ZTP1117
1A Low Dropout Positive Voltage Regulator
FEATURES
DESCRIPTION
● Adjustable
The ZTP1117 series of positive adjustable and
fixed regulators are designed to provide 1A
with high efficiency. All internal circuitry is
designed to operate down to 1.4V input to
output differential.
On-chip trimming adjusts the reference
voltage to 1%. Current limit the typical value of
1.5A allows to minimize the stress on both the
regulator and the power source circuitry under
overload conditions.
or Fixed Output
● Output Current of 1A
● Low Dropout, 1.2 V typ. at 1A Output
Current
● 0.04% Line Regulation
● 0.2 % Load Regulation
● 100% Thermal Limit Burn-In
● Fast Transient Response
● Current-Limit : 1A Typ. at TJ = 25°C
● On-Chip Thermal Limiting: 150°C Typ.
● Standard 3-pin SOT-223 TO-252 Power
Packages.
Pins Configuration
SOT-223
APPLICATIONS
● High
Efficiency Linear Regulators
● Post Regulators for Switching Supplies
● Adjustable Power Supply
1 2 3
ORDERING INFORMATION
PART
PACKAGE RoHS
ADJ/GND
OUTPUT
Ship, Quantity
ZTP1117SA
SOT-223
Yes
Tape and Reel, 3000
ZTP1117Sxx
SOT-223
Yes
Tape and Reel, 3000
ZTP1117UA
TO-252
Yes
Tape and Reel, 3000
ZTP1117Uxx
TO-252
Yes
Tape and Reel, 3000
INPUT
TO-252
The last letter(s) of PART No. denote the Output Voltage:
A = adjustable; xx = 12: 1.2V; xx = 15: 1.5V;xx = 18: 1.8V;
xx = 25: 2.5V; xx = 33: 3.3V; xx = 50: 5.0V.
Typical Application Circuits
Fixed Voltage Regulator
Adjustable Voltage Regulator
TAB
TAB
VIN > 4.7V
3
IN
C1
10μF
MLCC
ZTP1117 OUT
2
GND
1
VOUT = 3.3V
C2
10μF Min
MLCC
Notes:
1) C1 needed if device is far from filter capacitors.
2) C2 minimum value required for stability.
DS-21
Copyright © ZillTek Technology Corp.
VIN > 4.85V
3
IN
C1
10μF
MLCC
ZTP1117 OUT
Adj
1
R1
133Ω, 1%
VOUT = VREF × (1 + R2/R1) + IADJ ×R2
-1-
VOUT = 3.45V
2
C2
10μF Min
MLCC
R2
232Ω, 1%
4F-3, No.5, Technology Rd., Science-Based
Industrial Park, Hsinchu 30078, Taiwan
Tel: (886) 3577 7509; Fax: (886) 3577 7390
Email: sales@zilltek.com
ZTP1117
Absolute Maximum Ratings
Electro-Static Discharge Sensitivity
Power Dissipation PD ………………………… Internally Limited
Input Voltage VIN ………………………………………………….. +20V
Operating Junction Temperature TJ …… –40°C to +125°C
Storage Temperature TSTG …………............ –65°C to +150°C
Lead Temperature (Soldering 10sec) ………………… +300°C
Minimum ESD Rating (HBM) VESD ……...…………………… 3kV
This integrated circuit can be damaged by ESD.
It is recommended that all integrated circuits
be handled with proper precautions. Failure
to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure.
CAUTION: Stresses above those listed in “Absolute
Maximum Ratings” may cause permanent damage to
the device. This is a stress only rating and operation of
the device at these or any other conditions above those
indicated in the operational sections of this specification
is not implied.
Pins Description
Pin
Description
1
ADJ/GND
2
OUTPUT
3
INPUT
Package Thermal Characteristics
Thermal Resistance, SOT-223, θJA ............…………. 63°C/W
Thermal Resistance, TO-252, θJA ………………………. 50°C/W
Thermal Resistance, SOT-223, θJC ……………………… 27°C/W
Thermal Resistance, TO-252, θJC ………………………. 10°C/W
Functional Block Diagram
Vin
+
_
Vout
For fixed
voltage
device
For adjustable
voltage device
ADJ
DS-21
Copyright © ZillTek Technology Corp.
GND
-2-
4F-3, No.5, Technology Rd., Science-Based
Industrial Park, Hsinchu 30078, Taiwan
Tel: (886) 3577 7509; Fax: (886) 3577 7390
Email: sales@zilltek.com
ZTP1117
Electrical Specifications
(ILOAD = 0mA, TJ = +25°C, unless otherwise noted.)
PARAMETER
Device
Operating Voltage
Output Voltage
VIN
Adj
Reference Voltage
(Note 1)
Adj
TEST CONDITIONS
Adjust Pin Current
Adj
Current Limit
Ripple Rejection
(Note 2)
All
All
VIN – VOUT = 2.5V, ILOAD = 1A
All fixed
version
VOUT = +1.2V
Output Voltage Accuracy
(at Wafer Testing)
All
Line Regulation
All
Load Regulation
(Note 1)
Minimum Load Current
Ground Pin Current
All
Adj
All fixed
version
Dropout Voltage
(Note 1, 3)
All
Temperature Coefficient
Current-Limit
On-Chip Thermal Limiting
All
All
All
TYP
MAX
UNIT
1.25
1.232
V
V
1.250
16
14.6
1.268
1.225
1.250
1.275
F
Maximum PD < 2.25W
VIN = +5V, ILOAD = 10mA
1.5V ≤ VIN – VOUT ≤ 10V,
ILOAD = 10mA to 1A
VIN = VOUT + 1.5V,
Variation from nominal VOUT
1.5V ≤ VIN – VOUT ≤ 10V,
ILOAD = 0mA to 1A,
Variation from nominal VOUT
VIN = VOUT + 1.5V,
ILOAD = 10mA
ILOAD = 10mA,
1.5V ≤ VIN – VOUT ≤ 10V
VIN = VOUT + 1.5V,
ILOAD = 10mA to 1A
VIN = +5V, VADJ = 0V
VIN = VOUT + 1.5V,
ILOAD = 10mA to 1A
1.5V ≤ VIN – VOUT ≤ 10V,
ILOAD = 10mA
VIN – VOUT = 1.5V
Output Voltage
(Note 1)
MIN
ILOAD = 500mA
ILOAD = 1A
VIN – VOUT = 1.5V, ILOAD = 10mA
TJ = 25°C
F
F
–1.5
+1.5
–2
+2
–3
+2
–0.6%
V
%
0
+0.6%
%
F
0.04
0.238
F
0.4
0.8
F
2
7
mA
F
3.5
6
mA
F
35
60
μA
1.5
2
A
%
F
1
60
F
F
F
dB
1.15
1.20
1
150
1.25
1.40
0.015
V
V
%/°C
A
°C
The “F” denotes the specifications which apply over the full temperature range: −40°C ≤ TJ ≤ +125°C.
Note 1: Low duty pulse testing with Kelvin connections required.
Note 2: 120Hz input ripple (CADJ for ADJ = 25μF).
Note 3: ΔVOUT, ΔVREF = 1%.
DS-21
Copyright © ZillTek Technology Corp.
-3-
4F-3, No.5, Technology Rd., Science-Based
Industrial Park, Hsinchu 30078, Taiwan
Tel: (886) 3577 7509; Fax: (886) 3577 7390
Email: sales@zilltek.com
ZTP1117
Load Transient Response
Line Transient Response
Load Regulation (Input Voltage = 5V)
Line Regulation (Output Current = 100mA)
3.325
3.324
3.323
3.322
3.321
3.32
3.319
3.318
3.317
3.316
3.315
3.314
3.321
ZTP1117S33
ZTP1117S33
3.32
3.319
Output Voltage (V)
Output Voltage (V)
Typical Characteristics
3.318
3.317
3.316
3.315
3.314
0
0.2
0.4
0.6
0.8
1
5
7
9
11
13
15
Input Voltage (V)
Output Current (A)
Output Voltage vs. Input Voltage
Input Current vs. Input Voltage
4
6
3.3V
3.5
5
2.5V
2.5
Input Current (mA)
Output Voltage (V)
3
1.8V
2
1.5
1
0.5
0
ZTP1117S33
4
3
2
1
0
0
1
2
3
4
5
6
0
Input Voltage (V)
DS-21
Copyright © ZillTek Technology Corp.
2
4
6
8
10
12
14
16
Input Voltage (V)
-4-
4F-3, No.5, Technology Rd., Science-Based
Industrial Park, Hsinchu 30078, Taiwan
Tel: (886) 3577 7509; Fax: (886) 3577 7390
Email: sales@zilltek.com
ZTP1117
Output Voltage vs. Temperature (3.3V)
3
3.4
2.5
3.35
2
3.3
Output Voltage (V)
Current Limit (A)
Current Limit vs. Input Voltage
1.5
1
ZTP1117S33
0.5
0
5
7
9
11
13
3.25
3.2
3.15
3.1
15
Input Voltage (V)
-50
-25
0
25
50
75
100
125
Temperature (°C)
Output Voltage vs. Temperature (1.8V)
2.65
1.95
2.6
1.9
2.55
1.85
Output Voltage (V)
Output Voltage (V)
Output Voltage vs. Temperature (2.5V)
2.5
2.45
2.4
1.8
1.75
1.7
1.65
2.35
-50
-25
0
25
50
75
100
-50
125
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
PSRR vs. Frequency
90
80
PSRR (dB)
70
60
50
40
30
20
0.01
0.1
1
10
100
Frequency (KHz)
DS-21
Copyright © ZillTek Technology Corp.
-5-
4F-3, No.5, Technology Rd., Science-Based
Industrial Park, Hsinchu 30078, Taiwan
Tel: (886) 3577 7509; Fax: (886) 3577 7390
Email: sales@zilltek.com
ZTP1117
divider ratio, the effective resistance between the
regulator and the load would be:
APPLICATION INFORMATION
Output Voltage
RP × (1 + R2/R1), RP = Parasitic Line Resistance
The ZTP1117 develops a 1.25V reference voltage
between the output and the adjust terminal. By placing
a resistor between these two terminals, a constant
current is caused to flow through R1 and down through
R2 to set the overall output voltage. Normally, this
current is chosen to be the specified minimum load
current of 10mA. For fixed voltage devices R1 and R2 are
included in the device.
ZTP1117
VIN
IN
Input Capacitor
An input capacitor of 10μF or greater is recommended.
Tantalum or aluminum electrolytic capacitors can be
used for bypassing. Larger Values will improve ripple
rejection by bypassing the input to the regulator.
Output Capacitor
The ZTP1117 requires an output capacitor to maintain
stability and improve transient response. Proper
capacitor selection is important to ensure proper
operation. The ZTP1117 output capacitor selection is
dependent upon the ESR (equivalent series resistance)
of the output capacitor to maintain stability. When the
output capacitor is 10μF or greater, the output capacitor
should have an ESR less than 1Ω. This will improve
transient response as well as promote stability. A
low-ESR solid tantalum capacitor works extremely well
and provides good transient response and stability over
temperature.
Aluminum electrolytic can also be used, as long as the
ESR of the capacitor is