Ordering number : ENA1849
Bi-CMOS IC
LV5990M
Overview
Low power consumption and high efficiency
Step-down Switching Regulator
LV5990M is 1ch DC-DC converter with built-in power Pch MOS transistor. The recommended operating range is 4.5V to
18V. The maximum current is 3A. The operating current is about 90
μA,
and low power consumption is achieved.
Functions
•
1ch SBD rectification DC-DC converter IC with built-in power Pch MOS transistor
•
Maximum value of light load mode current is 90
μA.
•
Built-in OCP circuit with P-by-P method
•
When P-by-P is generated continuously, it shifts to the HICCUP operation.
•
If connect C-HICCUP to GND pin, then latch-off when over current.
•
The oscillatory frequency is 360kHz.
•
UVLO and built-in TSD
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Input voltage
Allowable pin voltage
Symbol
VIN-max
SW
EN, PG
PDR
REF
SS,FB,COMP
C-HICCUP
Allowable power dissipation
Operating temperature
Storage temperature
Pd max
Topr
Tstg
specified substrate *
1.05
-40 to 85
-55 to 150
W
°C
°C
Conditions
Ratings
22
30
VIN
VIN -6
6
REF
Unit
V
V
V
V
V
V
* Specified board: 40.0mm
×
30.0mm
×1.6mm,
glass epoxy.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer
'
s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer
'
s products or
equipment.
O1310 SY 20100929-S00006 No.A1849-1/6
LV5990M
Recommended Operating Conditions
at Ta = 25°C
Parameter
Input voltage renge
VIN
Symbol
Conditions
Ratings
4.5 to 18
Unit
V
Electrical Characteristics
at Ta
=
25°C, VIN = 15V
Parameter
Reference voltage
Internal reference voltage
Pch drive voltage
Saw wave oscillator
Oscillatory frequency
ON/OFF circuit
IC startup voltage (EN pin)
Disable voltage (EN pin)
Soft start circuit
Soft start source current
Soft start sink current
UVLO circuit
UVLO release voltage
UVLO lock voltage
Error amplifier
Input bias current
Error amplifier gain
Output sink current
Output source current
Over current limit circuit
Current limit peak
HICCUP timer start-up cycle
HICCUP comparator threshold voltage
HICCUP timer charge current
PWM comparator
Maximum on-duty
Logic output
Power good “L” sink current
Power good “H” leakage current
Power good threshold FB voltage
Power good hysteresis
Power good impedance
Output
Output on-resistance
The entire device
Standby current
Light load mode consumption current
Thermal shutdown
*: Design certification
ICCS
Isleep1
TSD
EN<0.3V
EN>1.5V, ILOAD=0, No oscillatory
-20°C≤Ta≤70°C *
*
170
°C
50
70
1
90
μA
μA
RON
IO=1A
150
mΩ
Ipwrgd_L
Ipwrgd_H
VtPG
VPG_H
RPG
PG=5V
PG=5V
1.0
40
1.1
50
1
4
5
6
1
1.2
60
mA
μA
V
mV
kΩ
DMAX
95
%
ICL
NLCYCLES
VtHIC
IHIC
1.20
1
3.2
4.7
15
1.26
2
1.32
3
6.2
A
cycle
V
μA
IEA_IN
GEA
IEA_OSK
IEA_OSC
FB=1.75V
FB=0.75V
-100
100
-40
10
-50
250
-20
20
100
400
-10
40
nA
μA/V
μA
μA
VUVLON
VUVLOF
FB=COMP
FB=COMP
3.0
2.5
3.4
2.9
3.8
3.3
V
V
ISS_SC
ISS_SK
EN>1.5V
EN<0.3V, SS=0.4V
1.3
120
2
150
3
180
μA
μA
VCNT_ON
VCNT_OFF
1.5
VIN
0.3
V
V
FOSC
300
360
420
kHz
VREF
VPDR
IOUT=0 to -5mA
1.235
VCC-5.5
1.260
VCC-5.0
1.285
VCC-4.5
V
V
Symbol
Conditions
Ratings
min
typ
max
Unit
No.A1849-2/6
LV5990M
Pin Function
Pin No.
1
Pin name
SW
Function
High-side Pch MOSFET drain pin
Equivalent circuit
VIN
SW
2
PDR
Pch MOSFET gate drive voltage
The bypass capacitor is necessarily connected between this pin
and VIN.
VIN
PDR
GND
3
GND
Ground pin.
Ground pin voltage is reference voltage.
12
VIN
Supply voltage pin.
It is observed by the UVLO function. When its voltage becomes
3.4V or more. ICs startup in soft start.
5
C-HICCUP
It is capacitor connection pin for setting re-startup cycle in
HICCUP mode.
If connect it to GND pin, then latch-off when over current.
VIN
GND
VIN
C-HICCUP
GND
6
SS
Capacitor connection pin for soft start.
About 2μA current charges the soft start capacitor.
VIN
SS
GND
7
COMP
Error amplifier output pin.
The phase compensation network is connected between GND pin
and COMP pin.
VIN
COMP
GND
8
FB
Error amplifier reverse input pin.
ICs make its voltage keep 1.26V.
Output voltage is divided by external resistances and it across FB.
VIN
FB
GND
Continued on next page.
No.A1849-5/6
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