S-1142B33I-E6T1U Seiko Instruments, S-1142B33I-E6T1U Datasheet - Page 15

• Manufacturer Part Number: S-1142B33I-E6T1U
• Description: IC REG LDO 3.3V 0.2A HSOP6
• Manufacturer: Seiko Instruments

Specifications of S-1142B33I-E6T1U

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 50V
• Voltage - Dropout (typical): 0.72V @ 200mA
• Number Of Regulators: 1
• Current - Output: 200mA (Min)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 6-SOIC variation (0.154", 3.9mm), 4 Leads + 2 Fins
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Other names: 728-1062-2

Rev.2.0
Operation
1. Basic operation
2. Output transistor
Figure 11 shows a block diagram of the S-1142 Series.
The error amplifier compares the reference voltage (V
feedback resistors R
not influenced by the input voltage and temperature change to the output transistor.
In the S-1142 Series, a low on-resistance P-channel MOSFET is used as the output transistor.
Be sure that V
current which flows, because of a parasitic diode between the VIN and VOUT pins, when the potential of V
becomes higher than V
_00
OUT
VSS
VIN
HIGH-WITHSTAND VOLTAGE LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
*1. Parasitic diode
does not exceed V
Constant
current
s
supply
Reference voltage
and R
IN
.
V
ref
circuit
f
. It supplies a gate voltage necessary to maintain a constant output voltage which is
IN
Error amplifier
+ 0.3 V, to prevent the voltage regulator from being damaged due to inverse
−
+
Seiko Instruments Inc.
Figure 11
ref
) with V
fb
, which is the output voltage resistance-divided by
V
R
R
fb
f
s
*1
VOUT
S-1142 Series
OUT
15