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SiP12107
Vishay Siliconix
5 V, 3 A Current-Mode Constant On-Time
Synchronous Buck Regulator
DESCRIPTION
The SiP12107 is a high frequency current-mode constant
on-time (CM-COT) synchronous buck regulator with
integrated high-side and low-side power MOSFETs. Its
power stage is capable of supplying 3 A continuous current
at 4 MHz switching frequency. This regulator produces an
adjustable output voltage down to 0.6 V from 2.8 V to 5.5 V
input rail to accommodate a variety of applications,
including computing, consumer electronics, telecom, and
industrial.
SiP12107’s CM-COT architecture delivers ultra-fast
transient response with minimum output capacitance and
tight ripple regulation at very light load. No ESR or external
ESR network is required for loop stability purpose. The
device also incorporates a power saving scheme that
significantly increases light load efficiency.
The regulator integrates a full protection feature set,
including output overvoltage protection (OVP), output under
voltage protection (UVP) and thermal shutdown (OTP). It
also has UVLO for input rail and internal soft-start ramp.
The SiP12107 is available in lead (Pb)-free power enhanced
MLP-16L package in 3 mm x 3 mm dimension.
FEATURES
Halogen-free According to IEC 61249-2-21
Definition
• 2.8 V to 5.5 V input voltage
• Adjustable output voltage down to 0.6 V
• 3 A continuous output current
• Programmable switching frequency up to 4 MHz
• 95 % peak efficiency
• Supports all ceramic capacitors No external ESR required
• Ultrafast transient response
• Selectable power saving mode or force current mode
• ± 1 % accuracy
• Pulse-by-pulse current limit
• Scalable with SiP12108 - 5A
• Fully protected with OTP, SCP, UVP, OVP
• PGood Indicator
• Compliant to RoHS Directive 2011/65/EU
APPLICATIONS
• Notebook computers
• Desktop PCs and servers
• Handheld devices
• POLs for telecom
• Consumer electronics
• Industrial and automation
TYPICAL APPLICATION CIRCUIT AND PACKAGE OPTIONS
PWR_SAVE_MODE
ENABLE
POWER GOOD
INPUT = 2.8 V to 5.5 V
PGD
VIN
EN AUTO
LX
VOUT
AVIN
PGND
AGND
VFB
GMO
RON
VOUT
Fig. 1 - Typical Application Circuit for SiP12107
S12-0412-Rev. B, 20-Feb-12
1
Document Number: 63395
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ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

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ABSOLUTE MAXIMUM RATINGS
ELECTRICAL PARAMETER
VIN
AVIN
LX
AGND to PGND
All Logic Inputs
TEMPERATURE
Max. Operating Junction Temperature
Storage Temperature
POWER DISSIPATION
Junction to Ambient Thermal Impedance
(RthJA)
Maximum Power Dissipation
ESD PROTECTION
CONDITIONS
Reference to PGND
Reference to AGND
Reference to PGND
Reference to AGND
Ambient Temperature = 25 °C
Ambient Temperature = 100 °C
HBM
SiP12107
Vishay Siliconix
LIMIT
- 0.3 to 6
- 0.3 to 6
- 0.3 to 6
- 0.3 to + 0.3
- 0.3 to AVIN + 0.3
150
- 65 to 150
36.3
3.4
1.3
2
UNIT
V
°C
°C/W
W
kV
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation
of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING RANGE
ELECTRICAL PARAMETER
VIN
AVIN
LX
VOUT
Ambient Temperature
MINIMUM
2.8
2.8
-1
0.6
TYPICAL
-
-
-
-
- 40 to 85
MAXIMUM
5.5
5.5
5.5
0.85 x VIN
UNIT
V
°C
S12-0412-Rev. B, 20-Feb-12
2
Document Number: 63395
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

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SiP12107
Vishay Siliconix
ELECTRICAL SPECIFICATIONS
PARAMETER
SYMBOL
POWER SUPPLY
Power Input Voltage Range
Bias Input Voltage Range
Input Current
Shutdown Current
AVIN UVLO Threshold
AVIN UVLO Hysteresis
PWM CONTROLLER
Feedback Reference
VFB Input Bias Current
Transconductance
COMP Source Current
COMP Sink Current
Switching Frequency Range
Minimum On-Time
Minimum Off-Time
Soft Start Time
INTEGRATED MOSFETS
High-Side On Resistance
Low-Side On Resistance
FAULT PROTECTIONS
Over Current Limit
Output OVP Threshold
Output UVP Threshold
Over Temperature Protection
POWER GOOD
Power Good Output Threshold
Power Good On Resistance
Power Good Delay Time
ENABLE THRESHOLD
Logic High Level
Logic Low Level
VIN
AVIN
IVIN_NOLOAD
IVIN_SHDN
AVIN, UVLO
UVLOHYS
VFB
TEST CONDITION UNLESS OTHERWISE
SPECIFIED
VIN = AVIN = 3.3 V, TA = - 40 °C to 85 °C
Device switching, IO = 0 A,
Ron = 100 k, AUTO = Low
EN = 0 V
AVIN rising edge
TA = 0 °C to + 70 °C
TA = - 40 °C to + 85 °C
Guaranted by design
Guaranted by design
VOUT = 1.2 V, RON = 100 k
VIN = 3.3 V
Inductor valley current
VFB with respect to 0.6 V reference
Rising temperature
Hysteresis
VFB rising above 0.6 V reference
VFB falling below 0.6 V reference
MIN.
LIMITS
TYP.
MAX.
UNIT
2.8 - 5.5
V
2.8 - 5.5
- 1000 -
μA
- 6 12
- 2.55 -
V
- 300 - mV
0.594
0.591
-
-
-
-
0.2
-
-
-
0.600
0.600
2
1
50
50
-
50
120
1.5
0.606
0.609
200
-
-
-
4
-
-
-
V
nA
mS
μA
MHz
ns
ms
- 56 -
m
- 33 -
- 4.5 - A
- 20 -
%
- - 25 -
- 160 -
°C
- 35 -
- 20 -
%
- - 10 -
- 30 -
- 6 - μs
1.5 -
-
V
- - 0.4
S12-0412-Rev. B, 20-Feb-12
3
Document Number: 63395
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FUNCTIONAL BLOCK DIAGRAM
AGND
8
SOFT
START
9
VFB
Isense
+
+ OTA
-
I-V
Converter
RON
4
VOUT
10
PAD
VFB
7
GMO
2
AVIN
P
GOOD
6
5
AUTO
3
EN
0.6 V
REFERENCE
UVLO
VIN
OTP
VIN
+
-
PWM COMPARATOR
ON-TIME
GENERATOR
CONTROL
LOGIC
SECTION
ANTI -XCOND
CONTROL
VIN
0.45 V
0.72 V
-
+
UV Comparator
+
- OV Comparator
ZCD
OCP
Isense
Current
Mirror
SiP12107
Vishay Siliconix
1,16
VIN
LX
11,12,13
P
GND
14,15
ORDERING INFORMATION
PART NUMBER
SIP12107DMP-T1-GE3
SIP12107DB
Fig. 2 - SiP12107 Functional Block Diagram
PACKAGE
QFN33-16L
Reference Board
MARKING
(LINE 2: P/N)
2107
P/N
AA
W11B
Format:
Line 1: Dot
Line 2: P/N
Line 2: Siliconix Logo + ESD Symbol
Line 3: Factory Code + Year Code + Work Week Code + Lot Code
S12-0412-Rev. B, 20-Feb-12
4
Document Number: 63395
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

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PIN CONFIGURATION
16 15 14 13
VIN 1
AVIN 2
EN 3
RON 4
5 678
12 LX
11 LX
10 VOUT
9 VFB
MLPQ 3 x 3 - 16L
Fig. 3 - SiP12107 Pin Configuration (Top View)
SiP12107
Vishay Siliconix
PIN CONFIGURATION
PIN NUMBER
NAME
1 VIN
2 AVIN
3 EN
4 RON
5 AUTO
6 PGD
7 GMO
8 AGND
9 VFB
10 VOUT
11 LX
12 LX
13 LX
14 PGND
15 PGND
16 VIN
FUNCTION
Input supply voltage for power MOS. VIN = 2.8 V to 5.5 V
Input supply voltage for internal circuitry. AVIN = 2.8 V to 5.5 V
Enable pin. Enable > 1.5 V
An external resistor between RON and GND sets the switching on time.
Sets switching mode AUTO to AVIN = PWM, AUTO to GND = light load mode
Power good output. Open drain.
Connect to an external RC network for loop compensation and droop function
Analog ground
Feedback voltage. 0.6 V (typ.)
VOUT, output voltage sense connection
Switching output, inductor connection point
Switching output, inductor connection point
Switching output, inductor connection point
Power ground
Power ground
Input supply voltage for power MOS. VIN = 2.8 V to 5.5 V
S12-0412-Rev. B, 20-Feb-12
5
Document Number: 63395
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000