GM1117-1.8ST3T Gamma Microelectronics, GM1117-1.8ST3T Datasheet

no-image

GM1117-1.8ST3T

Manufacturer Part Number
GM1117-1.8ST3T
Description
Manufacturer
Gamma Microelectronics
Datasheet
Description
GM1117 of positive adjustable and fixed regulators is de-
signed to provide 1.0A output with low dropout voltage per-
formance. On-chip trimming adjusts the reference voltage
to 1%. For usage on working in post regulators or micro-
processor power supplies, low voltage operation and fast
transient response are required.
Pin-to-pin compatible with the LT1086 family of regulators,
GM1117 is available in surface-mount SOT-223 and TO-
252 packages.
Application
TYPICAL APPLICATION CIRCUITS
High Efficiency Linear Regulators
Post Regulators for Switching Supplies
Microprocessor Supply
V > 4.75V
IN
MICROELECTRONICS
Notes:
1. C1 needed if device is far from filter capacitors
2. C2 minimum value required for stability
V
A
+
OUT
C1
10µF
Tant
3
=
V
(Adjustable Version)
V
IN
REF
GM1117-Adj
X (1 +
ADJ
1
A
R2
R1
V
OUT
) + I
ADJ
2
X
R2
R1
133W
1.0%
R2
232W
1.0%
V
OUT
1.0A LOW DROPOUT PRECISION LINEAR REGULATORS
+
= 3.45V
C2
10µF
Tant. Min
Power Management
V > 4.75V
Features
IN
Output Current of 1.0A
Dropout Voltage (Typical) 1.15V @ 1.0A
Line Regulation 0.2% max.
Load Regulation 0.4% max.
Fast Transient Response
Current Limit Protection
Thermal Shutdown Protection
Adjustable or Fixed Output
+
C1
10µF
Tant
3
V
IN
Hard Drive Controllers
Battery Chargers
Adjustable Power Supply
(Fixed Version)
GM1117-3.3
GND
1
V
www.gammamicro.com
OUT
2
V
OUT
+
C2
10µF
Tant. Min
GM1117
= 3.3V
1

Related parts for GM1117-1.8ST3T

GM1117-1.8ST3T Summary of contents

Page 1

... A A MICROELECTRONICS Description GM1117 of positive adjustable and fixed regulators is de- signed to provide 1.0A output with low dropout voltage per- formance. On-chip trimming adjusts the reference voltage to 1%. For usage on working in post regulators or micro- processor power supplies, low voltage operation and fast transient response are required. ...

Page 2

... GM1117-ATA3T GM1117-ATA3R GM1117-1.5ST3T GM1117-1.5ST3R GM1117-1.5TC3T GM1117-1.5TC3R GM1117-1.5TB3T GM1117-1.5TA3T GM1117-1.5TA3R GM1117-1.8ST3T GM1117-1.8ST3R GM1117-1.8TC3T GM1117-1.8TC3R GM1117-1.8TB3T GM1117-1.8TA3T GM1117-1.8TA3R * For detail Ordering Number identification, please see last page. 2 Power Management 1 ...

Page 3

... ST3R GM1117-3.0TC3T GM1117-3.0TC3R GM1117-3.0TB3T GM1117-3.0TA3T GM1117-3.0TA3R GM1117- 3.3 ST3T GM1117- 3.3 ST3R GM1117-3.3TC3T GM1117-3.3TC3R GM1117-3.3TB3T GM1117-3.3TA3T GM1117-3.3TA3R GM1117-5.0ST3T GM1117- 5.0 ST3R GM1117-5.0TC3T GM1117-5.0TC3R GM1117-5.0TB3T GM1117-5.0TA3T GM1117-5.0TA3R * For detail Ordering Number identification, please see last page. ...

Page 4

... Output Current Thermal Limit Error Shutdown Amplifier - + Bandgap Reference Output Current Thermal Limit Error Shutdown Amplifier - + Bandgap Reference GM1117 VALUE UNIT Internally limited W 7.0 V 300 ° 125 ° 150 - 150 °C 15 °C/ W 6.0 3.0 V OUT GND V OUT ADJ ...

Page 5

... GM1117-2.5 GM1117-3.3 GM1117-5.0 GM1117-Adj GM1117-1.8 Load Regulation GM1117-2.5 GM1117-3.3 GM1117-5.0 Dropout Voltage Current Limit Minimum Load Current GM1117-Adj GM1117-1.8 GM1117-2.5 Quiescent Current GM1117-3.3 GM1117-5.0 Adjust Pin Current GM1117-Adj Temp. Coefficient Thermal Regulation Ripple Rejection Power Management 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS ...

Page 6

... A detailed proce- dure for selecting this capacitor follows. Adjustable Operation The GM1117 has an output voltage range external resistor divider sets the output volt- age as shown in Figure 1. The regulator maintains a fixed 1.25V (typical) reference between the output pin and the adjust pin ...

Page 7

... Output Voltage Sensing The GM1117 are three terminal regulators. For which, they cannot provide true remote load sensing. Load regulation is limited by the resistance of the conductors connecting the regulator to the load. For best results the GM1117 should be connected are as shown in IN Figure ...

Page 8

... The value for R is 3.5°C/W for a given package type QJC based on an average die size. For a high current reg- ulator such as the GM1117 the majority of the heat is generated in the power transistor section. 8 Power Management 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS ...

Page 9

... T (°C) J Figure 4. Reference Voltage vs. Temperature 25°C CASE I = 1.0A OUT 3.0V IN OUT V = 1.0VP-P 25 RIPPLE C =0.1µF adj Frequency(Hz) Figure 6. Ripple Rejection vs. Frequency 3.5 3.3 3.1 2.9 2.7 2.5 2.3 2.1 1.9 1.7 1 1.0 1.5 2.0 2 Figure 8. Short Circuit Current vs GM1117 3.0 3.5 4.0 OUT(V) IN OUT 9 ...

Page 10

... R 0.25 ± 0.13 Unit: mm R0.15 max 1.80max 0.3 ± 0.05 3.0 ± 0.05 0.65 ± 0.10 1.75 ± 0.10 0.60 0.06 ± 0.04 0~0.075 0~10° 0.70 ± 0.05 4.6 ± 0.1 1.6 ± 0.10 Unit: mm 6.50 ± 0.10 GM1117 Pad Layout 0.244 6.20 0.118 3.0 0.228 0.243 6.172 5.80 0.063 0.101 1.6 2.58 Inches ( ) mm Pad Layout 0.15 3.8 0.079 2.0 0.248 6.3 ...

Page 11

... TYP (2.54 ± 0.20) 0.40 0.90 3° 3° R 0.3 10.00 ± 0.20 Power Management 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS 4.50 ± 0.20 +0.1 1.30 -0.05 3° 0.9 7.0 3° 3° 3-R0.2 +0.1 0.50 -0.05 2.40 ± 0.20 4.50 ± 0.20 +0.1 1.30 -0.05 Pad Layout 3° 0.10 ± 0.01 3° R0.30 3° 2.40 ± 0.20 2.00 ± 0.10 0.42 10.66 2.54 ± 0.10 0.75 +0.1 R0.30 0.50 -0.05 10.0 ± 0.20 7.0 4.0 R 0.45 7.2 9.20 ± 0.20 4.90 ± 0.20 Unit: mm GM1117 8.0 7.0 Unit: mm 0.63 17.02 0.33 0.12 8.38 3.05 0.24 6.096 0.04 1.016 Inches ( ) mm 11 ...

Page 12

... A A MICROELECTRONICS ORDERING NUMBER GM 1117 A ST3 R Gamma Micro. Circuit Type Output Voltage A: Adj, 1.5: 1.5V 1.8: 1.8V, 2.5: 2.5V 2.85: 2.85V, 3.0: 3.0V 3.3: 3.3V, 5.0: 5.0V 12 Power Management 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS Shipping R: Tape & Reel T: Tube Package TC3: TO-252 TB3: TO-220 TA3: TO-263-2 ST3: SOT-223 GM1117 ...

Page 13

... A A MICROELECTRONICS 1.0A LOW DROPOUT PRECISION LINEAR REGULATORS Power Management GM1117 13 ...

Related keywords