SANYO L88MS33T

Ordering number: EN5516
Monolithic Linear IC
L88MS33T
3.3 V, 0.5 A Low Dropout Voltage Regulator
with On/Off Function
Overview
Package Dimensions
unit : mm
The L88MS33T is a low dropout voltage regulator with an
output voltage of 3.3 V (standard), with an on-chip on/off
function to maximize equipment power saving effectiveness.
Because it can operate with a low input-output voltage
difference, it contributes to smaller and more efficient set
power supplies, optimum for audio-visual and office
automation equipment.
3103-TP-5H
[L88MS33T]
Functions
. Output voltage: 3.3 V
. On/off control of output voltage by strobe pin (active low)
. 500 mA output current
Features
. Low minimum input-output voltage differential (0.4 V typ)
to save energy and miniaturize transformer size.
. enables
Quiescent current is low with output off.
. Set size can be miniaturized with compact TP-5H power
. package.
Surface mounting on board permits allowable power
to be raised.
. dissipation
Enhanced mount flexibility with range of formed products.
. On-chip protective circuitry (fold back short circuit, thermal
load).
. over
External noise suppression pin provided.
SANYO : TP-5H
Pin Assignment
Top view
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Input voltage
VIN max
Strobe pin input voltage
VST max
Allowable power dissipation
Pd max
Conditions
Ratings
Unit
18
Ta % 25°C, no heat sink
Tc = 25°C, with infinite heat sink
V
VIN max
V
1
W
6.25
W
Thermal resistance (junction-atmosphere)
θj-a
125
°C/W
Thermal resistance (junction-to-case)
θj-c
20
°C/W
Operating temperature
Topr
–20 to +85
°C
Storage temperature
Tstg
–55 to +150
°C
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31097HA(II) No.5516-1/7
L88MS33T
Operating Conditions at Ta = 25 °C
Parameter
Input voltage
Symbol
Conditions
Ratings
Unit
VIN
4 to 17
V
Output current
lOUT
0 to 500
mA
Output on control voltage
VSTL
–0.3 to +0.8
V
Output off control voltage
VSTH
2.0 to VIN
V
Operating Characteristics at Tj = 25 °C, VIN = 6.3 V, IO = 500 mA, COUT = 100 µF, CIN, Cn = 1 µF,
see specified Test Circuit.
Parameter
[Output on, VST = ‘‘L’’]
Output voltage
Dropout voltage
Line regulation
Load regulation
Peak output current
Output short-circuit current
Quiescent current
Output noise voltage
Temperature coefficient of
output voltage
Ripple rejection
Output on control voltage
[Output off, VST = ‘‘H’’ ]
Low output voltage
Static current
Output off control voltage
Symbol
VOUT
VDROP1
VDROP2
∆VOLN
∆VOLD
lOP
lOSC
IQ1
IQ2
VNO
∆VOUT/∆Tj
Rrej
VSTL
VO OFF
IQOFF
VSTH
Conditions
min
typ
max
Unit
3.2
3.4
0.6
0.3
50
80
10 Hz % f % 100 kHz
3.3
0.4
0.2
10
24
900
100
1.9
24
30
V
V
V
mV
mV
mA
mA
mA
mA
µVrms
Tj = 25 to 125 °C
±0.4
lO = 150 mA
4 V % VIN % 17 V
5 mA % IOUT % 500 mA
600
IOUT = 0
f = 120 Hz, 4.3 V % VIN % 17 V
300
5
50
mV/°C
70
VST = 5 V
VST = 5 V, Except ISTB
20
35
2.0
0.8
dB
V
200
70
VIN
mV
µA
V
No.5516-2/7
L88MS33T
Reference voltage
Start-up circuit
Equivalent Circuit Block Diagram
Error
amp
Short circuit
protector
ON/OFF
Control
Thermal
protector
Test Circuit
Notes: 1. To ensure operational stability, CIN, COUT, and Cn should be placed as close to the IC as possible.
2. Because the output capacitor COUT is set at over 100 µF to prevent oscillation at low temperatures, a capacitor that
exhibits little change in capacity with temperature variations should be used (such as a tantalum capacitor).
3. Adding capacitor Cn enables external noise suppression and ripple rejection to be improved. However, attention should
be given to system stability (phase margin).
4. When the strobe (STB) pin is open, output is turned on by internal bias. When the strobe function is not used, the STB
pin should be connected to GND to complete strobe operation.
5. When VIN is minus (–) and GND is plus (+) (reversed connection), excessive current flow will occur.
No.5516-3/7
L88MS33T
Function Table
VSTB
VOUT
L
H
H
L
On/off Control Input Equivalent Circuit
Control
signal
Sample Application Circuit
Adjustment of output voltage VOUT
(1) Reducing VOUT
VOUT can be lowered by externally connecting a resistor
RA between the Cn and VOUT pins.
(2) Increasing VOUT
VOUT can be raised by externally connecting a resistor RB
between the Cn and GND pins.
No.5516-4/7
L88MS33T
Allowable power dissipation, Pd max – W
Pd max – Ta
1)
With infinite heat sink
Mounted on copper-clad
area of 2,000 mm2
Mounted on copper-clad
area 740 mm2
Mounted on copper-clad
area 180 mm2
Mounted on copper-clad
area 36 mm2
No heat sink
Ambient temperature, Ta – °C
The allowable power dissipation is 1.0 W (Ta = 25°C) with no fin attached, but when mounted on a hybrid IC board or
printed circuit board, high allowable power dissipation is achieved, despite the compact package. The graph below depicts the
relationship between the copper-clad area and allowable power dissipation when mounted on a glass epoxy board
(50 × 5 0 × 0.8 mm3) with a copper thickness of 18 µm.
Allowable power dissipation, Pd max – W
Pd max – S
Board
Copper-clad area S
(mm2)
Copper-clad area, S – mm2
2)
3)
Pd is the value for when the solder on the surface of the IC heat sink has melted completely and the surface mount is
horizontal.
Please be advised that the flow solder application system (full-heat method) cannot be recommended.
Lead Formings
MA forming
LR forming
FA forming
No.5516-5/7
L88MS33T
VO – VIN
Output voltage, VO – V
Dropout voltage, VDROP – V
VDROP – IO
Output current, IO – A
VO – VST
Output voltage, VO – V
Output voltage, VO – V
Input voltage, VIN – V
VO – IO
Strobe voltage, VST – V
IQ – VIN
Input voltage, VIN – V
IQ OFF – VIN
(except IST)
Output current, IO – A
Quiescent current during strobe, IQ
Quiescent current, IQ – mA
OFF
Ambient temperature, Ta – °C
IQ – IO
– mA
Quiescent current, IQ – mA
Output off control voltage, VSTH – V
Output on control voltage, VSTL – V
Output current, IO – A
VSTH, VSTL – Ta
Input voltage, VIN – V
No.5516-6/7
L88MS33T
IQ – Ta
Ambient temperature, Ta – °C
Quiescent current during strobe, IQ
OFF
Peak output current, IOP – A
Output short-circuit current, IOSC – A
Ambient temperature, Ta – °C
IOP, IOSC – Ta
– µA
Output voltage, VO – V
Quiescent current, IQ – mA
VO – Ta
Ambient temperature, Ta – °C
IQ OFF (ST ON) – Ta
(except IST)
Ambient temperature, Ta – °C
Ripple rejection, Rrej – dB
Rrej – f
Cn = 1 µF
Cn = open
Frequency, f – Hz
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume
production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use
or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of March, 1997. Specifications and information herein are subject to change without notice.
No.5516-7/7