G9611CP1U [GMT]
Low-Dropout, 300mA Linear Regulator with Reset; 低压差， 300毫安线性稳压器，带有复位
| 型号： | G9611CP1U |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | Low-Dropout, 300mA Linear Regulator with Reset |
| 文件： | 总7页 (文件大小：562K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Global Mixed-mode Technology Inc.
G9611
Low-Dropout, 300mA Linear Regulator with Reset
Features
General Description
300mA Output Current, with Foldback Current
The G9611 are low-dropout, linear regulator with
reset function supply 3.4V, 3.3V or 2.5V output for
currents up to 300mA. They are available in a
700mW SOP 8 package. Typical dropouts are
320mV at 300mA. Shutdown turns off linear regu-
lator function. Other features include foldback cur-
rent limiting and thermal overload protection.
Limiting
High Ripple Rejection
±2% Output Accuracy
±2% Reset Threshold Accuracy
Externally Programmable Reset Time Delay
Generator
Internal 300mA P-Channel Pass Transistor
320µA quiescent Current
Thermal Overload Protection
SOP 8 Package
The reset function in G9611 detect VCC level with
hysteresis, keeping it asserted for time delay de-
termined by external capacitor. The reset output is
active low open-drain output. The detection thresh-
old are 3.9V or 4.2V.
Applications
The output is preset at 3.4V for the G9611A, 3.3V
for the G9611B/C, and 2.5V for G9611D. The reset
threshold is preset at 4.2V for G9611 A/B/D and
3.9V for G9611C.
CD ROM or DVD ROM
Slim-Type CD/DVD
DVD Player
Ordering Information
PART
REGULATOR
OUTPUT VOLTAGE
RESET THRESHOLD
TEMP.
RANGE
PIN-
PACKAGE
SOP-8L
SOP-8L
SOP-8L
SOP-8L
MARKING
NUMBER
VOLTAGE
G9611AP1x
G9611BP1x
G9611CP1x
G9611DP1x
G9611A
G9611B
G9611C
G9611D
3.4
3.3
3.3
2.5
4.2
4.2
3.9
4.2
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Note: X Specify the packing type
U: Tape & Reel
T: Tube
Pin configuration
Typical Operation Circuit
VCC
C
G961111
Rppuu
1100kkΩΩ
R
llll
--hhiigghh
8
CDD
1
NN.C
VIN
2
7
GNND
RESEETT
11µF
RESET
G9611
SHDN
NN.C
3
6
SHDNN
OOUUTTPPUUTT
VVOOLLTTAAGGEE
VO
T
CD
4
VIINN
5
VOO
UUT
GND
1100µµFF
((TTaannttaalluumm oorr AAlluummiinnuumm))
SSOP-- 88LL
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.4
Jun 29, 2004
1
Global Mixed-mode Technology Inc.
G9611
Absolute Maximum Ratings
Supply Voltage (IN or OUT to GND……..-0.3V to +6.5V
Output Short-Circuit Duration…………….…………1 min
Input Voltage …………………..…-0.3V to the greater of
Operating Temperature Range……..…. -40°C to +85°C
Junction Temperature……………….……………+160°C
Storage Temperature Range…..…..….-65°C to +160°C
(IN+0.3V) or (OUT + 0.3V) Lead Temperature (soldering, 10sec)…...….…..+260°C
Continuous Power Dissipation (TA = +25°C)…...700mW
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability
Electrical Characteristics
VIN=5V, CIN=1µF, COUT=10µF, SHDN=VIN, TJ =TA=25°C (Note3), unless otherwise noted. Typical values for
regulators are at VIN =5V.
PARAMETER
Input Voltage
SYMBOL
CONDITION
MIN
2.5
3.332
3.234
2.45
---
TYP
---
MAX
6.0
UNIT
VIN
V
G9611A
G9611B/C
G9611D
3.4
3.3
2.5
6
3.468
3.366
2.55
15
Output Voltage (Note 1)
VOUT
V
Load Regulation
∆VLDR
∆VLNR
∆VDO
I
OUT=1mA to 300mA, VIN=VOUT +1V
(VOUT+0.5V) ≤ VIN ≤ 6V, IOUT =25mA
OUT=300mA
mV
mV
Line Regulation
-8
0.3
320
40
8
Dropout Voltage (Note 2)
Parameter Tempco VOUT
I
---
400
---
mV
---
ppm/°C
f=120HZ, IOUT=30mA
---
70
---
Ripple Rejection
PSRR
dB
f=120HZ, IOUT=300mA
20Hz to 100kHz, IOUT=30mA.
---
65
---
Output Noise
en
IQ
---
350
320
140
---
µVRMS
µA
Quiescent Current
OFF Quiescent Current
---
450
200
IQOFF
---
µA
SHDN ≤0.4V
VOUT<VFOLDBACK
VOUT>VFOLDBACK
260
650
0.6
---
400
900
0.78
160
30
580
1200
0.95
---
Foldback Current Limit
ILIM
mA
Foldback Voltage
VFOLDBACK
TSD
V
°C
°C
V
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
SHDN Pin Input High Threshold
SHDN Pin Input Low Threshold
∆TSD
VIH_ SHDN
---
---
1.8
0.6
4.11
3.81
---
2
2.3
1.1
4.29
3.99
---
VIL_ SHDN
0.8
4.2
3.9
150
130
40
V
G9611A/B/D
G9611C
Reset Threshold
VTH-
V
G9611A/B/D
G9611C
Reset Threshold Hysteresis
VHYS
mV
---
---
Reset Threshold Tempco
CD Delay Pin Threshold Voltage
CD Pin Sink Current
---
---
ppm/°C
V
VTCD
ICD
VCC = 5V
3.5
3
3.9
4.3
200
11.5
0.7
4.3
---
VCC=1.5V, VCD=0.5V
mA
kΩ
CD Pin Pullup Resistance
RESET Output Current Low
RESET Function Operating Voltage
RD
100
8
400
---
VCC=2.5V, V RESET =0.4V
RESET sink current>10µA
IOL
mA
V
VOP
---
0.85
Note 1: (VIN-VOUT) is limited to keep the product (IOUT x (VIN - VOUT)) from exceeding the package power dissipation
limits.
Note 2: Dropout Voltage is (VIN - VOUT) when VOUT falls to 100mV below its nominal value at VIN = VOUT+1V. For
example, the G9611 is tested by measuring the VOUT at VIN = VOUT+1V, then VIN is lowered until VOUT falls
100mV below the measured value. The difference (VIN - VOUT) is then measured and defined as ∆VDO
.
Note 3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.4
Jun 29, 2004
2
Global Mixed-mode Technology Inc.
G9611
Typical Performance Characteristics
(VIN=5V,CIN=COUT=10µF, SHDN=VIN, TJ=25°C, unless otherwise noted)
Load transient
SHDN Pin vs. Output
Line Transient
Line Transient
Over Current Response
Short Circuit Response
TEL: 886-3-5788833
Ver: 1.4
http://www.gmt.com.tw
Jun 29, 2004
3
Global Mixed-mode Technology Inc.
G9611
Typical Performance Characteristics (continued)
Power Supply Rejection Ratio
Power Supply Rejection Ratio
Safe Operating Area of G9611 SO-8
Power Supply Rejection Ratio
0.305
0.3
0.295
0.29
0.285
0.28
0.275
0.27
0.265
0.26
TA=25°C
0.255
0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7
Input -Output Voltage Differential(V)
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.4
Jun 29, 2004
4
Global Mixed-mode Technology Inc.
G9611
Pin Description
PIN NO.
PIN NAME
N.C
PIN FUNCTION
1, 6
2
No Connection.
RESET
RESET Open-Drain Output remains low while VIN is below the reset threshold,
and for delay time set by CD after VIN rises above the reset threshold.
SHDN = High to enable regulator output.
3
SHDN
SHDN = Low to shutdown regulator output.
4
5
7
8
VIN
VOUT
GND
CD
Regulator Input. Supply voltage can range from 2.5V to 6V.
Regulator Output. Sources up to 300mA.
Ground
External Programmable time delay is set by the capacitor connect to CD pin.
VIN
－
MOSFET DRIVER
SHUTDOWN
LOGIC
P
WITH FOLDBACK
CURRENT LIMIT
SHDN
RESET
＋
VOUT
－
＋
RD
THERMAL
1.24V
PROTECTION
REFERENCE
CD
R1
R2
GND
Figure 1. Functional Diagram
The G9611 also offer reset function to detect the level
of VIN. They assert a reset signal whenever VIN supply
voltage declines below a preset threshold (VTH), keep-
ing it asserted for time delay set by capacitor con-
nected to CD pin, after VIN has resen above the high
Detailed Description
The G9611 are low-dropout, low-quiescent current
linear regulators with reset function The regulator in
G9611 supply 3.4V, 3.3V or 2.5V output for load cur-
rents up to 300mA. The reset function detect VIN. As
illustrated in Figure 1, they consist of a 1.24V refer-
ence, error amplifier, MOSFET driver, P-channel pass
transistor, and internal feedback voltage divider, reset
threshold comparator and time delay generator.
reset threshold (VTH + VHYS). The RESET is an active
low, open-drain output.
Internal P-Channel Pass Transistor
The G9611 feature a 300mA P-channel MOSFET
pass transistor. This provides several advantages over
similar designs using PNP pass transistors, including
longer battery life. The P-channel MOSFET requires
no base drive, which reduces quiescent current con-
siderably. PNP based regulators waste considerable
amounts of current in dropout when the pass transistor
saturates. They also use high base-drive currents un-
der large loads. The G9611 do not suffer from these
problems and consume only 320µA of quiescent cur-
rent.
The 1.24V bandgap reference is connected to the er-
ror amplifier’s inverting input. The error amplifier com-
pares this reference with the feedback voltage and
amplifies the difference. The MOSFET driver reads the
error signal and applies the appropriate drive to the
P-channel pass transistor. If the feedback voltage is
lower than the reference, the pass transistor gate is
pulled lower, allowing more current to pass and in-
creasing the output voltage. If the feedback voltage is
too high, the pass transistor gate is pulled up, allowing
less current to pass to the output.
Additional blocks of linear regulator include a foldback
current limiter, thermal sensor, and shutdown logic.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.4
Jun 29, 2004
5
Global Mixed-mode Technology Inc.
G9611
Shutdown
The power dissipation of G9611 is:
PD = (VIN - VOUT) x IOUT
A low input on the SHDN pin shuts down the G9611.
In the off mode, the pass transistor, regulator control
circuit are turned off, Only reset function is turned on,
The worst-case thermal resistance from case to air
reducing the supply current below 140µA. SHDN
should be connected to VIN for normal operation.
Use a fast comparator, Schmitt trigger, or CMOS or
(θCA) requirements are:
(125°C -TA)
TTL Logic to drive the SHDN pin in and out of shut-
down. Rise times should be shorter than 1µs. Do not
use slow RC circuits, leave SHDN open, or allow the
input to linger between thresholds.
θCA
=
PD
Use larger copper pad area to obtain specific heat sink
thermal resistance values for larger output current,
higher input-output difference, and higher ambient
temperature.
Foldback Current Limiting
The G9611 also include a foldback current limiter. It
monitors and controls the pass transistor’s gate volt-
age, estimating the output current and limiting it to
900mA for output voltages above 0.78V. If the output
voltage drops below 0.78V, implying a short-circuit
condition, the output current is limited to 400mA.
CD Capacitor Selection
The reset timeout delay is set by internally pull-up RD
(typical value 200kΩ) and external CD.
When the voltage at CD pin exceeds the buffer thresh-
old, typically 0.8 VCC, the RESET output high. The
voltage detector and buffer have built-in hysterisis to
prevent erratic reset operation. For CD = 0.1µF, typical
reset time delay is 30ms. The formula of delay time is:
Thermal Overload Protection
Thermal overload protection limits total power dissipa-
tion in the G9611. When the junction temperature ex-
ceeds TJ = +160°C, the thermal sensor sends a signal
to the shutdown logic, turning off the pass transistor
and allowing the IC to cool. The thermal sensor will
turn the pass transistor on again after the IC’s junction
temperature cools by 30°C, resulting in a pulsed out-
put during thermal overload conditions.
T(ms) = 303 x CD(µF)
Regulator Output Capacitor Selection and Regu-
lator Stability
Normally, use capacitors 0.1µF minimum on the input
and 10µF minimum on the output of the G9611. The
larger input capacitor values provide better supply noise
rejection and line-transient response. Improve load tran-
sient response, stability, and power-supply rejection by
using large output capacitors. For stable operation over
the full temperature range and with load current up to
300mA, 10µF tantalum or 47µF aluminum minimum is
recommended. Too small capacitors with small ESR
can result in oscillation.
Thermal overload protection is designed to protect the
G9611 in the event of fault conditions. For continual
operation, the absolute maximum junction temperature
rating of TJ = +160°C should not be exceeded.
Operating Region and Power Dissipation
Maximum power dissipation of the G9611 depends on
the thermal resistance of the case and circuit board,
the temperature difference between the die junction
and ambient air, and the rate of air flow. The power
dissipation across the device is P = IOUT (VIN-VOUT).
The resulting maximum power dissipation is:
Transient Considerations
The Typical Operating Characteristics show the
G9611 load-transient response. Two components of
the output response can be observed on the
load-transient graphs—a DC shift from the output im-
pedance due to the different load currents, and the
transient response. Typical transients for step changes
in the load current from 5mA to 500mA are 0.1V. In-
creasing the output capacitor’s value attenuates tran-
sient spikes.
(TJ-TA)
(θJC+θCA)
PMAX=
where (TJ -TA) is the temperature difference between
the G9611 die junction and the surrounding air, θJC is
the thermal resistance of the package chosen, and θCA
is the thermal resistance through the printed circuit
board, copper traces and other materials to the sur-
rounding air. The thermal resistance of SOP-8 is θJC
= 192°C/W.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.4
Jun 29, 2004
6
Global Mixed-mode Technology Inc.
G9611
Package Information
C
H
E
L
D
θ
7 ° (4X)
A2
A1
A
y
e
B
Note:
1. Package body sizes exclude mold flash and gate burrs
2. Dimension L is measured in gage plane
3. Tolerance 0.10mm unless otherwise specified
4. Controlling dimension is millimeter converted inch dimensions are not necessarily exact.
DIMENSION IN MM
DIMENSION IN INCH
SYMBOL
MIN.
1.35
0.10
-----
NOM.
1.60
-----
1.45
-----
-----
-----
-----
1.27
-----
-----
-----
-----
MAX.
1.75
0.25
-----
MIN.
0.053
0.004
-----
NOM.
0.063
-----
MAX.
0.069
0.010
-----
A
A1
A2
B
0.057
-----
0.33
0.19
4.80
3.80
-----
0.51
0.25
5.00
4.00
-----
0.013
0.007
0.189
0.150
-----
0.020
0.010
0.197
0.157
-----
C
D
E
-----
-----
-----
e
0.050
-----
H
L
5.80
0.40
-----
6.20
1.27
0.10
8º
0.228
0.016
-----
0.244
0.050
0.004
8º
-----
y
θ
-----
0º
0º
-----
Taping Specification
Feed Direction
Typical SOP Package Orientation
GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.4
Jun 29, 2004
7
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