MIC9130 Datasheet PDF - Micrel Semiconductor

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MIC9130
Micrel Semiconductor

Part Number MIC9130
Description High-Speed Telecom DC-to-DC Controller
Page 19 Pages


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MIC9130
MIC9130
Micrel, Inc.
High-Voltage, High-Speed Telecom DC-to-DC Controller
General Description
The MIC9130 is a current-mode PWM controller that efciently
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 simplies 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 efciency power
supplies. It can achieve efciencies over 90% at high output
currents. Its low 1.3mAquiescent current allows high efciency
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% efciency
• 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
VIN
36V to 72V
MBR0540
12V
40V/0.5A
20Ω
N=5
1μF
16V
T1
1M 0.1μF
38.3k
13 1 2 10
N = 20
N=4
Si4800DY
Si4884DY
B330
2.5μH
330μF (x2)
6.3V
20k 7 FB
6 COMP
1.21k 5 SYNC
332k
0.1μF
8 CPWR
3 RBIAS
12 SS
9 VBIAS
OSC
4
MIC9130
OUT 16
FQD10N20
0.2Ω
200V
ComSpleonpseation
ISNS 14
AGND PGND
11 15
332k
0.2Ω
1W
10nF
4.75k
47pF
OPTO
FEEDBACK
1.5MHz DSL Power Supply
VOUT
3.3V @ 4A
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



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MIC9130
Ordering Information
Part Number
Standard
Pb-Free
MIC9130BM
MIC9130BQS
MIC9130YM
MIC9130YQS
Max. Duty Cycle Junction Temp. Range
50%
50%
-40°C to +125°C
-40°C to +125°C
Package
16-Pin SOP
16-Pin QSOP
Micrel, Inc.
Pin Conguration
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
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
M9999-111108
Pin Name
LINE
VCC
RBIAS
OSC
SYNC
COMP
FB
CPWR
VBIAS
EN
AGND
SS
UVLO
ISNS
PGND
OUT
16-Pin SOP (M)
16-Pin QSOP (QS)
Pin Function
Line (Input): 180Vdc maximum supply input. May be 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 oat.
Compensation (External Components): Error amplier output for external
compensation network connection.
Feedback (Input): Error amplier 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.
2 November 2008



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MIC9130
Micrel, Inc.
Absolute Maximum Ratings (Note 1)
Line Input Voltage (VLINE).......................................... +190V
VCC Input Voltage (VCC) .............................................. +19V
Current Sense Input Voltage (VISNS).............. –0.3 to +5.3V
Enable Voltage (VEN)............................. –0.3 to VCC + 0.3V
Feedback Input Voltage (VFB) ........................ –0.3 to +5.3V
Sync Input Voltage (VSYNC)............................ –0.3 to +5.3V
Soft-Start Voltage (VSS).................................. –0.3 to +5.3V
UVLO Voltage (VUVLO) ................................... –0.3 to +5.3V
Storage Temperature (TS) ........................ –65°C to +150°C
Power Dissipation (PD)
16-pin SOP ...................................400mW @ TA = +85°C
16-pin QSOP ................................245mW @ TA = +85°C
ESD Rating, Note 3
Operating Ratings (Note 2)
Line Input Voltage (VLINE)..................VCC to +180V, Note 4
VCC Input Voltage (VCC) .................................. +9V to +18V
Junction Temperature Range (TJ) ............ –40°C to +125°C
Package Thermal Resistance
16-pin SOP JA) .............................................. 100°C/W
16-pin QSOP JA) ............................................ 163°C/W
Electrical Characteristics
TA = 25°C, VLINE = 48V, VCC = 10V, Rt = 9.47KΩ, Ct = 470pF, RBIAS = 562kΩ, VEN = 10V, VISNS = 0V, VUVLO = 2V, VSYNC = 0V, unless
otherwise noted. Bold values indicate –40 °C TJ +125°C.
Parameter
Condition
Min Typ Max Units
Bias Regulator
Output Voltage
Line Regulation
Load Regulation
Oscillator Section
Initial Accuracy (fOSC)
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
IVBIAS = 0mA; VOSC = 0V (Oscillator OFF)
9V VCC 18V, IVBIAS = 0mA; VOSC = 0V
0mA IVBIAS 5mA; VOSC = 0V
Rt = 9.47KΩ, Ct = 470pF
9V VCC 18V
–40°C TJ 125°C
Note 5
4.7 4.85 5.0
4.6 5.1
24 40
5 30
V
V
mV
mV
180 200 220
fOSC/2
50
2.5
100
4
2.5
0.7
50
kHz
kHz
%
%
MHz
V
V
ns
Error Amp Section
FB Voltage
Open Loop Voltage Gain, AVOL
Unity Gain Bandwidth
PSRR
COMP Sink Current
COMP Source Current
VCOMP Low
VCOMP High
Input Bias Current (IFB)
Slew Rate
VCOMP = VFB
9V VCC 18V
VFB = 2.7V; VCOMP = 5V
VFB = 2.3V; VCOMP = 0V
VFB = 2.7V; ICOMP = –50μA
VFB = 2.3V; ICOMP = +500μA
VFB = VCOMP
SINK
SOURCE
2.475 2.5 2.525
2.45 2.55
V
90 dB
4 MHz
60 dB
80 100
μA
1 2.5
mA
115 300 mV
3.5 4
V
160 nA
1.5 V/μs
1.5 V/μs
November 2008
3
M9999-111108



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MIC9130
Parameter
Preregulator
Input Leakage Current
VCC Gate Lockout (VGLO(ON))
VCC Gate Lockout Hysteresis
(ΔVGLO)
VCC Pre-Regulator Off (VPR(OFF))
Condition
VLINE = 180V, VCC = 10V
VLINE = 48V
VLINE = 48V
VLINE = 48V
VCC Pre-Regulator Hysteresis
(ΔVPR)
Start-up Current
Supply
Supply Current, IVCC
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
VLINE = 48V
VLINE = 48V, VCC = 7.5V, Note 4
Pin 16 (OUT) = OPEN
VEN = 0V ,10V; VLINE = 48V
VEN = 0V ; VCC = 18V
VISNS = 0V to 5V
VISNS = 0V
VCPWR = 5V, 0V
VSS = 0V
VISNS = 5V
SOURCE ; ISOURCE = 200mA
SINK ; ISINK = 200mA
COUT = 500pF
COUT = 500pF
Micrel, Inc.
Min Typ Max Units
0.1 10
7.2 7.5
700 800
7.7
VGLO(ON)
+0.5V
500 700
9 12
μA
V
mV
V
mV
mA
1.3 1.5 mA
–10 0.1 10 μA
0.1 10 μA
0.772
30
1
–1
2.5
1.16
0.83 0.888
34
40 50
1.6 2.2
150
+1
1.6
46
1.22 1.28
140
145
25
V
ns
μA
V
mV
μA
V
μA
V
mV
°C
°C
21 ns
8 12 Ω
4 6Ω
12 ns
8 ns
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
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



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