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PDF MB3827 Data sheet ( Hoja de datos )
| Número de pieza | MB3827 | |
| Descripción | 6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down | |
| Fabricantes | Fujitsu Media Devices | |
| Logotipo |  |
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FUJITSU SEMICONDUCTOR
DATA SHEET
DS04-27222-1E
ASSP For Power Supply Applications
6-ch DC/DC Converter IC
With Synchronous Rectification for voltage step-up and step-down
MB3827
s DESCRIPTION
The MB3827 is a pulse width modulation (PWM) type 6-channel DC/DC converter IC with, synchronous rectifi-
cation for voltage step-up and step-down. The MB3827 is ideal for low voltage, high efficiency, compact applications
and for down conversion and up/down conversion (with two types of voltage step-up/step-down methods allowing
input/output relations to be set independently).
In addition the MB3827 features a built-in self-supply power channel (channel 7) providing a wide range of supply
voltages, and operates from two dry-cell batteries.
This product is ideal for high performance portable devices such as digital still cameras.
s FEATURES
• Compatible with step-up/step-down switching methods (channel 1)
• Compatible with step-up/step-down Zeta methods (channels 2 to 6)
• Synchronous rectification (channels 1 and 2)
• Low start-up voltage : 1.8 V (channel 7 for self-power supply)
• Power supply voltage range : 4 V to 13 V (channels 1 to 6)
• Built-in high-precision reference voltage generator : 2.5 V±1%
• Oscillator frequency range : 100 kHz to 800 kHz
• Error amplifier output for soft start (channels 1 to 6)
s PACKAGE
64-pin plastic LQFP
(FPT-64P-M03)
1 page  
MB3827
(Continued)
Pin No.
Symbol I/O
Description
26 VCC — Reference voltage and control circuit power supply pin.
53 VCC(O)1,2 — Output circuit power supply pin (Channel 1, 2).
58 VCC(O)3,4 — Output circuit power supply pin (Channel 3, 4).
64 VCC(O)5,6,7 — Output circuit power supply pin (Channel 5, 6, 7).
54 VSS(O)1,2 — Main side output circuit power supply pin (Channel 1, 2).
51
VG(O)1
—
Step-up synchronous rectifier side output circuit power supply pin
(Channel 1).
59 VSS(O)3,4,5,6 — Output circuit power supply pin (Channel 3, 4, 5, 6).
24 VREF O Reference voltage output pin.
32 VB O Triangular wave oscillator regulator output pin.
25 GND — Ground pin.
46 GND(O)1 — Output circuit ground pin (Channel 1).
56 GND(O)2,3,4 — Output circuit ground pin (Channel 2, 3, 4).
3 GND(O)5,6,7 — Output circuit ground pin (Channel 5, 6, 7).
5
5 Page 
MB3827
s ELECTRICAL CHARACTERISTICS
Parameter
Symbol Pin No.
Output voltage
VREF
Output voltage
temperature stability
∆VREF
/VREF
Input stability
Line
Load stability
Load
Short-circuit output current IOS
24
24
24
24
24
(Ta = +25°C, VCC = 9 V, VSS = 4.4 V, VG = 11 V)
Conditions
Value
Unit
Min. Typ. Max.
— 2.475 2.5 2.525 V
Ta = –30°C to +85°C — 0.5* — %
VCC = 4 V to 13 V
–10
VREF = 0 mA to –1 mA –10
VREF = 2 V
–20
—
—
–5
10 mV
10 mV
–1 mA
Threshold voltage
VTH 52 VCC =
2.6 2.8 3.0 V
Hysteresis width
VH 52
— — 0.2 — V
Reset voltage
VRST
52
— 1.35 1.50 1.65 V
Threshold voltage
VTH 1 VCC =
1.3 1.5 1.7 V
Input standby voltage
VSTB
30
— — 50 100 mV
Charge current
Threshold voltage
Input standby voltage
Input latch voltage
Input source current
Oscillator frequency
Frequency voltage
stability
Frequency temperature
stability
*: Standard design value.
ICS 30
— –1.4 –1.0 –0.6 µA
VTH
VSTB
VI
31
31
31
—
—
—
ICSCP
31
—
fOSC
∆f/fdV
∆f/fdT
52,50,49,48,
55,57,60,61,
62,63
CT = 100 pF,
RT = 18 kΩ
52,50,49,48,
55,57,60,61, VCC = 4 V to 13 V
62,63
52,50,49,48,
55,57,60,61, Ta = –30°C to +85°C
62,63
0.63 0.68 0.73 V
— 50 100 mV
— 50 100 mV
–1.4 –1.0 –0.6 µA
450 500 550 kHz
— 1 10 %
— 1* — %
(Continued)
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MB3827.PDF ] | |
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