AIC1631ACS Analog Intergrations Corporation, AIC1631ACS Datasheet

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AIC1631ACS

Manufacturer Part Number
AIC1631ACS
Description
Manufacturer
Analog Intergrations Corporation
Datasheet
Analog Integrations Corporation
DS-1631-04 Dec 27, 00
FEATURES
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
High Efficiency 90%.
Adjustable Output Voltage with Two Resistors
(AIC1631A)
Power-Saving Shutdown Mode (7µA typical).
Internal 2A Switch.
120KHz Switching Rate.
Adjustable Switch Current Limit.
On-Chip Low Battery Detector.
Palmtop & Notebook Computers.
Pocket Organizers.
Cameras.
Pagers.
Battery Backup Supplies.
Portable Instruments.
+V
(3.3V)
OUT
LOAD
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
C2
+
100µF
High Efficiency Step-Up DC/DC Converter
1N5819
2-Cell, 500mA, Step-Up DC/DC Converter
D1
+V
Note: V
IN
FAX: 886-3-5772510
L
IN
≥ ≥ ≥ ≥ 1.8V, V
50µH
100Ω
R1
OUT
≤ ≤ ≤ ≤ 7V
+
100µF
C1
DESCRIPTION
The AIC1631 is a high efficiency step up DC-
DC converter. Only four external components
are required to deliver a fixed voltage of 3V,
3.3V, or 5V. The output voltage can be exter-
nally set to an arbitrary value below breakdown
voltage of the power switch for AIC1631A. Effi-
ciency beyond 87% can be easily achieved at
100mA load with 2.2V to 3V input voltages.
Logic-controlled shutdown mode is provided for
power saving. Switch current limit can be pro-
grammed with a resistor. The low battery de-
tector can be configured as a linear regulator or
a burst mode controller performing an extremely
low supply current operation.
120KHz switching rate reduces the inductor size.
Inductors of 25µH to 50µH inductance are
commended for most applications.
NORMAL
SD
R
ILIM
ILIM/SD
VIN
SW
SGND
AIC1631
CGND
VOUT
LBO
LBI
www.analog.com.tw
AIC1631
re-
1

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AIC1631ACS Summary of contents

Page 1

FEATURES High Efficiency 90%. Adjustable Output Voltage with Two Resistors (AIC1631A) Power-Saving Shutdown Mode (7µA typical). Internal 2A Switch. 120KHz Switching Rate. Adjustable Switch Current Limit. On-Chip Low Battery Detector. APPLICATIONS Palmtop & Notebook Computers. Pocket Organizers. Cameras. Pagers. Battery ...

Page 2

... Shutdown Mode Current Shutdown Recovery Time ORDER NUMBER AIC1631CN AIC1631-3CN AIC1631-5CN (PLASTIC DIP AIC1631CS AIC1631-3CS AIC1631-5CS (PLASTIC SO) AIC1631ACN (PLASTIC DIP AIC1631ACS (PLASTIC SO) =3.0V, Ta=25° ° ° ° C, unless otherwise specified TEST CONDITIONS Fig Appl. Examples I =200mA LOAD AIC1631 AIC1631-3 AIC1631-5 ...

Page 3

ELECTRICAL CHARACTERISTICS PARAMETER Efficiency Line Regulation Load Regulation Oscillator Frequency LBI Pin Trip Point FB Threshold Voltage SW “ON Resistance” LBO “ON Resistance” SW Off Leakage Input Pin Bias Current Output Pin Leakage TYPICAL PERFORMANCE CHARACTERISTICS Switch Voltage vs. Current ...

Page 4

TYPICAL PERFORMANCE CHARACTERISTICS No Load Supply Current vs. Input Voltage 200 190 180 170 160 AIC1631/1631-3 150 140 1 1.5 2.0 2.5 3.0 3.5 V (V) IN Shutdown Mode Supply Current vs. Input Voltage 8.2 Ta=25°C 8.0 7.8 7.6 7.4 ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Maximum Load Current vs. Switch Current Limit Resistance 600 AIC1631/1631-3 Ta=25 ° C 500 (5% V OUT 400 300 V =2.2V IN 200 V =2.5V IN 100 0 0 200 400 600 R (KΩ) ILIM BLOCK DIAGRAM ...

Page 6

PIN DESCRIPTIONS AIC1631/ AIC1631-3 / AIC1631-5 PIN 1: ILIM/SD- 1. Connected through a resistor to set the switch peak serves to protect IC and in- ductor, as well as to im- prove efficiency and output ripples. capability of the AIC1631 ...

Page 7

AIC1631A (continued) PIN 7: LBI - The noninverting input of the battery low detector, of which the inverting input is internally con- nects to 1.22V voltage reference. PIN 8: VOUT- The output voltage feedbacks to the IC through this pin. ...

Page 8

APPLICATION EXAMPLES +V OUT (+3V) 100Ω 47µF 10µF LOAD L1 1N5819 D1 + 100µF C2 Fig. 3 1-Cell Input 3V Output Step-Up Converter +V OUT R1 (+5V 100Ω + 47µH L1 LOAD 1N5819 ...

Page 9

APPLICATION EXAMPLES +V OUT 100 Ω (+5V) R1 50µH ILIM/SD L1 LOAD + C2 VIN 47µF SW 1N5819 D1 SGND + 100µF AIC1631 CTL= GND in Burst Mode CTL=VIN in Normal Mode Fig. 6 Low Supply Current Burst ...

Page 10

PHYSICAL DIMENSION 8 LEAD PLASTIC SO (unit: mm LEAD PLASTIC DIP (unit: mm AIC1631 SYMBOL MIN A 1.35 A1 0.10 B ...

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