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MIC79050_05 Datasheet, PDF (3/14 Pages) Micrel Semiconductor – Simple Lithium-Ion Battery Charger | |||
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MIC79050
Micrel, Inc.
Absolute Maximum Ratings (Note 1)
Operating Ratings (Note 2)
Supply Input Voltage (VIN) ..............................â20V to +20V
Power Dissipation (PD)................ Internally Limited, Note 3
Junction Temperature (TJ) ........................ â40°C to +125°C
Lead Temperature (soldering, 5 sec.)........................ 260°C
Supply Input Voltage (VIN)............................ +2.5V to +16V
Enable Input Voltage (VEN) ...................................0V to VIN
Junction Temperature (TJ) ........................ â40°C to +125°C
Package Thermal Resistance (Note 3)................................
Storage Temperature (TS) ........................ â65°C to +150°C
Electrical Characteristics
MSOP-8 (θJA) ...................................................... 80°C/W
SOIC-8(θJA) ......................................................... 63°C/W
SOT-223(θJC) ...................................................... 15°C/W
VIN = VBAT + 1.0V; COUT = 4.7µF, IOUT = 100µA; TJ = 25°C, bold values indicate â40°C ⤠TJ ⤠+125°C; unless noted.
Symbol
Parameter
Conditions
Min Typical Max
Units
VBAT
ÎVBAT/ÎT
ppm/°C
Battery Voltage Accuracy
Battery Voltage
Temperature Coefï¬cient
variation from nominal VOUT â5°C to +60°C â0.75
+0.75 %
Note 4
40
ÎVBAT/VBAT Line Regulation
VIN = VBAT + 1V to 16V
0.009 0.05 %/V
0.1 %/V
ÎVBAT/VBAT Load Regulation
IOUT = 100µA to 500mA, Note 5
0.05 0.5
%
0.7
%
VIN â VBAT Dropout Voltage, Note 6
IOUT = 500mA
380 500 mV
600 mV
IGND
Ground Pin Current, Notes 7, 8
VEN ⥠3.0V, IOUT = 100µA
85
130
µA
170
µA
VEN ⥠3.0V, IOUT = 500mA
11
20
mA
25
mA
IGND
PSRR
Ground Pin Quiescent Current,
Note 8
Ripple Rejection
VEN ⤠0.4V (shutdown)
VEN ⤠0.18V (shutdown)
f = 120Hz
0.05
3
µA
0.10
8
µA
75
dB
ILIMIT
Current Limit
VBAT = 0V
750 900 mA
1000 mA
ÎVBAT/ÎPD Thermal Regulation
ENABLE Input
Note 9
0.05
%/W
VENL
Enable Input Logic-Low Voltage
VEN = logic low (shutdown)
0.4
V
0.18
V
IENL
IENH
Enable Input Current
VEN = logic high (enabled)
VENL ⤠0.4V (shutdown)
VENL ⤠0.18V (shutdown)
VENH ⥠2.0V (enabled)
2.0
V
0.01 â1
µA
0.01 â2
µA
5
20
µA
25
µA
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7:
Note 8:
Note 9:
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(max) = (TJ(max) â TA) ÷ θJA. Exceeding the
maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
Battery voltage temperature coefï¬cient is the worst case voltage change divided by the total temperature range.
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load
range from 100µA to 500mA. Changes in output voltage due to heating effects are covered by the thermal regulation speciï¬cation.
Dropout voltage is deï¬ned as the input to battery output differential at which the battery voltage drops 2% below its nominal value measured at
1V differential.
Ground pin current is the charger quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of the
load current plus the ground pin current.
VEN is the voltage externally applied to devices with the EN (enable) input pin. [MSO-8(MM) and SO-8 (M) packages only.]
Thermal regulation is the change in battery voltage at a time âtâ after a change in power dissipation is applied, excluding load or line regulation
effects. Speciï¬cations are for a 500mA load pulse at VIN = 16V for t = 10ms.
August 2005
3
MIC79050
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