Datasheet

   
     
   
SLVS296 − JUNE 2000
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
description (continued)
Three operating modes can be programmed using the SNOOZE pin. When SNOOZE is low, the device is put
into snooze mode. In snooze mode, the device operates with a typical quiescent current of 2 µA while the output
voltage is maintained at 3.3 V ±6%. This is lower than the self-discharge current of most batteries. Load current
in snooze mode is limited to 2 mA. When SNOOZE
is high, the device is put into normal operating mode. During
normal operating mode, the device operates in the newly developed linskip mode where it switches seamlessly
from the power saving pulse-skip mode at light loads to the low-noise constant-frequency linear-regulation
mode once the output current exceeds the linskip current threshold of about 7 mA. In this mode, the device
operates from the internal oscillator. The device is synchronized to an external clock signal if SNOOZE
is
clocked; thus switching harmonics can be controlled and minimized.
Only four external capacitors are needed to build a complete low-ripple dc/dc converter. The push-pull operating
mode of two single-ended charge pumps assures the low output voltage ripple as charge is continuously
transferred to the output. All the devices can start with full load current. The devices include a low-battery
detector that issues a warning if the battery voltage drops below a user-defined threshold voltage or a
power-good detector that goes active when the output voltage reaches about 90% of its nominal value. This
dc/dc converter requires no inductors; therefore, EMI of the system is reduced to a minimum, making it easier
to use in designs. It is available in the small 10-pin MSOP package (DGS).
DGS PACKAGES
1
2
3
4
5
10
9
8
7
6
LBI
GND
C1−
C1+
OUT
LBO
SNOOZE
C2−
IN
C2+
TPS60210
TPS60212
1
2
3
4
5
10
9
8
7
6
GND
GND
C1−
C1+
OUT
PG
SNOOZE
C2−
IN
C2+
TPS60211
TPS60213
AVAILABLE OPTIONS
T
A
PART NUMBER
†
MARKING
DGS
PACKAGE
OUTPUT
CURRENT
(mA)
OUTPUT
VOLTAGE
(V)
DEVICE FEATURES
TPS60210DGS AFD 100 3.3 Low-battery detector
−40°C to 85°C
TPS60211DGS AFE 100 3.3 Power-good detector
−40
°
C to 85
°
C
TPS60212DGS AFF 50 3.3 Low-battery detector
TPS60213DGS AFG 50 3.3 Power-good detector
†
The DGS package is available taped and reeled. Add R suffix to device type (e.g., TPS60210DGSR) to order
quantities of 3000 devices per reel.