output. Low indicates

4 ENB Switch B Enable (Input): Logic-compatible enable input. Active-high (-1) or

5 OUTB Switch B (Output)
6 GND Ground
7 IN Input: Switch and logic supply input.
8 OUTA Switch A (Output)

MIC2026/76

1
2
3
4

8
7
6
5

OUTA
IN
GND
OUTB

8-Lead SOP (BM)

8-Pin DIP (BN)

active low (-2).

or thermal shutdown conditions. Overcurrent conditions must last longer
than tD in order to assert FLGA.

overcurrent or thermal shutdown conditions.Overcurrent conditions must last
longer than tD in order to assert FLGB.

active-low (-2).

MIC2026/2076 2 March 2000

MIC2026/2076 Micrel

Absolute Maximum Ratings (Note 1)

Supply Voltage (V
Fault Flag Voltage (V
Fault Flag Current (I
Output Voltage (V
Output Current (I
Enable Input (I

) ...................................... –0.3V to +6V

IN

)..............................................+6V

FLG

) ............................................25mA

FLG

) ..................................................+6V

OUT

)...............................Internally Limited

OUT

)....................................–0.3V to VIN + 3V

EN

Operating Ratings (Note 2)

Supply Voltage (V
Ambient Temperature (T
Junction Temperature Range (T
Thermal Resistance

SOP (θJA) ..........................................................160°C/W

DIP(θJA).............................................................105°C/W

) ................................... +2.7V to +5.5V

IN

).........................–40°C to +85°C

A

) ........... Internally Limited

J

Storage Temperature (TS) ...................... –65°C to +150 °C

ESD Rating, Note 3

Electrical Characteristics

VIN = +5V; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C; unless noted
Symbol Parameter Condition Min Typ Max Units

I

DD

V

EN

I

EN

R

DS(on)

t

ON

t

R

t

OFF

t

F

I

LIMIT

t

D

Supply Current MIC20x6-1, V

(switch off), OUT = open
MIC20x6-2, V

(switch off), OUT = open
MIC20x6-1, V

(switch on), OUT = open
MIC20x6-2, V

(switch on), OUT = open

ENA

ENA

ENA

ENA

= V

= V

= V

= V

≤ 0.8V 0.75 5 µA

ENB

≥ 2.4V 0.75 5 µA

ENB

≥ 2.4V 100 160 µA

ENB

≤ 0.8V 100 160 µA

ENB

Enable Input Threshold low-to-high transition 1.7 2.4 V

high-to-low transition 0.8 1.45 V
Enable Input Hysteresis 250 mV
Enable Input Current V

= 0V to 5.5V –1 0.01 1 µA

EN

Enable Input Capacitance 1 pF
Switch Resistance VIN = 5V, I

VIN = 3.3V, I
Output Leakage Current MIC20x6-1, V

MIC20x6-1, V

= 500mA 90 140 mΩ

OUT

= 500mA 100 160 mΩ

OUT

≤ 0.8V; 10 µA

ENx

≥ 2.4V, (output off)

ENx

OFF Current in MIC2076 50 µA
Latched Thermal Shutdown (during thermal shutdown state)

Output Turn-On Delay RL = 10Ω, CL = 1µF, see “Timing Diagrams” 1.3 5 ms
Output Turn-On Rise Time RL = 10Ω, CL = 1µF, see “Timing Diagrams” 1.15 4.9 ms
Output Turnoff Delay RL = 10Ω, CL = 1µF, see “Timing Diagrams” 35 100 µs
Output Turnoff Fall Time RL = 10Ω, CL = 1µF, see “Timing Diagrams” 32 100 µs
Short-Circuit Output Current V

= 0V, enabled into short-circuit 0.5 0.9 1.25 A

OUT

Current-Limit Threshold ramped load applied to output 1.0 1.25 A
Short-Circuit Response Time V

OUT

= 0V to I

OUT

= I

LIMIT

20 µs

(short applied to output)
Overcurrent Flag Response VIN = 5V, apply V

Delay

VIN = 3.3V, apply V

= 0V until FLG low 1.5 3 7 ms

OUT

= 0V until FLG low TBD 3 ms

OUT

Undervoltage Lockout VIN rising 2.2 2.4 2.7 V
Threshold

VIN falling 2.0 2.15 2.5 V

March 2000 3 MIC2026/2076

MIC2026/2076 Micrel

Symbol Parameter Condition Min Typ Max Units

Error Flag Output IL = 10mA, VIN = 5V 10 25 Ω
Resistance

Error Flag Off Current V
Overtemperature Threshold T

Note 4

IL = 10mA, VIN = 3.3V 15 40 Ω

= 5V 10 µA

FLAG

increasing, each switch 140 °C

J

TJ decreasing, each switch 120 °C
T

increasing, both switches 160 °C

J

TJ decreasing, both switches 150 °C

Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended.
Note 4. If there is a fault on one channel, that channel will shut down when the die reaches approximately 140°C. If the die reaches approximately

160°C, both channels will shut down, even if neither channel is in current limit.

Test Circuit

V

Device
Under
Test

OUT

C

R

L

L

OUT

Timing Diagrams

t

R

V

OUT

90%

10%

90%

10%

t

F

Output Rise and Fall Times

V

EN

V

OUT

50%

t

OFF

t

ON

90%

10%

Active-Low Switch Delay Times (MIC20x6-2)

V

EN

50%

t

OFF

t

ON

V

OUT

90%

10%

Active-High Switch Delay Times (MIC20x6-1)

MIC2026/2076 4 March 2000

MIC2026/2076 Micrel

0

1

2

3

4

5

-40 -20 0 20 40 60 80 100

RISE TIME (ms)

TEMPERATURE (°C)

Turn-On Rise Time

vs. Temperature

RL=10Ω
C

L

=1µF

VIN = 5V

VIN = 3.3V

0

0.5

1.0

1.5

2.0

2.5

2.5 3.0 3.5 4.0 4.5 5.0 5.5

RISE TIME (ms)

INPUT VOLTAGE (V)

Turn-On Rise Time

vs. Input Voltage

RL=10Ω
C

L

=1µF

+85°C

+25°C

-40°C

0

100

200

300

400

-40 -20 0 20 40 60 80 100

FALL TIME (µs)

TEMPERATURE (°C)

Fall Time

vs. Temperature

RL=10Ω
C

L

=1µF

VIN = 3.3V

0

50

100

150

200

250

300

2.5 3.0 3.5 4.0 4.5 5.0 5.5

RISE TIME (µs)

INPUT VOLTAGE (V)

Fall Time

vs. Input Voltage

TA = 25°C

C

L

= 1µF

R

L

= 10Ω

Supply On-Current

180
160
140
120
100

CURRENT (µA)

vs. Temperature

5V

80

3.3V

60
40
20

0

-40 -20 0 20 40 60 80 100

TEMPERATURE (°C)

Supply On-Current

vs. Input Voltage

200

150

100

CURRENT (µA)

+85°C

50

0

2.5 3.0 3.5 4.0 4.5 5.0 5.5

INPUT VOLTAGE (V)

-40°C

+25°C

On-Resistance

160
140
120
100

ON-RESISTANCE (mΩ)

vs. Temperature

3.3V

I

OUT

5V

= 500mA

80
60
40
20

0

-40 -20 0 20 40 60 80 100

TEMPERATURE (°C)

On-Resistance

200

150

100

RESISTANCE (mΩ)

vs. Input Voltage

+85°C
+25°C

50

0

2.5 3.0 3.5 4.0 4.5 5.0 5.5

-40°C

I

= 500mA

OUT

INPUT VOLTAGE (V)

CURRENT LIMIT (mA)

March 2000 5 MIC2026/2076

Short-Circuit Current-Limit

1000

800

600

400

200

vs. Temperature

VIN = 3.3V

VIN = 5V

0

-40 -20 0 20 40 60 80 100

TEMPERATURE (°C)

Short-Circuit Current-Limit

vs. Input Voltage

800
700
600
500
400
300
200

CURRENT LIMIT (mA)

100

0

2.5 3.0 3.5 4.0 4.5 5.0 5.5

+25°C

+85°C

INPUT VOLTAGE (V)

-40°C

Current-Limit Threshold

1200

1000

800

600

400

200

CURRENT LIMIT THRESHOLD (mA)

vs. Temperature

VIN = 5V

VIN = 3.3V

0

-40 -20 0 20 40 60 80 100

TEMPERATURE (°C)

Current-Limit Threshold

1200

1000

800

600

400

200

CURRENT LIMIT THRESHOLD (mA)

vs. Input Voltage

+25°C

+85°C

0

2.5 3.0 3.5 4.0 4.5 5.0 5.5

INPUT VOLTAGE (V)

-40°C