MIC2601/2
1.2A, 1.2MHz/2MHz Wide Input Range
Integrated Switch Boost Regulator
General Description
The MIC2601/2 is a 1.2MHz/2MHz, PWM DC/DC boost
switching regulator available in a 2mm x 2mm MLF
®
package. High power density is achieved with the
MIC2601/2’s internal 40V/1.2A switch, allowing it to power
large loads in a tiny footprint.
The
MIC2601/2
implements
constant
frequency
1.2MHz/2MHz PWM current mode control. The MIC2601/2
offers internal compensation that provides excellent
transient response and output regulation performance. The
high frequency operation saves board space by allowing
small, low-profile external components. The fixed
frequency PWM scheme also reduces spurious switching
noise and ripple to the input power source.
Soft start reduces in rush current and is programmable via
external capacitor.
The MIC2601/2 is available in a 2mm x 2mm 8-pin MLF
®
leadless package. Both devices have an output over-
voltage protection feature.
The MIC2601/2 has an operating junction temperature
range of –40
°
C to +125
°
C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Wide input voltage range: 4.5V to 20V
Output voltage adjustable to 40V
1.2A switch current
MIC2601 operates at 1.2MHz
MIC2602 operates at 2MHz
Stable with small size ceramic capacitors
High efficiency
Programmable soft start
<10µA shutdown current
UVLO
Output over-voltage protection
Over temperature shutdown
8-pin 2mm x 2mm MLF
®
package
–40
°
C to +125
°
C junction temperature range
Applications
•
•
•
•
•
•
•
•
Multimedia STB/Antenna
Broadband communications
TFT-LCD bias supplies
Bias supply
Positive output regulators
SEPIC converters
DSL applications
Local boost regulators
___________________________________________________________________________________________________________
Typical Application
10µH
V
OUT
18V, 500mA
MIC2601/2
VIN
V
IN
= 12V
2.2µF
0.1µF
EN
SW
FB
0.1µF
10µF
6.65K
100
90
80
70
60
50
40
30
20
10
0
0 100 200 300 400 500 600 700 800
LOAD CURRENT (mA)
18V
OUT
Efficiency
8V
IN
12V
IN
VDD
SS
AGND PGND
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2009
M9999-090909-A
Micrel, Inc.
MIC2601/2
Ordering Information
Part Number
MIC2601YML
MIC2602YML
Notes
1.
2.
Overbar (
®
Marking
Code
(1)
RD1
RE1
Frequency
1.2MHz
2MHz
Output Over
Voltage Protection
40V
40V
Temperature Range
–40° to +125°C
–40° to +125°C
Package
(2)
Lead Finish
Pb-Free
Pb-Free
8-Pin 2mm x 2mm MLF
®
8-Pin 2mm x 2mm MLF
®
) symbol my not be to scale.
MLF is a GREEN RoHS compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
Pin Configuration
VIN
VDD
EN
AGND
1
2
3
4
8
7
6
5
PGND
SW
FB
SS
8-Pin 2mm x 2mm MLF
®
(ML)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
EP
Pin Name
VIN
VDD
EN
AGND
SS
FB
SW
PGND
GND
Pin Function
Supply (Input): 4.5V to 20V input voltage.
Internal regulator. VDD should be connected to VIN when VIN
≤
7V.
Enable (Input): Logic high enables regulator. Logic low shuts down regulator.
Analog Ground
Soft Start
Feedback (Input): 1.25V output voltage sense node. V
OUT
= 1.25V ( 1 + R1/R2)
Switch Node (Input): Internal power BIPOLAR collector.
Power ground
Ground (Return): Exposed backside pad. Internally fused to AGND and PGND
pins.
September 2009
2
M9999-090909-A
Micrel, Inc.
MIC2601/2
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .......................................................22V
Switch Voltage (V
SW
)....................................... –0.3V to 40V
Enable Voltage (V
EN
)......................................... –0.3V to V
IN
FB Voltage (V
FB
)...............................................................6V
Ambient Storage Temperature (T
s
) ...........–65°C to +150°C
Lead Temperature (soldering 10sec)......................... 260°C
ESD Rating..................................................................... 2kV
Operating Ratings
(2)
Supply Voltage (V
IN
).......................................... 4.5V to 20V
Enable Voltage (V
EN
)............................................ 0V to 20V
Junction Temperature (T
J
) ........................ –40°C to +125°C
Junction Thermal Resistance
2mm x 2mm MLF-8 (θ
JA
) ...................................90°C/W
2mm x 2mm MLF-8 (θ
JC
) ...................................45°C/W
Electrical Characteristics
(3)
T
A
= 25°C, V
IN
= V
EN
= 12V; unless otherwise noted.
Bold
values indicate –40°C
≤
T
J
≤
+125°C.
Symbol
V
IN
V
DD
V
ULVO
I
Q
I
SD
V
FB
I
FB
Parameter
Input Voltage Range
Internal Regulated Voltage
Under-voltage Lockout
Quiescent Current
Shutdown Current
Feedback Voltage
Feedback Input Current
Line Regulation
Load Regulation
SS
R
D
MAX
I
SW
V
SW
I
SW
V
EN
I
EN
f
SW
V
OVP
T
J
Notes:
1. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating
the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction temperature, T
J(Max)
, the
junction-to-ambient thermal resistance,
θ
JA
, and the ambient temperature, T
A
. The maximum allowable power dissipation will result in excessive die
temperature, and the regulator will go into thermal shutdown.
2. The device is not guaranteed to function outside its operating rating.
3. Specification for packaged product only.
4. Connect V
DD
pin to V
IN
pin when V
IN
≤
7V.
5. I
SD
= I
VIN
.
6. Guaranteed by design.
Condition
Note 4
For V
DD
V
FB
= 2V (not switching)
V
EN
= 0V,
Note 5
(±2%)
(±3%) (over temperature)
V
FB
= 1.25V
8V
≤
V
IN
≤
14V, V
OUT
= 18V
5mA
≤
I
OUT
≤
400mA, V
OUT
= 18V,
Note 6
MIC2601
MIC2602
Note 6
I
SW
= 1.2A
V
EN
= 0V, V
SW
= 18V
Turn ON
Turn OFF
V
EN
= 12V
Min
4.5
Typ
6.0
Max
20
Units
V
V
V
mA
µA
V
V
nA
%
%
kΩ
%
%
1.8
2.1
4.2
0.08
2.4
6
2
1.285
1.298
1.235
1.222
1.26
–550
0.04
0.1
15
1
Internal Soft Start Resistor
Maximum Duty Cycle
Switch Current Limit
Switch Saturation Voltage
Switch Leakage Current
Enable Threshold
Enable Pin Current
Oscillator Frequency (MIC2601)
Oscillator Frequency (MIC2602)
Output Over-voltage Protection
Over-temperature Threshold
Shutdown
15% Over programmed V
OUT
(rising)
Hysteresis
85
80
1.2
1.7
500
0.01
5
0.3
18.5
40
1.38
2.3
20
A
mV
µA
V
V
µA
MHz
MHz
%
°C
°C
1.5
1.02
1.7
10
1.12
1.92
15
150
10
September 2009
3
M9999-090909-A
Micrel, Inc.
MIC2601/2
Typical Characteristics
7
6
5
4
3
2
1
0
0
No Switching FB Pin @ 2V
Quiescent Current
vs. Input Voltage
4.5
4.4
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
Quiescent Current
vs. Temperature
91
90
89
88
87
86
Max Duty Cycle
vs. Input Voltage
246
81 01 21 41 61 8
INPUT VOLTAGE (V)
3.5
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
No Switching FB Pin @ 2V
85
46
EN = V
IN
81 01 21 41 61 82 0
INPUT VOLTAGE (V)
100
98
96
94
92
90
88
86
84
82
Max Duty Cycle
vs. Temperature
2700
2430
2160
1890
1620
1350
1080
810
540
270
Switch Saturation Voltage
vs. Input Voltage
–0.1A
–0.5A
–0.9A
–1.3A
–1.7A
–0.2A
–0.6A
–1.0A
–1.4A
–0.3A
–0.7A
–1.1A
–1.5A
–0.4A
–0.8A
–1.2A
–1.6A
2700
2430
2160
1890
1620
1350
1080
810
540
270
0
Switch Saturation Voltage
vs. Switch Current
–4V
–5V
–6V
–7V
–8V
–9V
–10V
–12V
–15V
–20V
80
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
EN = 20V
V
IN
= 20V
0
46
81 01 21 41 61 82 0
INPUT VOLTAGE (V)
SWITCH CURRENT (A)
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
46
Switch Current Limit
vs. Input Voltage
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
Switch Current Limit
vs. Temperature
2.0
V
SAT
vs. Temperature
1.5
I
SW
= Current Limit
1.0
I
SW
= 850mA
0.5
I
SW
= 1200mA
I
SW
= 500mA
EN = V
IN
81 01 21 41 61 82 0
INPUT VOLTAGE (V)
V
IN
= 12V
1.0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
1.270
1.265
1.260
1.255
1.250
1.245
Feedback Voltage
vs. Temperature
1.290
1.285
1.280
1.275
1.270
1.265
1.260
Enable Threshold ON
vs. Temperature
25
24
23
22
21
20
19
18
17
Enable Current
vs. Temperature
V
IN
= 12V
Load = 100mA
1.240
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
1.255
1.250
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
V
IN
= 12V
EN = 0V
16
V
IN
= 12V
15
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
September 2009
4
M9999-090909-A
Micrel, Inc.
MIC2601/2
Typical Characteristics
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
46
Frequency
vs. Input Voltage
MIC2602
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
Frequency
vs. Temperature
MIC2602
18V
OUT
Efficiency
100
90
80
70
60
50
40
30
20
8V
IN
12V
IN
MIC2601
81 01 21 41 61 82 0
INPUT VOLTAGE (V)
1.0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
MIC2601
10
0
0 100 200 300 400 500 600 700 800
LOAD CURRENT (mA)
18V
OUT
Efficiency
100
90
80
70
60
50
40
0 10 20 30 40 50 60 70 80 90 100
LOAD CURRENT (mA)
8V
IN
4.5V
IN
12V
IN
0.100
0.097
0.094
0.091
0.088
0.085
0.082
0.079
0.076
0.073
Shutdown Current
vs. Temperature
Thermal Derating
900
800
700
600
500
400
300
200
0.070
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
EN = 0V
V
IN
= 12V
100 V
IN
= 12V
V
OUT
= 18V
0
-40 -20 0 20 40 60 80 100 120
TEMPERATURE (°C)
September 2009
5
M9999-090909-A
嵌入式系统
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