SANYO L88MS33T Datasheet
Ordering number: EN5516
Monolithic Linear IC
L88MS33T
3.3 V, 0.5 A Low Dropout Voltage Regulator
with On/Off Function
Overview
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.
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)
enables to save energy and miniaturize transformer size.
.
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
dissipation to be raised.
.
Enhanced mount flexibility with range of formed products.
.
On-chip protective circuitry (fold back short circuit, thermal
over load).
.
External noise suppression pin provided.
Package Dimensions
unit : mm
3103-TP-5H
[L88MS33T]
SANYO : TP-5H
Pin Assignment
Specifications
Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Input voltage V
Strobe pin input voltage V
Allowable power dissipation Pd max Ta % 25°C, no heat sink 1 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
max 18 V
IN
max VINmax V
ST
Tc = 25°C, with infinite heat sink 6.25 W
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
31097HA(II) No.5516-1/7
Top view
Operating Conditions atTa=25°C
Parameter Symbol Conditions Ratings Unit
Input voltage
Output current
Output on control voltage
Output off control voltage
V
l
OUT
V
V
IN
STL
STH
L88MS33T
4to17 V
0 to 500 mA
–0.3 to +0.8 V
2.0 to V
IN
V
Operating Characteristics at Tj = 25 °C, VIN= 6.3 V, IO= 500 mA, C
see specified Test Circuit.
Parameter Symbol Conditions min typ max Unit
[Output on, V
Output voltage V
Dropout voltage
Line regulation ∆V
Load regulation ∆V
Peak output current l
Output short-circuit current l
Quiescent current
Output noise voltage V
Temperature coefficient of
output voltage
Ripple rejection Rrej f = 120 Hz, 4.3 V % V
Output on control voltage V
[Output off, V
Low output voltage V
Static current I
Output off control voltage V
ST
ST
= ‘‘L’’]
= ‘‘H’’ ]
OUT
V
DROP1
V
DROP2lO
OLN
OLD
OP
OSC
I
Q1
I
Q2
NO
∆V
/∆Tj Tj = 25 to 125 °C ±0.4 mV/°C
OUT
STL
OFF VST= 5 V 20 200 mV
O
OFF VST= 5 V, Except I
Q
STH
= 150 mA 0.2 0.3 V
4V%VIN% 17 V 10 50 mV
5mA%I
I
= 0 1.9 5 mA
OUT
% 500 mA 24 80 mV
OUT
10 Hz % f % 100 kHz 30 µVrms
% 17 V 70 dB
IN
STB
= 100 µF, CIN, Cn=1µF,
OUT
3.2 3.3 3.4 V
0.4 0.6 V
600 900 mA
100 300 mA
24 50 mA
35 70 µA
2.0 V
0.8 V
IN
V
No.5516-2/7
Equivalent Circuit Block Diagram
Start-up circuit
Reference voltage
Test Circuit
Error
amp
L88MS33T
ON/OFF
Control
Thermal
protector
Short circuit
protector
Notes: 1. To ensure operational stability, CIN,C
2. Because the output capacitor C
OUT
, and Cn should be placed as close to the IC as possible.
OUT
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 V
is minus (–) and GND is plus (+) (reversed connection), excessive current flow will occur.
IN
No.5516-3/7
Loading...