MIC9130
Micrel, Inc.
MIC9130
High-Voltage, High-Speed Telecom DC-to-DC Controller
General Description
The MIC9130 is a current-mode PWM controller that efficiently
converts –48V telecom voltages to logic levels. The MIC9130
features a high voltage start-up circuit that allows the device to
be connected to input voltages as high as 180V. The high input
voltage capability protects the MIC9130 from line transients
that are common in telecom systems. The start-up circuitry
also saves valuable board space and simplifies designs by
integrating several external components.
The MIC9130 is capable of high speed operation. Typically
the MIC9130 can control a sub-25ns pulse width on the gate
out pin. Its internal oscillator can operate over 2.5MHz, with
even higher frequencies available through synchronisation.
The high speed operation of the MIC9130 is made safe by
the very fast, 34ns response from current sense to output,
minimizing power dissipation in a fault condition.
The MIC9130 allows for the designs of high efficiency power
supplies. It can achieve efficiencies over 90% at high output
currents. Its low 1.3mA quiescent current allows high efficiency
even at light loads.
The MIC9130 has a maximum duty cycle of 50%. For de-
signs requiring a high duty cycle, refer to the MIC9131. The
MIC9130 is available in a 16-pin SOP and 16-pin QSOP
package options. The rated junction temperature range is
from –40°C to +125°C.
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Input voltages up to 180V
Internal oscillator capable of >2.5MHz operation
Synchronisation capability to 4MHz
Current sense delay of 34ns
Minimum pulse width <25ns
90% efficiency
1.3mA quiescent current
1μA shutdown current
Soft-start
Resistor programmable current sense threshold
Selectable soft-start retry
4Ω sink, 12Ω source output driver
Programmable under-voltage lockout
Constant-frequency PWM current-mode control
16-pin SOIC and 16-pin QSOP
Applications
•
•
•
•
•
Telecom power supplies
Line cards
ISDN network terminators
Micro- and pico-cell base stations
Low power (< 30W) dc-dc converters
Typical Application
12V
MBR0540
40V/0.5A
20Ω
N=5
T1
1μF
16V
VIN
36V to 72V
1M
0.1μF
N = 20
N=4
Si4800DY
B330
38.3k
13
1
2
10
2.5μH
VOUT
3.3V @ 4A
330μF (x2)
6.3V
UVLO
LINE
VCC
20k
7
6
1.21k
FB
COMP
SYNC
CPWR
RBIAS
SS
VBIAS
OSC
4
EN
Si4884DY
5
8
3
OUT
MIC9130
16
FQD10N20
0.2Ω
200V
Slope
Compensation
ISNS
14
332k
12
9
332k
0.1μF
AGND
11
PGND
15
0.2Ω
1W
4.75k
10nF
47pF
OPTO
FEEDBACK
1.5MHz DSL Power Supply
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
November 2008
1
M9999-111108
MIC9130
Micrel, Inc.
Part Number
Max. Duty Cycle
50%
50%
Junction Temp. Range
-40°C to +125°C
-40°C to +125°C
Package
16-Pin SOP
16-Pin QSOP
Ordering Information
Standard
MIC9130BM
MIC9130BQS
Pb-Free
MIC9130YM
MIC9130YQS
Pin Configuration
LINE 1
VCC 2
RBIAS 3
OSC 4
SYNC 5
COMP 6
FB 7
CPWR 8
16 OUT
15 PGND
14 ISNS
13 UVLO
12 SS
11 AGND
10 EN
9 VBIAS
16-Pin SOP (M)
16-Pin QSOP (QS)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
Pin Name
LINE
VCC
RBIAS
OSC
SYNC
COMP
FB
CPWR
Pin Function
Line (Input): 180Vdc maximum supply input. May be
fl
oated if unused.
Supply (Input): MIC9130 internal supply input.
Bias Resistor (External Component): Connect 562KΩ to ground.
Oscillator RC Network (External Components): Connect external resistor-
capacitor network to set oscillator frequency.
Synchronization (Input): External oscillator input for slave operation of
controller. See OSC. Do not
fl
oat.
Compensation (External Components): Error amplifier output for external
compensation network connection.
Feedback (Input): Error amplifier inverting input.
Current Limit Selection (Input): When CPWR is high, an over-current
condition at the ISNS input will terminate the gate drive and reset the
soft-start latch. If the CPWR pin is low, an over-current condition at the ISNS
input will terminate the gate drive signal, but will not cause a reset of the
soft-start circuit.
Reference (Output): Internal 5V supply. Will source 5mA maximum.
Enable (Input): Logic level enable/shutdown input; logic high = enabled (on),
logic low = shutdown (off).
Analog Ground (Return)
Soft-Start (External Components): Connect external capacitor to slowly ramp
up duty cycle during startup and over-current conditions.
Undervoltage Lockout (External Components): Connect to unbiased resistive
divider network to set controller’s minimum operating voltage. Connect to
VBIAS if not needed.
Current Sense (Input): Connect between external switching MOSFET source
and switch current sense resistor.
Power Ground (Return)
Switch Drive Output (Output): Connect to gate of external switching
MOSFET.
9
10
11
12
13
VBIAS
EN
AGND
SS
UVLO
14
15
16
ISNS
PGND
OUT
M9999-111108
2
November 2008
MIC9130
Micrel, Inc.
Absolute Maximum Ratings
(Note 1)
Line Input Voltage (V
LINE
).......................................... +190V
V
CC
Input Voltage (V
CC
) .............................................. +19V
Current Sense Input Voltage (V
ISNS
) .............. –0.3 to +5.3V
Enable Voltage (V
EN
)............................. –0.3 to V
CC
+ 0.3V
Feedback Input Voltage (V
FB
) ........................ –0.3 to +5.3V
Sync Input Voltage (V
SYNC
) ............................ –0.3 to +5.3V
Soft-Start Voltage (V
SS
) .................................. –0.3 to +5.3V
UVLO Voltage (V
UVLO
) ................................... –0.3 to +5.3V
Storage Temperature (T
S
) ........................ –65°C to +150°C
Power Dissipation (P
D
)
16-pin SOP ...................................400mW @ T
A
= +85°C
16-pin QSOP ................................245mW @ T
A
= +85°C
ESD Rating,
Note 3
Operating Ratings
(Note 2)
Line Input Voltage (V
LINE
)..................V
CC
to +180V,
Note 4
V
CC
Input Voltage (V
CC
) .................................. +9V to +18V
Junction Temperature Range (T
J
) ............ –40°C to +125°C
Package Thermal Resistance
16-pin SOP
(θ
JA
) .............................................. 100°C/W
16-pin QSOP
(θ
JA
) ............................................ 163°C/W
Electrical Characteristics
T
A
= 25°C, V
LINE
= 48V, V
CC
= 10V, R
t
= 9.47KΩ, C
t
= 470pF, R
BIAS
= 562kΩ, V
EN
= 10V, V
ISNS
= 0V, V
UVLO
= 2V
,
V
SYNC
= 0V, unless
otherwise noted.
Bold
values indicate –40 °C
≤T
J
≤
+125°C.
Parameter
Bias Regulator
Output Voltage
Line Regulation
Load Regulation
Oscillator Section
Initial Accuracy (f
OSC
)
Oscillator Output Frequency
Maximum Duty Cycle
Voltage Stability (Δf/f)
Temperature Stability
ppm/°C
Maximum Sync Frequency
Sync Threshold Level
Sync Hysteresis
Sync Minimum Pulse Width
Error Amp Section
FB Voltage
Open Loop Voltage Gain, A
VOL
Unity Gain Bandwidth
PSRR
COMP Sink Current
COMP Source Current
V
COMP
Low
V
COMP
High
Input Bias Current (I
FB
)
Slew Rate
9V
≤
V
CC
≤
18V
V
FB
= 2.7V; V
COMP
= 5V
V
FB
= 2.3V; V
COMP
= 0V
V
FB
= 2.7V; I
COMP
= –50μA
V
FB
= 2.3V; I
COMP
= +500μA
V
FB
= V
COMP
SINK
SOURCE
3.5
80
1
V
COMP
= V
FB
2.475
2.45
2.5
90
4
60
100
2.5
115
4
160
1.5
1.5
300
2.525
2.55
V
dB
MHz
dB
μA
mA
mV
V
nA
V/μs
V/μs
9V
≤
V
CC
≤18V
–40°C
≤
T
J
≤
125°C
Note 5
R
t
= 9.47KΩ, C
t
= 470pF
180
200
f
OSC/2
50
2.5
100
4
2.5
0.7
50
MHz
V
V
ns
220
kHz
kHz
%
%
I
VBIAS
= 0mA; V
OSC
= 0V (Oscillator OFF)
9V
≤
V
CC
≤18V,
I
VBIAS
= 0mA; V
OSC
= 0V
0mA
≤
I
VBIAS
≤
5mA; V
OSC
= 0V
4.7
4.6
24
5
4.85
5.0
5.1
40
30
V
V
mV
mV
Condition
Min
Typ
Max
Units
November 2008
3
M9999-111108
MIC9130
Parameter
Preregulator
Input Leakage Current
V
CC
Gate Lockout (V
GLO(ON)
)
V
CC
Gate Lockout Hysteresis
(ΔV
GLO
)
V
CC
Pre-Regulator Off (V
PR(OFF)
)
V
CC
Pre-Regulator Hysteresis
(ΔV
PR
)
Start-up Current
Supply
Supply Current, I
VCC
Enable Input Current
Shutdown Supply Current
Protection and Control
Current Limit Threshold Voltage
Current Limit Delay to Output
Current Limit Source Current
Enable Input Threshold (Turn-on)
Enable Input Hysteresis
CPWR Input Current
CPWR Threshold
Soft-Start Current
Line UVLO Threshold (Turn-on)
Line UVLO Threshold Hysteresis
Thermal Shutdown
Thermal Shutdown Hysteresis
MOSFET Driver
Output Minimum On-Time
Output Driver Impedance
Rise Time
Fall Time
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Micrel, Inc.
Condition
V
LINE
= 180V, V
CC
= 10V
V
LINE
= 48V
V
LINE
= 48V
V
LINE
= 48V
V
LINE
= 48V
V
LINE
= 48V, V
CC
= 7.5V,
Note 4
Pin 16 (OUT) = OPEN
V
EN
= 0V ,10V; V
LINE
= 48V
V
EN
= 0V ; V
CC
= 18V
0.772
V
ISNS
= 0V to 5V
V
ISNS
= 0V
30
1
V
CPWR
= 5V, 0V
V
SS
= 0V
–1
1.6
2.5
1.16
4
1.22
140
145
25
V
ISNS
= 5V
SOURCE ; I
SOURCE
= 200mA
SINK ; I
SINK
= 200mA
C
OUT
= 500pF
C
OUT
= 500pF
21
8
4
12
8
12
6
6
1.28
–10
7.2
700
7.7
500
9
Min
Typ
0.1
7.5
800
V
GLO(ON)
Max
10
Units
μA
V
mV
V
mV
mA
+0.5V
700
12
1.3
0.1
0.1
0.83
34
40
1.6
150
1.5
10
10
0.888
50
2.2
+1
mA
μA
μA
V
ns
μA
V
mV
μA
V
μA
V
mV
°C
°C
ns
Ω
Ω
ns
ns
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended.
If a substained DC voltage >150V is applied to the LINE pin, a current-limiting 1.8kΩresistor should be used in series with the LINE pin. This
condition does not apply for transient conditions over 150V.
For oscillator frequencies above 2.5MHz it may be necessary to power to VBIAS pin from an external power source due to the current limita-
tions of the internal 5V regulator. See
Applications Information
for details
M9999-111108
4
November 2008
MIC9130
Micrel, Inc.
Typical Characteristics
Oscillator Frequency
vs. V
CC
Voltage
OSC FREQ. VARIATION (%)
2.0
OSC FREQ. VARIATION (%)
5
4
3
2
1
0
-1
-2
-3
-4
-5
-40
Oscillator Frequency
vs. Temperature
REFERENCE VOLTAGE (V)
F
OSC (NOM)
=200kHz
1.5 R =9.47K
t
1.0 Ct=470pF
0.5
0
2.502
Error Amp Reference
Voltage vs. V
CC
Voltage
R
B IAS
= 560K
2.501
-0.5
-1.0
-1.5
-2.0
8 9 10 11 12 13 14 15 16 17 18
V
CC
(V)
V
C C
= 10V
R
B IAS
= 560K
Rt = 9.47K
Ct = 470pF
0
40
80
120
TEMPERATURE (°C)
160
2.500
2.499
8 9 10 11 12 13 14 15 16 17 18
V
CC
(V)
2.510
REFERENCE VOLTAGE (V)
Error Amp Reference
Voltage vs. Temperature
2.500
2.495
2.490
2.485
2.480
-40 -20 0 20 40 60 80 100120140
TEMPERATURE (°C)
THRESHOLD (V)
1.210
1.205
1.200
1.195
1.190
1.185
1.180
8 9 10 11 12 13 14 15 16 17 18
VCC (V)
UVLO THRESHOLD (V)
V = 10V
CC
2.505 R
B IAS
= 560K
1.220
1.215
Line UVLO Threshold
vs. V
CC
1.24
1.23
1.22
1.21
1.2
1.19
1.18
-40
Line UVLO Threshold
vs. Temperature
V
C C
=10V
R
B IAS
=560K
0
40
80
120
TEMPERATURE (°C)
160
2.4
QUIESCENT CURRENT (mA)
Quiescent Current
vs. V
CC
Voltage
QUIESCENT CURRENT (mA)
QUIESCENT CURRENT (mA)
2.2
2.0
1.8
1.6
1.4
1.2
1.0
8
R
B IAS
= 560K
R = 9.47K
t
C = 470pF
t
10
12
14
V
CC
(V)
16
18
1.4
V = 10V
1.39
C C
R
B IAS
= 560K
1.38
R = 9.47K
1.37 t
C = 470pF
1.36 t
1.35
1.34
1.33
1.32
1.31
1.3
-40 -20 0 20 40 60 80 100120140
TEMPERATURE (°C)
Quiescent Current
vs. Temperature
10
9
8
7
6
5
4
3
2
1
0
0
Quiescent Current
vs. Frequency
Ct = 470pF
Ct = 120pF
200 400 600 800 1000
GATE DRIVE FREQUENCY (kHz)
3.5
QUIESCENT CURRENT (mA)
Quiescent Current
vs. R
BIAS
V
C C
= 10V
R = 9.53K
t
Ct = 470pf
f
OSC
= 200kHz
ISNS to Gate Output Delay
vs. R
BIAS
90
80
70
DELAY (ns)
50
40
30
20
10
0
0
DELAY (ns)
60
350
300
250
200
150
100
ISNS to Gate Output Delay
vs. Overdrive
3
2.5
2
1.5
1
R
B IAS
=560K
R
B IAS
=360K
R
B IAS
=160K
OVERDRIVE (mV)
50
200 400 600 800 1000 1200
R
BIAS
(kΩ)
0
200
400
600
800
1000
1200
1400
1600
1800
2000
0
200 400 600 800 1000 1200
R
BIAS
(kΩ)
0
November 2008
5
M9999-111108
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