EZ1117 & EZ1117A
0.8 & 1.0 Amp Positive
Voltage Regulators
POWER MANAGEMENT
Description
Features
The EZ1117 series of high performance positive voltage
regulators are designed for use in applications requiring
low dropout performance at up to 0.8A (1A for EZ1117A).
u Low dropout performance: 1.2V max. for EZ1117,
1.3V max. for EZ1117A
u Full current rating over line and temperature
u Fast transient response
Additionally, the EZ1117 series provides excellent
regulation over variations in line, load and temperature.
Outstanding features include low dropout performance
at rated current, fast transient response, internal
current limiting and thermal shutdown protection of the
output device.
u +2% total output regulation over line, load and
temperature
u Adjust pin current max 90µA over temperature
u Fixed/adjustable output voltage
u Line regulation 0.2% max.
u Load regulation 0.4% max.
u SOT-223 and TO-263 packages
The EZ1117 series of three terminal regulators offer fixed
and adjustable voltage options available in the space
saving SOT-223 and TO-263 packages.
Applications
u Low voltage microcontrollers
u Switching power supply post-regulation
Typical Application Circuit
Fixed Voltage Regulator
U1
EZ1117-3.3
3
2
TAB
VIN > 4.75V
VOUT = 3.3V
IN
OUT
+
+
C1
10uF Tant.
C2
GND
1
10uF Tant. Min.
Adjustable Voltage Regulator
U1
IN
EZ1117
OUT
3
2
TAB
VIN > 4.75V
VOUT = 3.45V
+
+
C1
R1
C2
10uF Tant.
ADJ
1
133 Ohm, 1%
10uF Tant. Min
R2
232 Ohm, 1%
R2
R1
VOUT = VREF • 1+
+ IADJ • R2
Notes:
(1) C1 needed if device is far from filter capacitors
(2) C2 minimum value required for stability
Revision 1, December 2000
1
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