MICREL MIC2077-2BWM, MIC2077-2BM, MIC2077-1BM, MIC2027-1BM, MIC2027-1BWM Datasheet

MIC2027/2077 Micrel

MIC2027/2077

Quad USB Power Distribution Switch

Preliminary Information

General Description

The MIC2027 and MIC2077 are quad high-side MOSFET
switches optimized for general-purpose power distribution
requiring circuit protection. The MIC2027/77 are internally
current limited and have thermal shutdown that protects the
device and load.

The MIC2077 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 current limit faults
are internally filtered.

The MIC2027/77 is available in narrow (150 mil) and wide
(300 mil) SOP (small outline packages).

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 (MIC2077)

reduces power consumption

• Logic-compatible inputs

• Soft-start circuit

• Low quiescent current

Pin-compatible with MIC2524 and MIC2527

Applications

• USB peripherals

• General purpose power switching

• ACPI power distribution

• Notebook PCs

• PDAs

• PC card hot swap

Typical Application

5V ± 3%

MIC5203-3.3

LDO Regulator

IN OUT

4.7
µF

GND

Bold lines indicate

0.1" wide, 1-oz. copper
high-current traces.

* 33µF, 16V tantalum or 100µF, 10V electrolytic per port

1µF

10k

V+

D+
D–

ON/OFF

OVERCURRENT

GND

MIC20273.3V USB Controller

ENA
FLGA IN
ENB OUTA
FLGB
ENC

END
FLGD GND

IN

OUTB
OUTC
OUTDFLGC

GND

4-Port Self-Powered Hub

33µF*

0.1
µF

33µF*

33µF*

33µF*

Ferrite

Bead

0.01µF

0.01µF

0.01µF

0.01µF

V

BUS

D+

D–

GND

V

BUS

D+

D–

GND

V

BUS

D+

D–

GND

V

BUS

D+

D–

GND

Downstream

USB

Port 1

500mA max.

Downstream

USB

Port 2

500mA max.

Downstream

USB

Port 3

500mA max.

Downstream

USB

Port 4

500mA max.

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

June 2000 1 MIC2027/2077

MIC2027/2077 Micrel

Ordering Information

Part Number Enable Temperature Range Package

MIC2027-1BWM Active High –40°C to +85°C 16-lead wide SOP
MIC2027-1BM Active High –40°C to +85°C 16-lead SOP
MIC2027-2BWM Active Low –40°C to +85°C 16-lead wide SOP
MIC2027-2BM Active Low –40°C to +85°C 16-lead SOP
MIC2077-1BWM Active High –40°C to +85°C 16-lead wide SOP
MIC2077-1BM Active High –40°C to +85°C 16-lead SOP
MIC2077-2BWM Active Low –40°C to +85°C 16-lead wide SOP
MIC2077-2BM Active Low –40°C to +85°C 16-lead SOP

Pin Configuration

FLGA

OUTA

IN(C/D)

OUTC

FLGC

1

ENA

2
3

GND

4
5
6

ENC

7
8

16-Lead SOP (M)

16-Lead Wide SOP (WM)

16
15
14
13
12
11
10

9

FLGB
ENB
OUTB
IN(A/B)
GND
OUTD
END
FLGD

ENA 2

FLGA 1
ENB 15

FLGB 16

ENC 7

FLGC 8
END 10

FLGD 9

Functional Pinout

LOGIC,

CHARGE

PUMP

LOGIC,

CHARGE

PUMP

LOGIC,

CHARGE

PUMP

LOGIC,

CHARGE

PUMP

3 OUTA

13 IN(A/B)

14 OUTB

6 OUTC

5 IN(C/D)

11 OUTD

124 GND

MIC2027/2077 2 June 2000

MIC2027/2077 Micrel

Pin Description

Pin Number Pin Name Pin Function

1 FLGA Fault Flag A: (Output): Active-low, open-drain output. Low indicates

overcurrent or thermal shutdown conditions. Overcurrent conditions must
last longer than tD to assert flag.

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

active low (-2).

3 OUTA Switch A Output

4, 12 GND Ground

5 IN(C/D) Input: Channel C and D switch and logic supply input.
6 OUTC Switch C Output
7 ENC Switch C Enable (Input)
8 FLGC Fault Flag C (Output)

9 FLGD Fault Flag D (Output)
10 END Switch D Enable (Input)
11 OUTD Switch D Output
13 IN(A/B) Supply Input: Channel A and B switch and logic supply input.
14 OUTB Switch B Output
15 ENB Switch B Enable (Input)
16 FLGB Fault Flag B (Output)

Absolute Maximum Ratings (Note 1)

Supply Voltage (VIN) ...................................... –0.3V to +6V

Fault Flag Voltage (V
Fault Flag Current (I
Output Voltage (V
Output Current (I

OUT

Enable Input (IEN).................................... –0.3V to VIN + 3V

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

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

FLG

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

FLG

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

OUT

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

Operating Ratings (Note 2)

Supply Voltage (VIN) ................................... +2.7V to +5.5V

Ambient Temperature (TA).........................–40°C to +85°C

Junction Temperature Range (TJ) ........... Internally Limited

Thermal Resistance

[300 mil] Wide SOP (θJA) ..................................120°C/W

[150 mil] SOP (θJA) ...........................................112°C/W

DIP(θJA).............................................................130°C/W

Lead Temperature (soldering 5 sec.) ........................ 260°C

ESD Rating, Note 3 ......................................................1kV

June 2000 3 MIC2027/2077

MIC2027/2077 Micrel

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 MIC20x7-1, V

(switch off), OUT = open
MIC20x7-2, V

(switch off), OUT = open
MIC20x7-1, V

(switch on), OUT = open
MIC20x7-2, V

(switch on), OUT = open

≤ 0.8V 1.5 10 µA

ENA–D

≥ 2.4V 1.5 10 µA

ENA–D

≥ 2.4V 200 320 µA

ENA–D

≤ 0.8V 200 320 µA

ENA–D

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 MIC20x7-1, V

MIC20x7-2, V

= 500mA 100 150 mΩ

OUT

= 500mA 110 170 mΩ

OUT

≤ 0.8V; 10 µA

ENx

≥ 2.4V, (output off)

ENx

Output Current in MIC2077 (per Latch Output) 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 3 ms

OUT

Undervoltage Lockout VIN rising 2.2 2.4 2.7 V
Threshold

VIN falling 2.0 2.15 2.5 V
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. Human body model, 1.5k in series with 100pF.
Note 4. If there is an output current limit fault on one channel, that channel will shut down when the die reaches approximately 140°C. If the die

reaches approximately 160°C, the other channel driven by the same input will shut down, even if neither channel is in current limit.

MIC2027/2077 4 June 2000

MIC2027/2077 Micrel

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 (MIC20x7-2)

V

EN

V

OUT

50%

t

OFF

t

ON

90%

10%

Active-High Switch Delay Times (MIC20x7-1)

June 2000 5 MIC2027/2077