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BD95514MUV
Technical data
16 pgs395.44 Kb0

ROHM BD95514MUV Technical data

Hi-performance Regulator IC Series for PCs
FET Integrated Switching Regulator for DDR-SDRAM Cores
●Description
BD95514MUV is a switching regulator capable of supplying high current output (up to 4A) at low output voltages (0.7V~5.0V) over a broad range of input voltages (4.5V~28V). The regulator features an internal N-MOSFET power transistor for high efficiency and low space consumption, while incorporating ROHM’s proprietary H the industry’s fastest transient response time against load changes. SLLM (Simple Light Load Mode) technology is also integrated to improve efficiency when powering lighter loads, as well as soft start, variable frequency, short-circuit protection with timer latch, over-voltage protection, and REF tracking functions. This regulator is suited for PC applications.
●Features
1) I Internal low ON-resistance power N-MOSFET (typ:120m)
2) I Internal 5V linear voltage regulator (100mA)
3) Integrated H
4) Selectable Simple Light Load Mode (SLLM), Quiet Light Load Mode (QLLM) and forced continuous mode
5) Built-in thermal shutdown, low input, current overload, output over- and under-voltage protection circuitry
6) Soft start function to minimize rush current during startup
7) Adjustable switching frequency (f = 200 kHz ~ 1000 kHz:It changes depending on the setup condition.)
8) Built-in output discharge function
9) VQFN032V5050 power package
10) Tracking function
11) Internal bootstrap diode
●Applications
Mobile PCs, desktop PCs, LCD-TV, digital household electronics
3
RegTM DC/DC converter controller
3
Reg
TM
control mode technology, yielding
No.09030EBT16
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© 2009 ROHM Co., Ltd. All rights reserved.
1/15
2009.04 - Rev.B
BD95514MUV
Technical Note
●Absolute Maximum Ratings (Ta=25°C)
Parameter Symbol Value Unit Input Voltage 1 VCC 7 *1 V Input Voltage 2 VDD 7
*1
V Input Voltage 3 AVIN 30 *1 Input Voltage 4 VIN 30 *1 V External VCC Voltage EXTVCC 7 *1 V BOOT Voltage BOOT 35 V BOOT-SW Voltage BOOT-SW 7 *1 V Output Feedback Voltage FB VCC V SS/FS/MODE Voltage SS/FS/MODE VCC V VREG Voltage VREG VCC V EN/CTL Input Voltage EN/CTL 7 *1 V PGOOD Voltage PGOOD 7 *1 V Output Current (Average) Isw 4 *1 A Power Dissipation 1 Pd1 0.38*2 W Power Dissipation 2 Pd2 0.88 Power Dissipation 3 Pd3 2.06 Power Dissipation 4 Pd4 4.56
*3*6
W
*4*6
W
*5*6
W
Operating Temperature Range Topr -10～+100 °C Storage Temperature Range Tstg -55～+150 °C Junction Temperature Tjmax +150 °C
*1 Do not exceed Pd. *2 Ta≧25°C (IC only), power dissipated at 3.0mW / °C. *3 Ta≧25°C (single-layer board, 20.2 mm *4 Ta≧25°C (4-layer board, 10.29 mm *5 Ta≧25°C (4-layer board, all layers with 5505 mm *6 Values observed with chip backside soldered. When unsoldered, power dissipation is lower.
2
copper heat dissipation pad), power dissipated at 7.0mW / °C.
2
copper heat dissipation pad on top layer, 5505 mm2 pad on 2nd and 3rd layer), power dissipated at 16.5mW / °C.
2
copper heat dissipation pads), power dissipated at 36.5mW / °C.
●Operating Conditions (Ta=25°C)
Parameter Symbol Min Max Unit Input Voltage 1 VCC 4.5 5.5 V Input Voltage 2 VDD 4.5 5.5 V Input Voltage 3 AVIN 4.5 28 V Input Voltage 4 VIN 4.5 28 V External VCC Voltage EXTVCC 4.5 5.5 V BOOT Voltage BOOT 4.5 33 V SW Voltage SW -0.7 28 V BOOT-SW Voltage BOOT-SW 4.5 5.5 V MODE Input Voltage MODE 0 5.5 V EN/CTL Input Voltage EN/CTL 0 5.5 V PGOOD Voltage PGOOD 0 5.5 V Minimum On Time tonmin - 100 nsec
*This product is not designed for use in a radioactive environment.
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© 2009 ROHM Co., Ltd. All rights reserved.
2/15
2009.04 - Rev.B
BD95514MUV
●ELECTRICAL CHARACTERISTICS (unless otherwise noted, Ta=25℃, AVIN=12V, VCC=VDD=VREG, EN/CTL=5V, MODE=0V, RFS=180kΩ)
Parameter Symbol
[Whole Device block] AVIN bias current 1 IIN1 - 1300 2000 A AVIN bias current 2 IIN2 - 200 300 A EXTVCC=5V AVN standby current IINstb - 0 10 A CTL=EN＝0V EN Low voltage ENlow GND - 0.8 V EN High voltage ENhigh 2.3 - 5.5 V EN bias current IEN - 12 20 A CTL Low voltage CTLlow GND - 0.8 V CTL High voltage CTLhigh 2.3 - 5.5 V CTL bias current ICTL - 1 6 A [5V Linear regulator block ] VREG output voltage VREG 4.90 5.00 5.10 V AVIN=6.0 to 25VIREG=0 to 100mA Maximum current IREG 200 - - mA [5V switch block ] EXTVCC input threshold voltage EVCC_UVLO 4.2 4.4 4.6 V EXTVCC:Sweep up Switch resistance REVCC - 1.0 2.0 [Under Voltage Locked Out block ] AVIN threshold voltage AVIN_ UVLO 4.1 4.3 4.5 V VCC:Sweep up AVIN hysteresis voltage dAVIN_ UVLO 100 160 220 mV VCC:Sweep down VREG threshold voltage VREG_ UVLO 4.1 4.3 4.5 V VREG:Sweep up VREG hysteresis voltage dVREG_ UVLO 100 160 220 mV VREG:Sweep down [H3RegTM block] ON Time ton 400 500 600 nsec MAX ON Time tonmax 5.0 11.0 22.0 sec MIN OFF Time toffmin - 450 550 nsec [FET Driver block] High side ON resistance Ron_high - 120 200 m Low side ON resistance Ron_low - 120 200 m [SCP block] SCP startup voltage VSCP 0.420 0.490 0.560 V VFB:30%down Delay time tSCP 0.5 1 2 ms [OVP block] OVP setting voltage VOVP 0.800 0.840 0.880 V VFB:20%up Delay time tOVP 0.5 1 2 ms [Soft start block] Charge current Iss 1.4 2.2 3.0 A Standby voltage Vss_stb - - 100 mV [Current Limit block] High side FET output current limit IHOCP 4.5 6.0 7.5 A High peak detect Low side FET output current limit ILOCP 3.0 4.0 5.0 A Low peak detect [Output Voltage Sense block] Feedback pin voltage 1 VFB1 0.693 0.700 0.707 V Feedback pin voltage 2 VFB2 0.690 0.700 0.710 V Ta=-10℃ to 100℃,Iout=0A to 4A Feedback pin bias current IFB -100 0 100 nA [Mode block] SLLM VthSLLM VCC-0.5 - VCC V SLLM(Maximum LG offtime:∞) Forced continuous mode VthCONT GND - 0.5 V Continuous mode QLLM VthQLLM 2.5 3.0 3.5 V QLLM(Maximum LG offtime:40usec) Open voltage VMODE 1.5 - 3.0 V [Power Good block] VFB Power Good Low voltage VFB PL 0.605 0.630 0.655 V VFB:10%down VFB Power Good High voltage VFB PH 0.745 0.770 0.795 V VFB:10%up
Standard Value
MIN TYP MAX
Unit Condition
Technical Note
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© 2009 ROHM Co., Ltd. All rights reserved.
3/15
2009.04 - Rev.B
BD95514MUV
T
T
T
T
Technical Note
●Reference Data
100
[%]
SLLM
80
60
40
Continuous Mode
20
0
0.01 0.1 1 10
Fig.1 Io-Efficiency
IN=7V,VOUT=2.5V)
(V
Io [A]
(50mV/div)
VOU
2sec/div
SW
(10V/div)
IOUT
(2A/div)
Fig.4 Transient Response
IN=7V, VOUT=2.5V)
(V
(50mV/div)
VOU
2sec/div
SW
(10V/div)
IOUT
(2A/div)
Fig.7 Transient Response
IN=7V, VOUT=2.5V)
(V
200sec/div 2msec/div
EN
VOUT
2[V/div]
PGOOD PGOOD
Fig.10 PGOOD Rising
Waveform
100
SLLM SLLM
80
60
[%]
40
20
0
0. 01 0. 1 1 10
Continuous Mode
Io [A]
Fig.2 Io-Efficiency
(VIN=12V,VOUT=2.5V)
VOU
(50mV/div)
SW
(10V/div)
IOUT
(2A/div)
Fig.5 Transient Response
(VIN=12V, VOUT=2.5V)
VOUT
(50mV/div)
SW
(10V/div)
IOUT
(2A/div)
Fig.8 Transient Response
(V
IN=12V, VOUT=2.5V)
EN
OUT
V
2[V/div]
Fig.11 PGOOD Falling
Waveform
100
80
60
[%]
40
20
0
0.01 0.1 1 10
Continuous Mode
Io [A]
Fig.3 Io-Efficiency
(VIN=19V,VOUT=2.5V)
2sec/div 2sec/div
VOUT
(50mV/div)
SW
(10V/div)
IOUT
(2A/div)
Fig.6 Transient Response
IN=19V, VOUT=2.5V)
(V
2sec/div 2sec/div
VOU
(50mV/div)
SW
(10V/div)
IOUT
(2A/div)
Fig.9 Transient Response
(VIN=19V, VOUT=2.5V)
V
OUT
2[V/div]
SW
5[A/div]
I
L
200sec/div
Fig.12 SCP Timer Latch
Waveform
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© 2009 ROHM Co., Ltd. All rights reserved.
4/15
2009.04 - Rev.B
BD95514MUV
k
A
A
●Reference Data
EN
REG
V
2[V/div]
OUT
V
2[V/div]
SW
Fig.13 EN wake up
●Block Diagram
REG
V
EN
CTL
REF(0.7V)
PGOOD
FB
EXTV
10
8
17
6
18
CC
14
VREG
Reference
Block
400sec/div
13
VREF×0.85
V
SS×0.85
Power
Good
VCC
V
OUT
5V Reg
15
REG
AVIN
SS
VIN
REG
MODE
UVLO
ILIM SCP TSD
V
IN
OVP
Delay
EN
UVLOV
SCP
H3Reg
Controller
Bloc
11
VIN SS
7
ILIM
TM
REF×1.2
FB
Thermal
Protection
MODE
FS V
16
Soft Start
OCP
RSQ
912
MODE
OVP
TSD
MODE
GND MODE
Driver Circuit
EN/UVLO
SS
Technical Note
DD
V
HG
LG
5
1
2
3
4
26
27
28
29
30
31
21
22
23
24
25
32
20
19
BOOT
V
IN
SW
DD
V
PGND
CE
OUT
V
VREG
VIN(4.5～28V)
OUT
V
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© 2009 ROHM Co., Ltd. All rights reserved.
5/15
2009.04 - Rev.B
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