MPM3690-50A/B
16V, Dual 25A or Single 50A
DC/DC Power Module
DESCRIPTION
FEATURES
The MPM3690-50 is a dual 25A or single 50A
output power module that offers a complete
power solution with excellent load and line
regulation. The MPM3690-50 supports a 4V to
16V input voltage range and a 0.6V to 1.8V
output voltage range. The voltages at the
MPM3690-50’s two outputs can be set
separately by a single resistor per output.
The MPM3690-50 offers two configurations: the
MPM3690-50A has a dual 25A output, and the
MPM3690-50B has a single 50A output. The
MPM3690-50 is also pin-compatible with the
MPM3690-20A/B (dual 13A or single 26A) and
the MPM3690-30A/B (dual 18A or single 36A)
power modules.
The MPM3690-50 adopts MPS’s proprietary,
multi-phase constant-on-time (MCOT) control,
which provides ultra-fast transient response and
minimizes the output capacitance.
Pin-Compatible Dual 25A and Single 50A
Output Power Modules
o MPM3690-50A Dual 25A
o MPM3690-50B Single 50A
4V to 16V Input Voltage Range
o 3.2V to 16V Input Voltage Range with
External 3.3V VCC Bias
0.6V to 1.8V Output Voltage Range
Ultra-Fast Transient Enabled by COT
Control
Adjustable Switching Frequency
Adjustable Soft-Start Time
Over-Current and Over-Voltage Protection
Differential Remote Sense for Both Output
Channels
Pin-Compatible with the MPM3690-20A/B
and MPM3695-30A/B
Available in a BGA Package
(16mmx16mmx5.18mm)
APPLICATIONS
The MPM3690-50 integrates a monolithic
DC/DC converter, power inductor, and other
passive components, and is available in a BGA
(16mmx16mmx5.18mm) package,
Telecom and Networking Equipment
Industrial Equipment
FPGA and ASIC Power Systems
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.
For MPS green status, please visit the MPS website under Quality Assurance.
“MPS”, the MPS logo, and “Simple, Easy Solutions” are trademarks of
Monolithic Power Systems, Inc. or its subsidiaries.
TYPICAL APPLICATION
10kΩ
4V to 16V
Input
MODE
VCC
CIN
VS1P
FB1
EN1
EN2
EN
PG
RFB
60.4kΩ
95
VS1N
VOUT2
VS2P
FB2
RF
RF
VIN = 12V, with external 3.3V VCC
100
COUT
MPM3690-50B
CSS1
Efficiency vs. Load Current
VOUT = 1.2V/50A
VOUT1
COUT
EFFICIENCY (%)
VIN
90
85
Vout=1.8V,Fsw=600KHz
80
Vout=1.5V,Fsw=600KHz
75
Vout=1.2V,Fsw=600KHz
VS2N
Vout=1V,Fsw=600KHz
70
Vout=0.8V,Fsw=600KHz
65
0
5
10 15 20 25 30 35 40 45 50
LOAD CURRENT (A)
Figure 1: Interleaved Operation at 1.2V, 50A
MPM3690-50 Rev. 1.0
MonolithicPower.com
5/24/2021
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© 2021 MPS. All Rights Reserved.
1
MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
ORDERING INFORMATION
Part Number*
MPM3690GBF-50A
MPM3690GBF-50B
Configuration
Dual 25A Output
Single 50A Output
Package
BGA
(16mmx16mmx5.18mm)
Top Marking
MSL Rating
See Below
3
* For tray, add suffix -T (e.g. MPM3690GBF-50A-T).
TOP MARKING (MPM3690GBF-50A)
MPS: MPS prefix
YY: Year code
WW: Week code
M3690-50A: Part number
LLLLLLLLL: Lot number
M: Module
TOP MARKING (MPM3690GBF-50B)
MPS: MPS prefix
YY: Year code
WW: Week code
M3690-50B: Part number
LLLLLLLLL: Lot number
M: Module
MPM3690-50 Rev. 1.0
MonolithicPower.com
5/24/2021
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
2
MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
PIN-COMPATIBLE PARTS
Part Number
Output
MPM3690GBF-20A
Dual 13A
MPM3690GBF-20B
Single 26A
MPM3690GBF-30A
Dual 18A
MPM3690GBF-30B
Single 36A
MPM3690GBF-50A
Dual 25A
MPM3690GBF-50B
Single 50A
Description
4V to 16V
package
4V to 16V
package
4V to 16V
package
4V to 16V
package
4V to 16V
package
4V to 16V
package
input, 0.6V to 3.3V output, BGA (16mmx16mmx5.18mm)
input, 0.6V to 3.3V output, BGA (16mmx16mmx5.18mm)
input, 0.6V to 3.3V output, BGA (16mmx16mmx5.18mm)
input, 0.6V to 3.3V output, BGA (16mmx16mmx5.18mm)
input, 0.6V to 1.8V output, BGA (16mmx16mmx5.18mm)
input, 0.6V to 1.8V output, BGA (16mmx16mmx5.18mm)
Order directly from MonolithicPower.com or our distributors.
PACKAGE REFERENCE
TOP VIEW
NC2
NC3
M
L
VIN
VIN
K
J
PMODE
RAMP1 H
SW1
G
RAMP2
F
MODE
SS1
FB1
EN1
VCC
SW2
PG1
PG2
EN2
VSOUT
VSOUT
NC4
GND
NC1 FSET2
GND
E
VS1N FB2 SS2
GND
D
FSET1 VS2N VS2P
VS1P
C
B
VOUT1
VOUT2
GND
A
1
2
3
4
5
6
7
8
9
10
11
12
BGA Package (16mmx16mmx5.18mm)
MPM3690-50 Rev. 1.0
MonolithicPower.com
5/24/2021
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© 2021 MPS. All Rights Reserved.
3
MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
PIN FUNCTIONS
Pin Number
A1–A5, B1–B5, C1–
C4
A6, A7, B6, B7, D1–
D4, D9–D12, E1–E4,
E10, E11, E12, F1,
F2, F3, F6, F7, F10,
F11, F12, G1, G3,
G7, G10, G12, H1–
H7, H9–H12, J1, J5,
J8, J12, K1, K5–K8,
K12, L1, L12, M1,
M12
A8–A12, B8–B12,
C9–C12
C5, C8
D6, C7
C6, E7
D5, D7
E5, D8
G5, G4
E8, F8
F4
F5, F9
G2, G11
G6
G9, G8
H8
E6, J6, J7, E9
M2–M11, L2–L11, J2,
J3, J4, J9, J10, J11,
K2, K3, K4, K9, K10,
K11
Name
VOUT1
GND
VOUT2
Description
Power output 1. Power output pins for channel 1.
Power ground. GND is the ground of the regulated output voltage (VOUT).
Power output 2. Power output pins for channel 2.
VS1P,
VS2P
Positive input of the remote-sense amplifier. Connect these pins to the
VOUT remote sense point.
Negative input of the remote-sense amplifier. Connect these pins to the
VS1N,
output GND remote sense point to enable remote sense. Connect directly
VS2N
to GND to disable the remote sense function.
Frequency set. Connect a resistor between these pins and AGND to
FSET1,
configure the switching frequency (fSW) between 400kHz to 1MHz. For the
FSET2
MPM3690-50B, the FSET1 and FSET2 resistors must be the same.
Feedback voltage. Connect a resistor to these pins between VS1N and
FB1, FB2 VS2N to configure VOUT. This pin is connected to VS1P and VS2P with a
60.4kΩ resistor.
Soft-start time setting. Connect a ceramic capacitor to set the soft-start
SS1, SS2
time (tSS).
Ramp selection pin. Float these pins to set the internal compensation
RAMP1,
ramp to high; pull these pins pin low to set the internal compensation ramp
RAMP2
to low.
VSOUT
Not connected (internally floated). Float these pins.
Operation mode set. Pull MODE up to VCC for forced continuous
MODE
conduction mode (FCCM).
Enable pins. Drive EN pin high to turn the output on, drive it low to turn the
EN1, EN2
output off. Do not float this pin.
SW1, SW2 Switching nodes. Float these pins.
Protection mode selection. Connect PMODE to GND for latch-off mode,
PMODE
pull PMODE up to VCC for hiccup mode.
Power good outputs. The output of the PG pins is an open drain. Pull the
PG1, PG2
PG pins high with a pull-up resistor.
Output of the internal power supply. Float this pin or connect it to an
VCC
external 3.3V power supply to improve efficiency.
NC1, NC2,
Not connected (internally floated). Float these pins.
NC3, NC4
VIN
Supply voltage. Connect input voltage between these pins and GND pins.
MPM3690-50 Rev. 1.0
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5/24/2021
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© 2021 MPS. All Rights Reserved.
4
MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
PIN MAP
Table 1: Pins A1–F12
Pin # Function
Pin # Function Pin # Function Pin # Function Pin # Function Pin # Function
A1
A2
A3
A4
A5
A6
A7
A8
A9
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
GND
GND
VOUT2
VOUT2
B1
B2
B3
B4
B5
B6
B7
B8
B9
VOUT1
VOUT1
VOUT1
VOUT1
VOUT1
GND
GND
VOUT2
VOUT2
C1
C2
C3
C4
C5
C6
C7
C8
C9
VOUT1
VOUT1
VOUT1
VOUT1
VS1P
FSET1
VS2N
VS2P
VOUT2
D1
D2
D3
D4
D5
D6
D7
D8
D9
GND
GND
GND
GND
FB1
VS1N
FB2
SS2
GND
E1
E2
E3
E4
E5
E6
E7
E8
E9
GND
GND
GND
GND
SS1
NC1
FSET2
VSOUT
NC4
F1
F2
F3
F4
F5
F6
F7
F8
F9
GND
GND
GND
MODE
EN1
GND
GND
VSOUT
EN2
A10
VOUT2
B10
VOUT2
C10
VOUT2
D10
GND
E10
GND
F10
GND
A11
A12
VOUT2
VOUT2
B11
B12
VOUT2
VOUT2
C11
C12
VOUT2
VOUT2
D11
D12
GND
GND
E11
E12
GND
GND
F11
F12
GND
GND
Table 2: Pins G1–M12
Pin # Function
Pin # Function Pin # Function Pin # Function Pin # Function Pin # Function
G1
G2
G3
G4
G5
G6
G7
G8
G9
G10
G11
G12
H1
H2
H3
H4
H5
H6
H7
H8
H9
H10
H11
H12
GND
SW1
GND
RAMP2
RAMP1
PMODE
GND
PG2
PG1
GND
SW2
GND
GND
GND
GND
GND
GND
GND
GND
VCC
GND
GND
GND
GND
J1
J2
J3
J4
J5
J6
J7
J8
J9
J10
J11
J12
GND
VIN
VIN
VIN
GND
NC2
NC3
GND
VIN
VIN
VIN
GND
K1
K2
K3
K4
K5
K6
K7
K8
K9
K10
K11
K12
GND
VIN
VIN
VIN
GND
GND
GND
GND
VIN
VIN
VIN
GND
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
GND
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
GND
MPM3690-50 Rev. 1.0
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M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
GND
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
GND
5
MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
ABSOLUTE MAXIMUM RATINGS (1)
Supply voltage (VIN) ..................................... 18V
VSW1/2 (DC) ................................-0.3 V to +18.3V
VCC ............................................................ 4.5V
VCC (1s) (3)...................................................... 6V
All other pins ................................-0.3V to +4.3V
All other pins (1s) (3) ....................................... 6V
Continuous power dissipation (TA = 25°C) (2)
............................................................... 18.59W
Junction temperature ................................170°C
Lead temperature .....................................260°C
Storage temperature ................ -65°C to +170°C
Recommended Operating Conditions (3)
Supply voltage (VIN) ............................ 4V to 16V
Output voltage (VOUT) ...................... 0.6V to 1.8V
Operating junction temp (TJ) .... -40°C to +125°C
θJA
θJC
EVM3690-50B-BF-00A ..........7.8 ..... 4.1 .. °C/W
Thermal Resistance (4)
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature, TJ (MAX), the junction-toambient thermal resistance, θJA, and the ambient temperature,
TA. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by PD (MAX) = (TJ
(MAX) - TA) / θJA. Exceeding the maximum allowable power
dissipation can produce an excessive die temperature, and the
device may go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device is not guaranteed to function outside of its operating
conditions.
4) Measured
on
EVM3690-50B-BF-00A,
4-layer
PCB,
10cmx10cm.
MPM3690-50 Rev. 1.0
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
ELECTRICAL CHARACTERISTICS
VIN = 12V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Symbol
Condition
Min
Typ
Max
Units
EN = 0V, FB = 0.65V,
RFREQ = 30kΩ to GND
1.5
2
mA
Individual phase current limit，
fSW = 800kHz, VOUT = 1.2V
24
A
-13
A
800
50
220
kHz
ns
ns
VIN Supply Current
Supply current (quiescent)
IIN
Output Current Limit
Output current limit (inductor
valley)
ILIM_VALLEY
Low-side negative current
ILIM_NEG
Individual phase current limit
limit
Frequency and Timer
Switching frequency
fSW
RFREQ = 30kΩ
(5)
Minimum on time
tON_MIN
fSW = 800kHz, VOUT = 0.6V
(5)
Minimum off time
tOFF_MIN
Output Over-Voltage and Under-Voltage Protection
OVP threshold
VOVP
UVP threshold
VUVP
EN
Input high voltage
VIH_EN
Input low voltage
VIL_EN
116%
70%
120%
74%
124%
79%
2.15
VREF
VREF
V
1.20
V
Feedback Voltage
594
600
606
mV
15
20
25
μA
VFB = 0.65V
50
100
nA
TJ = 25°C
60
120
Ω
Feedback accuracy
Soft Start
Soft-start current
Error Amplifier
Feedback current
Soft Shutdown
Soft shutdown discharge
FET
UVLO
VCC under-voltage lockout
rising threshold
VCC under-voltage lockout
falling threshold
VCC output voltage
Power Good (PG)
Power good high threshold
Power good low threshold
Power good sink current
capability
Power good leakage current
ISS
IFB
RON_DISCH
VCCVTH_RISE
2.6
2.75
2.9
V
VCCVTH_FALL
2.3
2.45
2.6
V
VCC
3.1
3.25
3.4
V
88.5%
116%
70%
92.5%
120%
74%
96.5%
124%
78%
VREF
VREF
VREF
0.3
V
2.5
µA
PGVTH_HI_RISE FB from low to high
PGVTH_LO_RISE FB from low to high
PGVTH_LO_FALL FB from high to low
VPG
IPG_LEAK
IPG = 10mA
VPG = 3V, TJ = 25°C
1.5
MPM3690-50 Rev. 1.0
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5/24/2021
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
ELECTRICAL CHARACTERISTICS (continued)
VIN = 12V, TJ = -40°C to +125°C, unless otherwise noted.
Parameters
Symbol Condition
VOL_100
Power good low-level output
voltage
VOL_10
Thermal Protection
Thermal shutdown threshold (5)
Thermal hysteresis threshold (5)
VIN = 0V, pull PG up to 3.3V
through a 100kΩ resistor,
TJ = 25°C
VIN = 0V, pull PG up to 3.3V
through a 10kΩ resistor,
TJ = 25°C
Min
Typ
Max
600
720
Units
mV
700
820
160
30
°C
°C
Note:
5) Guaranteed by sample characterization. Not tested in production. The parameter is tested during parameters characterization.
MPM3690-50 Rev. 1.0
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5/24/2021
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© 2021 MPS. All Rights Reserved.
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL PERFORMANCE CHARACTERISTICS
MPM3690-50A, VIN = 12V, VOUT1 = VOUT2 = 1.2V, COUT1 = COUT2 = 690µF, fSW1 = fSW2 = 500kHz, FCCM,
TA = 25°C, unless otherwise noted.
Line Regulation
One channel
0.2
IOUT=0A
REGULATION (%)
0.15
IOUT=12.5A
0.1
IOUT=25A
0.05
0
-0.05
-0.1
-0.15
-0.2
4
8
12
INPUT VOLTAGE (V)
16
MPM3690-50 Rev. 1.0
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
MPM3690-50A, VIN = 12V, VOUT1 = VOUT2 = 1.2V, COUT1 = COUT2 = 690µF, fSW1 = fSW2 = 500kHz, FCCM,
TA = 25°C, unless otherwise noted.
Ripple
Ripple
IOUT1 = IOUT2 =0A
IOUT1 = IOUT2 =25A
CH1:
VOUT1/AC
CH1:
VOUT1/AC
CH2:
CH2:
VOUT2/AC
VOUT2/AC
Start-Up through VIN
Start-Up through VIN
IOUT1 = IOUT2 = 0A
IOUT1 = IOUT2 = 25A
CH1: VOUT1
CH1: VOUT1
CH2: VOUT2
CH2: VOUT2
CH3: VIN
CH3: VIN
R1: IOUT1
R1: IOUT1
CH4: IOUT2
CH4: IOUT2
Shutdown through VIN
Shutdown through VIN
IOUT1 = IOUT2 = 0A
IOUT1 = IOUT2 = 25A
CH1: VOUT1
CH1: VOUT1
CH2: VOUT2
CH2: VOUT2
CH3: VIN
CH3: VIN
R1: IOUT1
R1: IOUT1
CH4: IOUT2
CH4: IOUT2
MPM3690-50 Rev. 1.0
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5/24/2021
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© 2021 MPS. All Rights Reserved.
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
MPM3690-50A, VIN = 12V, VOUT1 = VOUT2 = 1.2V, COUT1 = COUT2 = 690µF, fSW1 = fSW2 = 500kHz, FCCM,
TA = 25°C, unless otherwise noted.
Start-Up through EN
Start-Up through EN
IOUT1 = 0A
IOUT1 = 25A
CH1: VOUT1
CH1: VOUT1
CH2: VEN1
CH2: VEN1
CH3: VPG1
CH3: VPG1
CH4: IOUT1
CH4: IOUT1
Shutdown through EN
Shutdown through EN
IOUT1 = 0A
IOUT1 = 25A
CH1: VOUT1
CH1: VOUT1
CH2: VEN1
CH2: VEN1
CH3: VPG1
CH3: VPG1
CH4: IOUT1
CH4: IOUT1
SCP Entry
SCP Recovery
IOUT1 = 0A
IOUT1 = 0A
CH1: VOUT1
CH1: VOUT1
CH2: VIN
CH2: VIN
CH3: VPG1
CH3: VPG1
CH4: IOUT1
CH4: IOUT1
MPM3690-50 Rev. 1.0
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5/24/2021
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
MPM3690-50A, VIN = 12V, VOUT1 = VOUT2 = 1.2V, COUT1 = COUT2 = 690µF, fSW1 = fSW2 = 500kHz, FCCM,
TA = 25°C, unless otherwise noted.
SCP Entry
SCP Recovery
IOUT1 = 25A
IOUT1 = 25A
CH1: VOUT1
CH1: VOUT1
CH2: VIN
CH2: VIN
CH3: VPG1
CH3: VPG1
CH4: IOUT1
CH4: IOUT1
Load Transient
6.25A load step, 10A/µs, COUT = 10 x 47µF
ceramic + 220µF POSCAP, CFF = 33nF,
low ramp
SCP Steady State
CH1:
VOUT1/AC
CH1: VOUT1
CH2: VIN
CH3: VPG1
CH4: IOUT1
CH4: IOUT1
Load Transient
12.5A Load Step, 10A/µs, COUT = 10 x 47µF
ceramic + 220µF POSCAP, CFF = 33nF,
high ramp
CH1:
VOUT1/AC
CH4: IOUT1
MPM3690-50 Rev. 1.0
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
MPM3690-50B, VIN = 12V, VOUT = 1.2V, COUT = 1380µF, fSW = 500kHz, FCCM, TA = 25°C, unless
otherwise noted.
Thermal Derating
VIN = 12V，1m/s with air flow
MAX LOAD CURRENT (A)
60
50
40
30
20
VOUT=1.8V, FSW=600K
VOUT=1.2V, FSW=500K
VOUT=0.8V, FSW=400K
10
0
30
40 50 60 70 80 90 100
AMBIENT TEMPERATURE (℃)
MPM3690-50 Rev. 1.0
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13
MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
MPM3690-50B, VIN = 12V, VOUT = 1.2V, COUT = 1380µF, fSW = 500kHz, FCCM, TA = 25°C, unless
otherwise noted.
Ripple
Ripple
IOUT = 0A, COUT = 20 x 47µF ceramic + 2 x
220µF POSCAP
IOUT = 50A, COUT = 20 x 47µF ceramic + 2 x
220µF POSCAP
CH1:
VOUT/AC
CH1:
VOUT/AC
CH2: VIN
CH2: VIN
CH3: VPG
CH3: VPG
CH4: IOUT
CH4: IOUT
Start-Up through VIN
Start-Up through VIN
IOUT = 0A
IOUT = 50A
CH1: VOUT
CH1: VOUT
CH2: VIN
CH2: VIN
CH3: VPG
CH3: VPG
CH4: IOUT
CH4: IOUT
Shutdown through VIN
Shutdown through VIN
IOUT = 0A
IOUT = 50A
CH1: VOUT
CH1: VOUT
CH2: VIN
CH2: VIN
CH3: VPG
CH3: VPG
CH4: IOUT
CH4: IOUT
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
MPM3690-50B, VIN = 12V, VOUT = 1.2V, COUT = 1380µF, fSW = 500kHz, FCCM, TA = 25°C, unless
otherwise noted.
Start-Up through EN
Start-Up through EN
IOUT = 0A
IOUT = 50A
CH1: VOUT
CH1: VOUT
CH2: VEN
CH2: VEN
CH3: VPG
CH3: VPG
CH4: IOUT
CH4: IOUT
Shutdown through EN
Shutdown through EN
IOUT = 0A
IOUT = 50A
CH1: VOUT
CH1: VOUT
CH2: VEN
CH2: VEN
CH3: VPG
CH3: VPG
CH4: IOUT
CH4: IOUT
SCP Entry
SCP Recovery
IOUT = 0A
IOUT = 0A
CH1: VOUT
CH1: VOUT
CH2: VIN
CH2: VIN
CH3: VPG
CH3: VPG
CH4: IOUT
CH4: IOUT
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
MPM3690-50B, VIN = 12V, VOUT = 1.2V, COUT = 1380µF, fSW = 500kHz, FCCM, TA = 25°C, unless
otherwise noted.
SCP Entry
SCP Recovery
IOUT = 50A
IOUT = 50A
CH1: VOUT
CH1: VOUT
CH2: VIN
CH2: VIN
CH3: VPG
CH3: VPG
CH4: IOUT
CH4: IOUT
Load Transient
12.5A load step, 10A/µs, COUT = 20 x 47µF
ceramic + 2 x 220µF POSCAP, CFF = 33nF,
low ramp
SCP Steady State
CH1:
VOUT/AC
CH1: VOUT
CH2: VIN
CH3: VPG
CH4: IOUT
CH4: IOUT
Load Transient
25A load step, 10A/µs, COUT = 20 x 47µF
ceramic +2 x 220µF POSCAP, CFF = 33nF,
high ramp
CH1:
VOUT/AC
CH4: IOUT
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
FUNCTIONAL BLOCK DIAGRAMS
0Ω
VCC
VCC
11kΩ
11kΩ
0.1µF
BST1
1µF
VIN
VIN
4V to 16V
VOUT1
VOUT1
1.0V/25A
1µF + 2 x
0.1µF
2.2Ω TK_MST
VDRV1
0.22µH
1µF
RAMP1
SW1
GND
PG1
VS1N
EN1
FB1 90.9kΩ
Power
Control
MODE
60.4kΩ
VS1P
FSET1
PMODE
PASS_MST
SS1
ILIM1
SET1
AGND
PGND
ISUM1
75kΩ
0Ω
11kΩ
0.1µF
VCC
BST2
1µF
11kΩ
TK_SLV
1µF+ 2 x
0.1µF
VDRV2
0.22µH
2.2Ω
RAMP2
VIN
VOUT2
VOUT2
1.0V/25A
SW2
GND
PG2
VS2N
EN2
FB2 90.9kΩ
Power
Control
MODE
60.4kΩ
VSOUT
VS2P
PMODE
FSET2
PASS_SLV
SS2
SET2
ILIM2
AGND
PGND
ISUM2
75kΩ
Figure 2: MPM3690-50A Functional Block Diagram
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
FUNCTIONAL BLOCK DIAGRAMS (continued)
0Ω
VCC
VCC
11kΩ
11kΩ
2.2Ω
0.1µF
BST1
1µF
TK_MST
1µF + 2 x
0.1µF
VDRV1
0.22µH
VIN
4V to 16V
VIN
VOUT
1.0V/50A
VOUT1
1µF
RAMP1
SW1
GND
PG1
EN1
VS1N
FB1
Power
Control
MODE
60.4kΩ
PMODE
90.9kΩ
VS1P
FSET1
PASS_MST
SS1
ILIM1
SET1
AGND
PGND
ISUM1
75kΩ
0Ω
VCC
11kΩ 2.2Ω
0.1µF
BST2
1µF
TK_SLV
1µF + 2 x
0.1µF
VDRV2
0.22µH
VIN
VOUT2
RAMP2
SW2
PG2
GND
VS2N
EN2
FB2
Power
Control
MODE
60.4kΩ
VSOUT
VS2P
PMODE
FSET2
PASS_SLV
SS2
SET2
ILIM2
AGND
PGND
ISUM2
75kΩ
Figure 3: MPM3690-50B Functional Block Diagram
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
OPERATION
Constant-On-Time (COT) Operation
The MPM3690-50 is a dual 25A or single 50A
output power module that integrates two
inductors and two monolithic power ICs. The
MPM3690-50 utilizes constant-on-time (COT)
control to provide a fast transient response.
Multi-Phase Operation
The
MPM3690-50B
adopts
multi-phase
constant-on-time (MCOT) control. MCOT control
configures the two ICs for master and slave
functionality. The slew rate of the supply voltage
(VIN) during start-up must be greater than 2V/ms
for MPM3690-50B.
MCOT Operation (Master)
The master phase performs the following
functions:
Generates the SET signals.
Manages start-up, shutdown, and all
protections.
Monitors for any fault alerts from the slave
phases through the PG pin.
Starts the first on pulse.
Starts the on pulse when receiving RUN and
SET signals.
Determines the on pulse width of its own
phase based on the per-phase and total
current.
Sends the PASS/TAKE signal.
MCOT Operation (Slave)
The slave phase performs
functions:
the
following
Takes the SET signal from the master.
Sends over-voltage (OV), under-voltage
(UV), and over-temperature (OT) alerts to
the master through the PG pin.
Starts the on pulse when receiving RUN and
SET signals.
Determines the on pulse width of its own
phase based on the per-phase and total
current.
Sends the PASS/TAKE signal.
MCOT control enables the MPM3690-50B to
respond to a load step transient much faster than
traditional current mode control schemes. When
a load step occurs, the FB signal is below the
internal reference; therefore, the SET signal is
generated more frequently than it would be
during steady state to respond to the load
transient. Depending on the load transient step
size and slew rate, the SET signal can be
generated with a minimum 50ns interval (i.e., the
next phase can be turned on as fast as 50ns after
the previous phase to provide ultra-fast load
transient response).
RAMP Compensation
The MPM3690-50 provides internal RAMP
compensation to support various types of output
capacitors. The ramp value is selected with the
RAMP pin. Float the RAMP pin for large ramp
compensation, or connect the RAMP pin to
ground for small ramp compensation. The RAMP
signal is superimposed onto the FB signal. When
the superimposed RAMP + FB signal reaches
the internal reference signal, the MPM3690-50
generates a new SET signal (which generates a
PWM on pulse). A larger ramp value reduces
system jitter, but slows the load transient
response. The ramp value should be selected
based on the application and design target.
Mode Selection
The MPM3690-50
only supports forced
continuous conduction mode (FCCM) operation.
FCCM can be enabled by setting the MODE pin
to logic high.
Soft Start
The MPM3690-50A features an adjustable softstart time (tSS) for both output channels. The soft
start time can be configured by connecting a
soft-start capacitor (CSS) between the SS pins
and GND. The soft-start time can be calculated
with Equation (1):
t ss (ms) 30 CSS (F)
(1)
Switching Frequency
The MPM3690-50A features an adjustable
switching frequency (fSW) for both output
channels. For the MPM3690-50B, the frequency
resistance (RFREQ) for both channels must be the
same.
The switching frequency (fSW) can be configured
by connecting a resistor between the FREQ pin
and GND. fSW can be calculated with Equation
(2):
MPM3690-50 Rev. 1.0
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
fsw (MHz)
24
RT (k)
(2)
Output Voltage Discharge
When the MPM3690-50 is disabled through EN,
it enables output voltage (VOUT) discharge. Both
the high-side MOSFET (HS-FET) and the lowside MOSFET (LS-FET) are latched off. A
discharge MOSFET connected between SW and
GND turns on to discharge VOUT. The typical on
resistance of this MOSFET is about 50Ω. Once
the FB voltage (VFB) drops below 10% of the
reference voltage (VREF), the discharge MOSFET
turns off.
Protection MODE Selection
The MPM3690-50 includes a protection MODE
selection function. If the PMODE pin is pulled
high, then the MPM3690-50 enters hiccup mode
when over-current protection (OCP), overvoltage protection (OVP), or over-temperature
protection (OTP) is triggered. If PMODE is pulled
down to GND, then the MPM3690-50 latches off
when OCP, OVP, or OTP is triggered.
The MPM3690-50 has over-temperature
protection (OTP). The IC internally monitors the
junction temperature. If the junction temperature
exceeds 160°C, the converter shuts off.
After OTP is triggered, the MPM3690-50 either
enters hiccup mode or latches off. If the device
latches off, cycle the power on VCC or EN to
enable the part again.
Feedback Circuit
Connect a resistor between FB1 and VS1N and
another between FB2 and VS2N to set the
output voltages for the MPM3690-50A. For the
MPM3690-50B, connect a resistor between FB1
to VS1N to set the output voltage, and tie FB1 to
FB2. Connect a 60.4kΩ resistor between FB1
and VS1P and another between FB2 and VS2P.
Figure 4 shows the block diagram.
Reference
EAMP
VOUT
To PWM
VS1P
FB
60.4kΩ
FB1
COUT
RFB2
Inductor Valley Over-Current Protection
(OCP)
The MPM3690-50 features on-die current sense.
When the LS-FET is on, the switching current
(inductor current) is sensed and monitored cycle
by cycle. When VFB drops below VREF, the HSFET can only turn on whenever there is no overcurrent (OC) condition detected during the LSFET on period. This means that the inductor
current is limited cycle by cycle. If an OC
condition is detected for 31 consecutive cycles,
OCP is triggered. If VOUT drops below the undervoltage protection (UVP) threshold during an OC
condition or output short-circuit condition, the
part enters OCP immediately.
Once OCP is triggered, the MPM3690-50 either
enters hiccup mode or latches off, depending on
the PMODE pin setting. If the device latches off,
cycle the power on VCC or VIN to enable the part
again.
Negative Inductor Current Limit
If the LS-FET detects a negative current below
-13A, the LS-FET turns off for a set time to limit
the negative current.
Over-Temperature Protection (OTP)
VS1N
Figure 4: Feedback Circuit of MPM3690-50
VOUT can be calculated with Equation (3):
VOUT VREF (1
RFB1
)
RFB2
(3)
Where VREF is the reference voltage (0.6V), and
RFB1 = 60.4kΩ.
Power Good (PG)
The MPM3690-50 has a power good (PG) output
for each channel. The PG pin is the open drain
of a MOSFET. Connect it to VCC or an external
voltage source that is below 3.6V through a pullup resistor (typically 100kΩ). After applying the
input voltage (VIN), the MOSFET turns on so that
the PG pin is pulled to GND before soft start (SS)
is ready. After VFB reaches the threshold, the PG
pin is pulled high after a delay.
When the converter encounters any fault (e.g.
UV, OV, OT, or UVLO), the PG pin is latched low.
After PG is latched low, it cannot be pulled high
again until a new SS is initialized. If the input
supply fails to power the MPM3690-50, PG is
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
clamped low, even though it is tied to an external
DC source through a pull-up resistor. Figure 5
shows the relationship between the PG voltage
(VPG) and the pull-up current (IPG).
2
1.8
1.6
IPG ( mA)
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0.6
0.65
0.7
0.75
0.8
0.85
0.9
VPG (V)
Figure 5: PG Current vs. PG Voltage
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
APPLICATION INFORMATION
Selecting the Input Capacitor
The step-down converter has a discontinuous
input current, and requires a capacitor to supply
the AC current to the converter while maintaining
the DC input voltage. Use ceramic capacitors for
best performance. Place the input capacitors as
close to the VIN pin as possible.
The capacitance can vary significantly with
temperature. Capacitors with X5R and X7R
ceramic dielectrics are recommended because
they are fairly stable across a wide temperature
range.
The capacitors must also have a ripple current
rating that exceeds the converter’s maximum
input ripple current. Estimate the input ripple
current with Equation (4):
ICIN IOUT
VOUT
V
(1 OUT )
VIN
VIN
(4)
The worst-case condition occurs at VIN = 2 x VOUT,
calculated with Equation (5):
ICIN
IOUT
2
(5)
For simplification, choose an input capacitor with
an RMS current rating that exceeds half the
maximum load current.
The input capacitance determines the converter
input voltage ripple. Select a capacitor that
meets any input voltage ripple requirements.
Estimate the input voltage ripple (∆VIN) with
Equation (6):
VIN
IOUT
V
V
OUT (1 OUT )
fSW CIN VIN
VIN
The worst-case condition occurs at VIN = 2 x VOUT,
calculated with Equation 7:
VIN
IOUT
1
4 fSW CIN
(7)
Selecting the Output Capacitor
The output capacitor maintains the DC output
voltage. The output voltage ripple can be
estimated with Equation (8):
VOUT
VOUT
V
1
(1 OUT ) (RESR
) (8)
fSW L
VIN
8 fSW COUT
When using ceramic capacitors, the capacitance
dominates the impedance at the switching
frequency and causes majority of the output
voltage. For simplification, calculate the output
voltage ripple (∆VOUT) with Equation (9):
VOUT
VOUT
V
(1 OUT )
2
8 fSW L COUT
VIN
(9)
When using capacitors with a larger ESR (e.g.
POSCAP, OSCON), the ESR dominates the
impedance at the switching frequency. The
output voltage ripple is determined by the ESR.
For simplification, the output voltage ripple can
be estimated with Equation (10):
VOUT
VOUT
V
(1 OUT ) RESR
fSW L
VIN
(10)
Low VIN Applications
For low VIN applications (3V < VIN < 4V), an
external VCC bias power supply is needed. The
external bias VCC must be above 2.9V (the VCC
UVLO rising threshold maximum value).
(6)
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MPM3690-50A/B, 16V, DUAL 25A OR SINGLE 50A POWER MODULE
PCB Layout Guidelines
VIN
Place sufficient decoupling capacitors as close
as possible to the VIN and GND pins. Sufficient
GND vias should be placed around the GND pad
of the decoupling capacitors. Avoid placing
sensitive signal traces close to the input copper
plane and/or vias without sufficient ground
shielding. A minimum of four 22µF/25V ceramic
capacitors are recommended at the input
channel to provide sufficient decoupling.
50B, combine all the corresponding VOUT
copper planes.
GND
Connect all GND pins of the module on a copper
plane. Place sufficient vias close to the GND pins
to provide a current return path with minimal
thermal resistance and parasitic impedance.
VSxP and VSxN
For the MPM3690-50A, route each pair of
VSxP/N pins as differential signals. For the
MPM3690-50B, connect FB1 to FB2, then
connect all of the VSxN pins. Avoid routing
VSxP/N traces close to the input plane and highspeed signals.
VOUTx
Each VOUTx pin should be connected together
on a copper plane. Place sufficient vias near the
VOUTx pads to provide a current path with
minimal parasitic impedance. For the MPM3690-
VIN
CIN1
CIN3
CIN2
CIN4
VIN
VIN
NC2
NC3
VCC
SW1
PG2
RAMP2 RAMP1 PMODE
MODE
GND
EN1
GND
VSOUT EN2
VSOUT NC4
SS1
NC1
fSET2
FB1
VS1N
FB2
SS2
VS1P
fSET1
VS2N
VS2P
VOUT1
SW2
GND
CO3
CO1
CO2
PG1
GND
CO4
VOUT2
Figure 6: Recommended PCB Layout
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL APPLICATION CIRCUITS
10kΩ
4V to 16V
Input
VIN
VCC
MODE
CIN
VOUT1
VS1P
FB1
EN1
EN2
EN1
EN2
VOUT1 =
1.2V/25A
COUT
60.4kΩ
VS1N
VOUT2 =
0.9V/25A
MPM3690-50A
CSS1
RFB1
VOUT2
CSS2
VS2P
FB2
RF1
RFB2
COUT
121kΩ
VS2N
RF2
Figure 7: Typical Application Circuit (Dual-Output Operation, 1.2V and 0.9V at 25A with Remote Sense
for Both Outputs)
10kΩ
4V to 16V
Input
VIN
MODE
VCC
CIN
EN1
EN2
EN1
EN2
VOUT1 =
1.2V/25A
VOUT1
VS1P
FB1
RFB1
VS1N
60.4kΩ
MPM3690-50A
CSS1
VOUT2
COUT
VOUT2 =
0.9V/25A
CSS2
COUT
VS2P
FB2
VS2N
RF1
RFB2
121kΩ
RF2
Figure 8: Typical Application Circuit (Dual-Output Operation, 1.2V and 0.9V at 25A with Remote Sense
Disabled)
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
TYPICAL APPLICATION CIRCUITS (continued)
10kΩ
4V to 16V
Input
VIN
VCC
MODE
CIN
VOUT =
1.2V/50A
VOUT1
VS1P
FB1
EN1
EN2
EN
PG
RFB
COUT
60.4kΩ
VS1N
MPM3690-50B
VOUT2
CSS1
COUT
VS2P
FB2
RF
RF
VS2N
Figure 9: Typical Application Circuit (Interleaved Operation, 1.2V at 50A with Remote Sense)
10kΩ
4V to 16V
Input
VIN
MODE
VCC
CIN
VOUT =
1.2V/50A
VOUT1
VS1P
FB1
EN1
EN2
EN
PG
VS1N
COUT
RFB
60.4kΩ
MPM3690-50B
VOUT2
CSS1
VS2P
COUT
FB2
RF1
RF2
VS2N
Figure 10: Typical Application Circuit (Interleaved Operation, 1.2V at 50A without Remote Sense)
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
PACKAGE INFORMATION
BGA (16mmx16mmx5.18mm)
MPM3690-50 Rev. 1.0
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
CARRIER INFORMATION
1
Pin1
1
ABCD
1
1
ABCD
ABCD
ABCD
Feed Direction
Part Number
Package Description
Quantity/
Reel
Quantity/
Tray
Quantity/
Tube
Reel
Diameter
Carrier
Tape
Width
Carrier
Tape
Pitch
MPM3690GBF50A
MPM3690GBF50B
BGA
(16mmx16mmx5.18mm)
N/A
90
N/A
N/A
N/A
N/A
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MPM3690-50A/B – 16V, DUAL 25A OR SINGLE 50A POWER MODULE
REVISION HISTORY
Revision #
1.0
Revision Date
5/24/2021
Description
Initial Release
Pages Updated
-
Notice: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third-party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
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