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PWM Switching Regulators
S pecialty providing in converting one
voltage into a higher voltage (boost) or reducing the voltage level
(buck)
This serial provides both fixed and adjustable version.
Output
Current range from 0.25A to 3A
Output Voltage range includes +/-4% and
+/-2.5%
Frequency:52KHz ~ 300KHz
Application:
Portable
configurations
LCD Panel
Set-Top-Box
Hard Disk Drive
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Part
No. |
VIN
Max
(V) |
Output
Current,
IO |
Switching
Configration |
Switching Frequency
(kHz) |
VOUT
Tolerance |
Package |
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GM7130 |
40 |
3A |
Internal |
52 |
3% |
TO263-5,
TO220-5, TO220B-5 |
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GM2574 |
40 |
1.5A |
Internal |
52 |
*2% |
SO8 |
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GM2576 |
40 |
2A |
Internal |
52 |
*2% |
SO8,
PSO8 |
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GM7230 |
40 |
3A |
Internal |
150 |
3% |
TO263-5,
TO220-5, TO220B-5 |
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GM7109 |
40 |
2A |
Internal |
150 |
*2% |
SO8,
PSO8 | |
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* VOUT
accuracy is to ±2% under
specified input voltage the output load conditions
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Part No. |
Min. ~ Max. Vin (V)
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Output Voltage (V)
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Vout Tolerance (%)
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Iout (A)
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Frequency Max (kHz)
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Special Function
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7 ~ 40 |
Adj
3.3 ~ 15 |
+/-4 |
1 |
52 |
OTP
Current Limiting |
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2.7~30 |
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1.5 |
280 |
OCP;OTP
Ext Sync |
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2 ~10 |
2.4 ~ 6 |
+/-2.5 |
0.25 |
300 |
PWM to PFM |
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DC–DC Converter
D C-DC Switching regulators are critical
devices used in converting one voltage into a higher voltage (boost) or reducing
the voltage level (buck). Tight voltage regulation, high efficiency, excellent
load and transient switching behaviors are the hallmark of this
class of
products.
Input Voltage: 3.0V ~ 40V
Switch Configuration: Internal
Frequency: Max. ~ 100KHz
DC-DC Switching Regulators and Controllers
are critical in applications.
Application:
Powering Motherboard
Processors
Providing bias to LCD displays used in digital
cameras
Providing bias to LCD displays used in cell phones
Cellular phone
charger
CD-ROM
SMPS
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Part
No. |
VIN
Max
(V) |
Output
Current,
IO |
Switching
Configration |
Frequency Max
(kHz) |
VIN
MIN
(V) |
Package |
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GM34063 |
40 |
1.5A |
External |
100 |
3 |
SO8,
DIP8 | |
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PWM Controller (AC–DC Switching Controller) |
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 T he GM384x series and GM38C4x
series (Bi-CMOS devices) of control integrated circuits provide the features
that are necessary to implement off-line or DC-to-DC fixed-frequency
current-mode control schemes, with a minimum number of external
components.
Some of the internally implemented circuits are an
under-voltage-lock-out (UVLO), featuring a start-up current of less than 1mA,
and a precision reference trimmed for accuracy at the error amplifier
input.
Other internal circuits include logic to ensure latched operation, a
pulse-width modulation (PWM) comparator (that also provides current-limit
control) with maximum frequency of 500KHZ, and a totem-pole output stage
designed to source or sink high-peak current.
The output stage, suitable for
driving N-channel MOSFETs, is low when it is in the off
state.
Application:
Power Supplier
Mother-board
Monitor Power
Supply
Power Switching
Package Types:
SOP-8, DIP-8 |
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Part No. |
Max. Vin (V)
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UVLO Threshold (On/ Off)
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Start - Up Current
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Duty Cycle (Typ)(%)
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Frequency Max. (kHz)
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Comments
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30 |
16/10 |
0.17mA |
97 |
500 |
PWM Controller |
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18 |
14.5/ 9 |
50µA |
96 |
>=500 |
Bi-CMOS PWM
Controller |
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