MIC2130/1
High Voltage Synchronous Buck
Control IC with Low EMI Option
General Description
The MIC2130/1 is a high voltage input PWM synchronous
buck controller IC. It is a voltage mode controller with a
fast hysteretic control loop (FHyCL) employed during fast
line and load transients. The internal gate drivers are
designed to drive high current MOSFETs.
The MIC2130/1 can produce output voltages down to 0.7V
with input voltage from 8V to 40V. The MIC2130 family of
control ICs implements fixed frequency PWM control. The
active anti-shoot through drive scheme means a wide
range of external MOSFETs may be used while
maintaining optimum efficiency.
The MIC2131 is the fully functional version of the family
and implements a new feature to minimize EMI. This
function is critical for systems that need to be compliant
with EMI standards throughout the world.
The MIC2130/1 is available in small size 16-pin 4mm x
4mm MLF
®
package, as well as 16-pin e-TSSOP at a
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
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
8V to 40V input voltage range
Adjustable output voltages down to 0.7V
LOW EMI option MIC2131
Fixed 150kHz and 400kHz frequency options
Excellent line and load regulation due to fast hysteretic
control loop during transients
Adaptive gate drive allows efficiencies over 95%
Programmable current limit with no sense resistor
Senses low-side MOSFET current
Internal drivers allow 15A output current
Power Good output allow simple sequencing
Programmable soft-start pin
100% increase in current limit (MIC2131)
Output over-voltage protection
Programmable Input UVLO
16-pin e-TSSOP and 16-pin 4mm x 4mm MLF
®
Junction temperature range of –40°C to +125°C
Applications
•
•
•
•
•
•
Industrial/Medical DC/DC point of use power
Printer head drivers
Automotive Systems
Telecom systems
LCD/ Plasma TV
Gaming Machines
Typical Application
98
94
92
90
88
86
84
82
80
30V
40V
4 5 6 7
OUTPUT CURRENT (A)
24V
Efficiency V
OUT
= 3.3V
@ +25°C
8V
20V
10V
96 12V
MIC2130/1 High Input Voltage Converter
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
April 2008
M9999-042108-C
Micrel, Inc.
MIC2130/1
Ordering Information
Part Number
MIC2130-1YML
MIC2130-4YML
MIC2130-1YTSE
MIC2130-4YTSE
MIC2131-1YML
MIC2131-4YML
MIC2131-1YTSE
MIC2131-4YTSE
Frequency
150kHz
400kHz
150kHz
400kHz
150kHz
400kHz
150kHz
400kHz
Output
Voltage
Adj.
Adj.
Adj.
Adj.
Adj.
Adj.
Adj.
Adj.
Low EMI
No
No
No
No
Yes
Yes
Yes
Yes
Junction Temp.
Range
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
–40° to +125°C
Package
16-Pin 4x4 MLF
®
16-Pin 4x4 MLF
®
Lead Finish
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
Pb-Free
16-Pin e-TSSOP
16-Pin e-TSSOP
16-Pin 4x4 MLF
®
16-Pin 4x4 MLF
®
16-Pin e-TSSOP
16-Pin e-TSSOP
Pin Configuration
PGOOD
AVDD
BST
AVDD
1
16 CS
15 BST
14 HSD
13 SW
12 PGND
11 LSD
10 VDD
9 VIN
CS
PGOOD 2
HCL/AGND2
SS
FB
COMP
HSD
SW
PGND
LSD
HCL/AGND2 3
SS 4
FB 5
COMP 6
AGND1 7
VIN
EN/UVLO
AGND1
VDD
EN/UVLO 8
16-Pin 4mm x 4mm MLF (ML)
®
16-Pin e-TSSOP (TS)
April 2008
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M9999-042108-C
Micrel, Inc.
MIC2130/1
Pin Description
Pin Number
MLF-16
1
Pin Number
e-TSSOP-16
3
Pin Name
HCL*
AGND2
SS
FB
COMP
AGND1
EN/UVLO
Pin Function
High Current Limit (Output): The capacitor on this pin sets
the duration of time so that the current limit will be set to
200% of its nominal set current. AGND2 for MIC2130
Soft Start (Output): Active at Power-up, Enable, and Current
Limit recovery.
Feedback (Output): Input to error amplifier. Regulates to
0.7V.
Compensation (Output): Pin for external compensation.
Analog Ground.
Enable (Input): Logic low turns the IC off. When the voltage
drops below the band gap reference voltage of the IC the
device turns off. This accurate threshold allows the pin to be
used as an accurate under voltage lockout.
Supply Voltage (Input): 8V to 40V.
5V Internal Linear Regulator from VIN. When VIN is <8V,
this regulator operates in drop-out mode. Connect external
bypass capacitor.
Low-Side Drive (Output): High-current driver output for
external low-side MOSFET.
Power Ground: High current return for ext. Low side driver.
Switch Node (Output): High current output driver return.
High-Side Drive (Output): High current output-driver for ext.
high-side MOSFET.
Boost (Output): Provides voltage for high-side MOSFET
driver. The gate drive voltage is higher than the source
voltage by VDD minus a diode drop.
Current Sense (Output): Current-limit comparator non
inverting input. The current limit is sensed across the low-
side FET during the OFF time. Current limit is set by the
resistor in series with the CS pin.
Analog Supply Voltage (internal 5V LDO): Connect external
By pass capacitor.
Power Good (Output): High output when VOUT > 90%
nominal.
2
3
4
5
6
4
5
6
7
8
7
8
9
10
VIN
VDD
9
10
11
12
13
11
12
13
14
15
LSD
PGND
SW
HSD
BST
14
16
CS
15
16
1
2
AVDD
PGOOD
Note:
* indicates that is only used on MIC2131.
April 2008
3
M9999-042108-C
Micrel, Inc.
MIC2130/1
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .......................................................42V
Boot Strapped Voltage (V
BST
).................................. V
IN
+ 5V
Logic Inputs ...................................................................6.5V
EN Input .........................................................................42V
Ambient Storage Temperature (T
s
) ...........–65°C to +150°C
ESD Rating
(3)
............................................................... 1.5kV
Operating Ratings
(2)
Supply Voltage (V
IN1,
V
IN2
)................................ +8V to +40V
Output Voltage Range.................................. 0.7V to 0.85V
IN
Junction Temperature (T
J
) ..................–40°C
≤
T
J
≤
+125°C
Package Thermal Resistance
e-TSSOP (θ
JA
) ................................................97.5°C/W
e-TSSOP (θ
JC
) ................................................29.9°C/W
4x4 MLF-16 (θ
JA
) ............................................50.6°C/W
4x4 MLF-16 (θ
JC
) ............................................15.8°C/W
Electrical Characteristics
(4)
T
J
= 25°C; V
EN
= V
IN
= 24V; Frequency = 150kHz; V
OUT
= 3.3V, unless otherwise specified.
Bold
values indicate –40°C≤ T
J
≤
+125°C.
Parameter
V
IN
, V
EN/UVLO
, V
DD
Supply
Total Supply Current,
PWM Mode Supply Current
Shutdown Current
V
EN
/UVLO Turn-On Threshold
V
EN
/UVLO Turn-Off Threshold
V
IN
UVLO Hysteresis
Internal Bias Voltages (AV
DD
,)
(I
DD
= 50mA)
Oscillator/PWM Section
PWM Frequency
PWM Frequency
Maximum Duty Cycle
Maximum Duty Cycle
Minimum On-Time
Regulation
Feedback Voltage Reference
Feedback Bias Current
V
IN
= 8V – 40V
Output Voltage
Line Regulation
Output Voltage
1A
≤
I
OUT
≤
10A
Load Regulation
Error Amplifier (each channel)
DC Gain
Output Impedance
Transconductance
Output Over voltage Protection
V
FB
Threshold
Delay Blanking Time
Soft Start/HCL
Internal Soft Start
Source Current
HCL (MIC2131) Pin Voltage
High
1
I
LIMIT
set to 200% when HCL charges to2.4V
2.75
2.4
5
µA
V
(Latches LSD High)
110
115
1
120
%Nom
µs
1.2
(±2%) -40°C to +125°C
686
700
300
0.03
0.5
714
1000
mV
nA
%/V
%
V
FB
= 0.7V; Comp = 3V
(Outputs switching but excluding external MOSFET gate
current.)
V
EN
= 0V; V
IN
= 12V
0.7
4.6
4
7.5
mA
Condition
Min
Typ
Max
Units
180
1.1
1.0
100
5
300
1.3
5.3
µA
V
V
mV
V
MIC2130/1-1
MIC2130/1-4
MIC2130/1-1
MIC2130/1-4
Note 5
130
360
92
80
150
400
170
440
kHz
kHz
%
%
50
ns
70
2
1.6
2.5
dB
MΩ
ms
April 2008
4
M9999-042108-C
Micrel, Inc.
Parameter
HCL Low
HCL Pin Charge Up Current
HCL Pin Charge Down Current
LOW/EMI
Frequency Dither Range
Current Sense
CS Over Current Trip Point
Program Current
Temperature Coefficient
CS Comparator Sense
Threshold
Power Good
V
FB
Threshold
PGOOD Voltage Low
Gate Drivers
Rise/Fall Time
(Senses drop across low-side FET)
170
200
+2300
–5
0
+5
230
Of center freq
±12
Condition
I
LIMIT
set to normal when HCL is low
Min
Typ
0.5
2.9
12
MIC2130/1
Max
Units
V
µA
µA
%
µA
ppm/°C
mV
86
V
DD
= 5.0V; V
FB
= 0V; I
PGOOD
= 1mA
Into 3000pF
Source
Sink
HSD: Source; V
DD
= 5V
HSD: Sink; V
DD
= 5V
LSD: Source; V
DD
= 5V
LSD: Sink; V
DD
= 5V
Note 4
T
J
Increasing
T
J
Decreasing
90
0.1
93
0.5
%Nom
V
Output Driver Resistance
23
16
2
1.47
2.2
2.1
60
155
142
ns
ns
Ω
Ω
Ω
Ω
ns
°C
°C
Driver Non-Overlap Time
(Adaptive)
Thermal Shutdown Threshold
Notes:
40
1. Exceeding the absolute maximum rating may damage the device.
2. 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.
3. Devices are ESD sensitive. Handling precautions recommended.
4. Guaranteed by design.
5. Minimum on-time before automatic cycle skipping begins.
April 2008
5
M9999-042108-C
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